Harvey II (for now)

 

 

 

 


211729WPCQPF_sm

 



 

BULLETIN
Tropical Depression Harvey Intermediate Advisory Number 13A
NWS National Hurricane Center Miami FL AL092017
700 PM CDT Wed Aug 23 2017

…HURRICANE HUNTER AIRCRAFT FINDS THAT HARVEY HAS NOT
STRENGTHENED…

 

SUMMARY OF 700 PM CDT…0000 UTC…INFORMATION
———————————————-
LOCATION…21.7N 92.5W
ABOUT 525 MI…845 KM SSE OF PORT OCONNOR TEXAS
ABOUT 460 MI…740 KM SE OF PORT MANSFIELD TEXAS
MAXIMUM SUSTAINED WINDS…35 MPH…55 KM/H
PRESENT MOVEMENT…NW OR 320 DEGREES AT 2 MPH…4 KM/H
MINIMUM CENTRAL PRESSURE…1003 MB…29.62 INCHES

 

WATCHES AND WARNINGS
——————–
CHANGES WITH THIS ADVISORY:

None.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT:

A Storm Surge Watch is in effect for…
* Port Mansfield to High Island

A Hurricane Watch is in effect for…
* North of Port Mansfield to San Luis Pass

A Tropical Storm Watch is in effect for…
* Boca De Catan Mexico to Port Mansfield Texas
* North of San Luis Pass to High Island

A Storm Surge Watch means there is a possibility of life-
threatening inundation, from rising water moving inland from the
coastline, in the indicated locations during the next 48 hours.
For a depiction of areas at risk, please see the National Weather
Service Storm Surge Watch/Warning Graphic, available at
hurricanes.gov.

A Hurricane Watch means that hurricane conditions are possible
within the watch area. A watch is typically issued 48 hours
before the anticipated first occurrence of tropical-storm-force
winds, conditions that make outside preparations difficult or
dangerous.

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, generally within 48 hours.

Interests in southwestern Louisiana should continue to monitor the
progress of this system.

For storm information specific to your area in the United
States, including possible inland watches and warnings, please
monitor products issued by your local National Weather Service
forecast office. For storm information specific to your area outside
the United States, please monitor products issued by your national
meteorological service.

 

DISCUSSION AND 48-HOUR OUTLOOK
——————————
At 700 PM CDT (0000 UTC), the center of Tropical Depression Harvey
was located near latitude 21.7 North, longitude 92.5 West. The
depression is moving erratically toward the northwest near 2 mph (4
km/h). A track toward the northwest or north-northwest at a faster
forward speed is expected for the next 48 hours. On the forecast
track, Harvey should be approaching the Texas coast late Friday.

Reports from an Air Force Reserve Hurricane Hunter aircraft
indicate that maximum sustained winds remain near 35 mph (55 km/h)
with higher gusts. Some strengthening is forecast during the next
48 hours, and Harvey could become a tropical storm later tonight
and a hurricane on Friday.

The minimum central pressure estimated from the Hurricane Hunter
aircraft data and Mexican surface observations is 1003 mb
(29.62 inches).

 

HAZARDS AFFECTING LAND
———————-
RAINFALL: Harvey is expected to produce total rain accumulations of
10 to 15 inches with isolated maximum amounts of 20 inches over the
middle and upper Texas coast and southwest Louisiana through next
Tuesday, with heavy rainfall beginning as early as Friday morning.
Harvey is also expected to produce total rain accumulations of 3 to
9 inches in portions of south, central, and northeast Texas and the
rest of the lower Mississippi Valley. Rainfall from Harvey could
cause life-threatening flooding.

STORM SURGE: The combination of a dangerous storm surge and the
tide will cause normally dry areas near the coast to be flooded by
rising waters moving inland from the shoreline. The water is
expected to reach the following heights above ground if the peak
surge occurs at the time of high tide…

Port Mansfield to High Island…4 to 6 ft

The deepest water will occur along the immediate coast near and to
the northeast of the landfall location, where the surge will be
accompanied by large and destructive waves. Surge-related flooding
depends on the relative timing of the surge and the tidal cycle, and
can vary greatly over short distances. For information specific to
your area, please see products issued by your local National Weather
Service forecast office.

WIND: Hurricane conditions are possible within the hurricane watch
area by late Friday, with tropical storm conditions possible by
early Friday.

SURF: Swells generated by Harvey are likely to affect the Texas,
Louisiana, and northeast Mexico coasts by Friday. These swells are
likely to cause life-threatening surf and rip current conditions.
Please consult products from your local weather office.

 

NEXT ADVISORY
————-
Next complete advisory at 1000 PM CDT.


TROPICAL DEPRESSION HARVEY FORECAST/ADVISORY NUMBER 13
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017
2100 UTC WED AUG 23 2017

CHANGES IN WATCHES AND WARNINGS WITH THIS ADVISORY…

NONE.

SUMMARY OF WATCHES AND WARNINGS IN EFFECT…

A STORM SURGE WATCH IS IN EFFECT FOR…
* PORT MANSFIELD TO HIGH ISLAND

A HURRICANE WATCH IS IN EFFECT FOR…
* NORTH OF PORT MANSFIELD TO SAN LUIS PASS

A TROPICAL STORM WATCH IS IN EFFECT FOR…
* BOCA DE CATAN MEXICO TO PORT MANSFIELD TEXAS
* NORTH OF SAN LUIS PASS TO HIGH ISLAND

A STORM SURGE WATCH MEANS THERE IS A POSSIBILITY OF LIFE-
THREATENING INUNDATION… FROM RISING WATER MOVING INLAND FROM THE
COASTLINE…IN THE INDICATED LOCATIONS DURING THE NEXT 48 HOURS.
FOR A DEPICTION OF AREAS AT RISK…PLEASE SEE THE NATIONAL WEATHER
SERVICE STORM SURGE WATCH/WARNING GRAPHIC…AVAILABLE AT
HURRICANES.GOV.

A HURRICANE WATCH MEANS THAT HURRICANE CONDITIONS ARE POSSIBLE
WITHIN THE WATCH AREA. A WATCH IS TYPICALLY ISSUED 48 HOURS
BEFORE THE ANTICIPATED FIRST OCCURRENCE OF TROPICAL-STORM-FORCE
WINDS…CONDITIONS THAT MAKE OUTSIDE PREPARATIONS DIFFICULT OR
DANGEROUS.

A TROPICAL STORM WATCH MEANS THAT TROPICAL STORM CONDITIONS ARE
POSSIBLE WITHIN THE WATCH AREA…GENERALLY WITHIN 48 HOURS.

INTERESTS IN SOUTHWESTERN LOUISIANA SHOULD CONTINUE TO MONITOR THE
PROGRESS OF THIS SYSTEM.

TROPICAL DEPRESSION CENTER LOCATED NEAR 21.6N 92.6W AT 23/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE NORTHWEST OR 320 DEGREES AT 2 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT…CENTER LOCATED NEAR 21.6N 92.6W AT 23/2100Z
AT 23/1800Z CENTER WAS LOCATED NEAR 21.5N 92.5W

FORECAST VALID 24/0600Z 22.4N 93.0W
MAX WIND 35 KT…GUSTS 45 KT.
34 KT… 60NE 0SE 0SW 0NW.

FORECAST VALID 24/1800Z 23.8N 93.9W
MAX WIND 40 KT…GUSTS 50 KT.
34 KT… 70NE 50SE 30SW 50NW.

FORECAST VALID 25/0600Z 25.1N 95.2W
MAX WIND 50 KT…GUSTS 60 KT.
50 KT… 40NE 0SE 0SW 0NW.
34 KT… 90NE 70SE 40SW 60NW.

FORECAST VALID 25/1800Z 26.4N 96.3W
MAX WIND 60 KT…GUSTS 75 KT.
50 KT… 50NE 40SE 20SW 30NW.
34 KT…120NE 90SE 50SW 80NW.

FORECAST VALID 26/1800Z 28.6N 97.3W…INLAND
MAX WIND 50 KT…GUSTS 60 KT.
50 KT… 0NE 30SE 0SW 0NW.
34 KT… 60NE 90SE 30SW 30NW.

EXTENDED OUTLOOK. NOTE…ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5…AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 27/1800Z 29.0N 97.3W…INLAND
MAX WIND 35 KT…GUSTS 45 KT.

OUTLOOK VALID 28/1800Z 29.0N 96.5W…INLAND
MAX WIND 35 KT…GUSTS 45 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 21.6N 92.6W

211729_5day_cone_no_line_and_wind

TCDAT4

Tropical Depression Harvey Discussion Number 13
NWS National Hurricane Center Miami FL AL092017
400 PM CDT Wed Aug 23 2017

High-resolution visible satellite images show that the cloud pattern
of Harvey is a little better organized than it was this morning, but
the system lacks distinct banding features. Surface synoptic
observations, ASCAT data, and Dvorak classifications from TAFB and
SAB indicated that the cyclone has not strengthened, so the current
intensity is held at 30 kt. The global models predict that an
upper-level low over the northwest Gulf of Mexico will essentially
dissipate in a day or so. Therefore, Harvey is expected to remain
in a relatively low-shear environment up to the Texas coast.
Moreover, ocean analyses show that a warm eddy that broke off from
the Loop Current has drifted westward across the Gulf to a location
near the projected path of Harvey. This would also be conducive to
strengthening, so it is likely that the system will become a
hurricane prior to landfall, although this is not explicitly shown
in the NHC forecast for which landfall is indicated between 48 and
72 hours.

Based on the scatterometer data and geostationary satellite fixes
the center hasn’t moved much this afternoon, although recent imagery
suggests a northwestward drift at about 320/2 kt. A weak mid-level
ridge to the northeast of Harvey should cause the cyclone to move
on a northwestward or north-northwestward track through 48 hours.
Later, steering currents weaken as a ridge builds over the
southwestern United States and a trough drops down from the Plains.
As a result, Harvey should decelerate while making landfall and
move very slowly just inland of the coast. Some of the track
guidance models, such as the HWRF, have shifted southwestward in
comparison to their previous run. The official track forecast is
very close to the previous one through 48 hours and is a little
slower and to the west after that time. This is very close to the
latest dynamical model consensus, TVCN. It should be noted that
synoptic surveillance data are currently being collected by the NOAA
G-IV jet aircraft and these data will be assimilated into, and
hopefully improve the forecasts by, the global models.

Key Messages:

1. Harvey is likely to bring multiple hazards, including heavy
rainfall, storm surge, and possible hurricane conditions to portions
of the Texas coast beginning on Friday.

2. Heavy rainfall is likely to spread across portions of eastern
Texas, Louisiana, and the lower Mississippi Valley from Friday
through early next week and could cause life-threatening flooding.
Please refer to products from your local National Weather Service
office and the NOAA Weather Prediction Center for more information
on the flooding hazard.

3. A Storm Surge Watch is in effect from Port Mansfield to High
Island, Texas, indicating the possibility of life-threatening
inundation from rising water moving inland from the coast during the
next 48 hours. For a depiction of areas at risk, see the Storm
Surge Watch/Warning Graphic at hurricanes.gov.

4. The Potential Storm Surge Flooding Map is available on the NHC
website. This product depicts a reasonable worst-case scenario –
the amount of inundation that has a 10 percent chance of being
exceeded at each individual location. Because the Flooding Map is
based on inputs that extend out only to about 72 hours, it best
represents the flooding potential in those locations within the
watch area.

FORECAST POSITIONS AND MAX WINDS

INIT 23/2100Z 21.6N 92.6W 30 KT 35 MPH
12H 24/0600Z 22.4N 93.0W 35 KT 40 MPH
24H 24/1800Z 23.8N 93.9W 40 KT 45 MPH
36H 25/0600Z 25.1N 95.2W 50 KT 60 MPH
48H 25/1800Z 26.4N 96.3W 60 KT 70 MPH
72H 26/1800Z 28.6N 97.3W 50 KT 60 MPH…INLAND
96H 27/1800Z 29.0N 97.3W 35 KT 40 MPH…INLAND
120H 28/1800Z 29.0N 96.5W 35 KT 40 MPH…INLAND211729_earliest_reasonable_toa_no_wsp_34

 

http://www.nhc.noaa.gov/refresh/graphics_at4+shtml/211729.shtml?gm_track#contents

http://www.nhc.noaa.gov/refresh/graphics_at4+shtml/211729.shtml?wsurge#contents

 

The top-2 links are very informative and for people along those areas, these links might be very useful to you.

GMZ001-240845-  Synopsis for the Gulf of Mexico  434 PM EDT Wed Aug 23 2017      .SYNOPSIS…Tropical Depression Harvey is centered near 21.6N  92.6W at 5 PM EDT, moving NW, or 312 degrees at 2 kt. Maximum  sustained winds are 30 kt gusting to 40 kt. Harvey is forecast  to intensify to tropical storm strength this evening, moving  inland over southern Texas Friday night.    $$


GMZ011-240845-  NW Gulf including Stetson Bank-  434 PM EDT Wed Aug 23 2017

 TROPICAL STORM WARNING    TONIGHT  E winds 10 to 15 kt. Seas 4 to 5 ft.  THU  NE to E winds 20 to 25 kt. Seas 5 ft, building to 11 ft  in the afternoon. Scattered showers and isolated thunderstorms.

 THU NIGHT   TROPICAL STORM CONDITIONS EXPECTED. E winds 25 to  30 kt,increasing to 35 to 40 kt late. Seas 17 ft, building to 24  ft late. Scattered showers and isolated thunderstorms. FRI   TROPICAL STORM CONDITIONS EXPECTED. SE winds 45 to 55  kt. Seas 22 to 27 ft. Scattered showers and isolated  thunderstorms.

 FRI NIGHT   TROPICAL STORM CONDITIONS POSSIBLE. SE to S winds  45 to 55 kt. Seas 18 ft, subsiding to 13 ft late.  Scattered showers and isolated thunderstorms.

 SAT   TROPICAL STORM CONDITIONS POSSIBLE.  

SAT NIGHT   TROPICAL STORM CONDITIONS POSSIBLE.

 SUN  S winds 20 to 25 kt. Seas 7 ft.

 SUN NIGHT   TROPICAL STORM CONDITIONS POSSIBLE.

 MON NIGHT  SW to W winds 20 to 25 kt. Seas 6 to 8 ft.

 

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More fun With Harvey

Ole Harvery is a stubborn and vexing system.   I like the caveat “In any case, it will cause heavy rain”.   Captain Obious has that right. lol.    The heavy rain-maker is a given anyhow.    Oddly enough there has been some Anti-Cyclonic in the Central Gulf of Mexico.

With some of that cloudiness disappearing and convection being to fire up, it is something to be mindful of. Harvey will experience some drag over the Yucatan Peninsula.   It’s strength and trajectory in the next 1-2 days will affect this sys

I am still leaning towards a strong Tropical Wave or System (depression)  Maybe  it needs an SSRI. Smh.

Disturbance two will form over Florida and most of that will veer away causing only winds, rains and high surf.

two_atl_2d0 (23)

Tropical Weather Outlook
NWS National Hurricane Center Miami FL
800 AM EDT Tue Aug 22 2017

For the North Atlantic…Caribbean Sea and the Gulf of Mexico:

1. Disorganized showers and thunderstorms over the Yucatan Peninsula
and adjacent water areas are associated with the remnants of Harvey.
Environmental conditions are expected to be conducive for
development when the system moves over the Bay of Campeche tonight,
and a tropical depression is expected to form over the southwestern
Gulf of Mexico on Wednesday or Thursday. Regardless of development,
locally heavy rainfall and gusty winds are expected to spread
westward across Belize and the Yucatan Peninsula during the next day
or so. Interests in northeastern Mexico and along the Texas coast
should monitor the progress of this system.
* Formation chance through 48 hours…high…70 percent.
* Formation chance through 5 days…high…90 percent.

2. Shower and thunderstorm activity associated with a broad trough of
low pressure near the northwestern Bahamas remains limited. Any
development of this system during the next few days should be slow
to occur while it moves west-northwestward, and then turns
northwestward or northward near Florida and the adjacent waters.
Environmental conditions could become a little more conducive for
development by the weekend when the system begins to move
northeastward over the western Atlantic.
* Formation chance through 48 hours…low…10 percent.
* Formation chance through 5 days…low…30 percent.


Tropical Weather Discussion
NWS National Hurricane Center Miami FL
638 AM EDT Tue Aug 22 2017

Tropical Weather Discussion for North America, Central America
Gulf of Mexico, Caribbean Sea, northern sections of South
America, and Atlantic Ocean to the African coast from the
Equator to 32N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.

Based on 0600 UTC surface analysis and satellite imagery through 
1015 UTC.

...SPECIAL FEATURES...

A tropical wave extends from 24N87W to 13N88W moving W-NW at 
10-15 kt. The remnant circulation of Harvey continues to be 
analyzed as a 1011 mb low pressure along the wave axis near 
18N88W. Scattered moderate to isolated strong convection is from 
18N-23N between 79W-89W. Satellite images and surface 
observations indicates the low is along the coast of N Belize. 
Tropical cyclone development is expected when the system moves 
over the Bay of Campeche tonight or early Wednesday, and a 
tropical depression is likely to form over the southwestern Gulf 
of Mexico on Wednesday or Thursday. Regardless of development, 
locally heavy rainfall and gusty winds are expected to spread 
westward across Belize and the Yucatan peninsula during the next 
day or so. There is a high chance for this system to become a 
tropical cyclone within 48 hours. 

...TROPICAL WAVES...

A tropical wave extends from 24N29W to 10N32W moving W at 15-20 
kt. A 1011 mb low pressure precedes the wave centered near 
12N38W. Scattered moderate convection is from 09N-14N between 
25W-33W. This wave in a moist area based on TPW imagery and has a
well pronounced 700 mb trough.

A tropical wave extends from Puerto Rico near 19N67W to Venezuela
near 10N68W, moving W at 20-25 kt. Isolated showers are within 120
nm of the wave axis. Subtle troughing is noted on 700 mb streamline
analysis. Some moisture is observed on either side of the wave 
axis based on the SSMI TPW animation. This wave will cross the 
central Caribbean through mid-week.

...ITCZ/MONSOON TROUGH...

The monsoon trough extends from 18N16W to 18N27W to 12N38W to 
07N42W to 07N46W. The Intertropical Convergence Zone axis 
continues from 07N46W to 06N58W. Besides the convection mentioned
in the tropical wave section, scattered moderate to isolated
strong convection is along the coast of W Africa from 08N-14N 
between 12W-17W. Isolated moderate convection is from 05N-08N 
between 35W-43W.

...DISCUSSION...

GULF OF MEXICO...

Weak surface ridging is over the Gulf of Mexico with axis along
30N. 10-15 kt easterly surface flow is over the N Gulf. The
northern extent of a tropical wave is producing scattered moderate
to isolated strong convection over the SE Gulf of Mexico, Yucatan
Channel, and the N Yucatan Peninsula. Scattered showers and 
isolated thunderstorms are also advecting over S Florida from the 
Atlantic. In the upper levels, an upper level low is centered over
the W Gulf near 27N91W enhancing showers. Expect over the next 24
hours for the upper level low to remain quasi-stationary and 
continue to produce showers. Looking ahead, the remnant low of 
Harvey and tropical wave, will traverse the Yucatan Peninsula 
today, and then move into the Bay of Campeche Wednesday, where 
redevelopment to a tropical cyclone appears likely.

CARIBBEAN SEA...

The remnant low of Harvey currently located over N Belize continues
to be the primary area of concern across the basin. Please, see 
Special Features section for more details. A tropical wave is over
the eastern Caribbean. Please, see the Tropical Waves section for
details. Patches of low-level moisture embedded in the trade wind
flow are noted over parts of the east and central Caribbean. 
Fresh SE winds are observed per scatterometer data across the 
central Caribbean, but mainly N of 13N. These winds are the result
of the pressure gradient between the Atlantic ridge and the 
remnant low of Harvey. 

...HISPANIOLA...

Presently, showers are over SW Haiti. However,daytime heating, 
local sea breezes and mountain upslope lifting will combined with 
available moisture to produce scattered showers and thunderstorms
during the afternoon and evening hours today. The next tropical 
wave is forecast to pass just south of the island tonight into 
Wednesday.

ATLANTIC OCEAN...

A trough of low pressure continues to move westward across the
Bahamas and now extends from 29N77W across the N Bahamas to
central Cuba near 22N79W. This system continues to produce 
disorganized showers and thunderstorms, with fresh to strong winds
mainly on its NW side based on scatterometer data. Only slow 
development of this system is anticipated today while it moves 
west-northwestward towards Florida. Farther east, there is 
another surface trough that extends 24N55W to 16N55W. Scattered
moderate convection is from 23N-25N between 51W-54W. An upper- 
level low is also centered near 27N59W. A 1022 mb high is centered
W of Bermuda near 32N72W. Another 1022 mb high is centered over
the central Atlantic near 32N48W. The tail end of a cold front is
over the E Atlantic from 31N32W to 28N40W. Scattered showers are
within 90 nm of the front.  

two_atl_5d0 (14)

activity_loop (5)

Some of this energy above will result in more thunderstorms and some WILL be severe.

pwtr

300mb

mxth

The bottom-most map over the Southwest shows mixing. The biggest of which will naturally occur near the coastline, where land and sea (mix). When this mixing happens in tandem with forcing,  you have more available moisture and lift.

sfnt (1)

sfnt (1)

Yet again, with Harvey

two_atl_5d0 (13)

This is actually fun.  We see Oceanic  and Gulf of Mexico issues.  We have systems engourging each other.  It seems just as one system gains some validity, it falls apart.

The system has some obvious and important problems.   In 2-5 days an increase (80%) of potentiality is based upon assumption.  Assuming the path is going one place or another really matters.  Interaction with the Yucatan Peninsula and how much of that crossing hits the Yucatan.   Earlier we have projections being a bit more westward,  thus the WSW component is really a best guess.   The Geometry really is hard to pin down.  Like with many projections you can go from 80%-20% and then disappearing altogether.

Looking again at this remnant of Harvey,   we see another interaction with the Yucatan.  We have a presumption of movement and if this system moves as they forecast this  movement could be problematic.  If it goes more westerly then it would basically scratch Belize as it departs the Yucatan.

If it swings more NW and WNW then where would it go? A more southerly turn would make this storm go to Depression heaven.   If this storm faces enough land mass, then the land will make a weak storm weaker.   If it goes between the Yucatan and Mexico then we have to re-work estimates as it crosses un-impeded in the Gulf of Mexico.

Is the environment more favorable in the Gulf?  And where does it end up?  A strong forward track inhibits a turn.  That is good (for us).  This is indeed the trickier proposition.   You see, Emergency Management has a hat in this rodeo and so does Home Depot and Lowes.  We would see a run on Home Depot and Lowes.

Against most important  is life and limb.  EM has a very tight juxtoposition here.  To man shelters and provide as much leeway as they can.  Hurricane or Tropical Force parties are ignorant. You could get holed up in Hotels without electricity.  After the Beer runs out, then the party just begins.   Don’t do that!   Now this is contingent upon path and strength and so it is vitally important that people listen to local TV and Emergency Management.

These are some of the EM difficulties and their’s is a difficult matter.  Only weather men or gals do this (for the most part) but I suggest that you don’t do that.  Even a stronger Tropical Storm can make a   big difference.  The center is really not the issue as much as the Storm’s periphery.

GULFIR172322215

STAY TUNED TO LOCAL ADVISORIES!  Do drive through flooding and avoid the chance of other kinds of problems.

____________________________________________________________________________________________

EM is doing you a favor.  Be mindful of that fact.


 

800 PM EDT Sun Aug 20 2017

For the North Atlantic…Caribbean Sea and the Gulf of Mexico:

1. Data from an Air Force Reserve Hurricane Hunter mission earlier
this afternoon indicated that the remnants of Harvey, located over
the central Caribbean Sea, do not have a well-defined center of
circulation. In addition, the associated shower and thunderstorm
activity remains disorganized and has decreased in coverage and
intensity since earlier in the day. Gradual development of this
system is still possible through Monday night while it moves
west-northwestward at 15 to 20 mph near the coast of Honduras, and
it could become a tropical cyclone again before it reaches the coast
of Belize or the Yucatan Peninsula early Tuesday. The remnants are
expected to move into the Bay of Campeche on Wednesday, where
redevelopment appears more likely due to more favorable upper-level
winds. Interests in northern Nicaragua, Honduras, Belize, and the
Yucatan Peninsula should monitor the progress of this system.
* Formation chance through 48 hours…medium…50 percent.
* Formation chance through 5 days…high…80 percent.

2. A trough of low pressure located about a hundred miles
north-northeast of the Turks and Caicos Islands is producing an
elongated area of disorganized showers and thunderstorms that
extends southeastward toward Puerto Rico and the Virgin Islands.
Environmental conditions are expected to be unfavorable for
development of this system during the next couple of days while it
moves west-northwestward at about 15 mph toward the northern
Bahamas and southern Florida. Conditions could become a little
more conducive for development later in the week when the system is
near Florida or the adjacent waters of the western Atlantic or
eastern Gulf of Mexico.
* Formation chance through 48 hours…low…10 percent.
* Formation chance through 5 days…medium…40 percent.

3. A large area of cloudiness and disorganized thunderstorms located
about 900 miles east-northeast of the northern Leeward Islands is
associated with a trough of low pressure. Upper-level winds are
not conducive for development of this system while it moves
northwestward over the central Atlantic at 10 to 15 mph.
* Formation chance through 48 hours…low…near 0 percent.
* Formation chance through 5 days…low…near 0 percent.


Meteorologist Larry Olson (Mike Scott)atl_00_sfc_analysis

http://www.nhc.noaa.gov/marine/offshores.php

Follow that link to get Marine products.

 

Harvey ?

Harvey has been a tough nut to crack.  First:  Storm Center has been inconsistent and thunderstorm patterns erratic.   So right now the center is anyone’s guess.   These sudden flare-ups of Thunderstorm activity are partly due to convection over-land and sea-breezes.

If anything, circulation is closer to Florida,  with an elongated center.   The system  looks to be just off of  Florida.  The million dollar question is the actual center,  sustained winds and pressure.  There is a bit of Thunderstorm activity  in a cyclonic pattern off the coast of Florida.  Some of that is attributed to Thunderstorm Tops.   But this picture is NOT set at this time.

So for now, the next pressure recording and sustained winds are very importsnt. Florida two clusters of thunderstorms.  Wait, three, my bad.  One is superimposed on another.

GULFWV172321615

GULFVS172321945

http://www.nhc.noaa.gov/gtwo.php?basin=atlc&fdays=2

Jackson-real-estate-investing-1024x683

Heat Advisory

URGENT - WEATHER MESSAGE...UPDATED
National Weather Service Jackson MS
259 PM CDT Sun Aug 20 2017

...HEAT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
210000-
/O.CON.KJAN.HT.Y.0007.000000T0000Z-170821T0000Z/
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar-
Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes-
Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston-
Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper-
Warren-Hinds-Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah-
Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln-
Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Crossett, North Crossett, Hamburg,
West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove,
Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro,
Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof,
Vidalia, Ferriday, West Ferriday, Cleveland, Indianola,
Ruleville, Greenwood, Grenada, Vaiden, North Carrollton,
Carrollton, Winona, Eupora, Maben, Mathiston, West Point,
Columbus, Ackerman, Weir, Starkville, Greenville, Belzoni, Isola,
Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko,
Louisville, Macon, Brooksville, Mayersville, Rolling Fork,
Anguilla, Yazoo City, Ridgeland, Madison, Canton, Carthage,
Philadelphia, Pearl River, De Kalb, Scooba, Vicksburg, Jackson,
Pearl, Brandon, Richland, Forest, Morton, Newton, Union, Decatur,
Conehatta, Meridian, Port Gibson, Crystal Springs, Hazlehurst,
Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Bay Springs,
Heidelberg, Quitman, Stonewall, Shubuta, Fayette, Natchez, Bude,
Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss,
Bassfield, Collins, Mount Olive, Laurel, Columbia,
West Hattiesburg, Lumberton, Purvis, and Hattiesburg
259 PM CDT Sun Aug 20 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* TEMPERATURE...High temperatures in the mid 90s with peak
  afternoon heat index values ranging from 103 to 109 degrees.

* IMPACTS...Heat related illnesses may be possible for those
  outdoors in unshaded areas without proper precautions taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions, if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work, the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency, call 9 1 1.

A Heat Advisory means that a period of hot temperatures is
expected. The combination of hot temperatures and high humidity
will combine to create a situation in which heat illnesses are
possible. Drink plenty of fluids, stay in an air-conditioned
room, stay out of the sun, and check up on relatives and
neighbors.

&&

$$



 

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Jackson MS
258 PM CDT Sun Aug 20 2017

LAZ015-023>026-MSZ026>033-035>039-042>046-048>052-054>066-072>074-
212000-
Richland-Franklin LA-Catahoula-Tensas-Concordia-Grenada-Carroll-
Montgomery-Webster-Clay-Lowndes-Choctaw-Oktibbeha-Humphreys-
Holmes-Attala-Winston-Noxubee-Yazoo-Madison MS-Leake-Neshoba-
Kemper-Hinds-Rankin-Scott-Newton-Lauderdale-Copiah-Simpson-Smith-
Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln-Lawrence-
Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
258 PM CDT Sun Aug 20 2017

This hazardous weather outlook is for portions of northeast
Louisiana and central Mississippi.

.DAY ONE...Tonight and Monday

EXCESSIVE HEAT
THREAT...Elevated
TIMING...Through the remainder of this afternoon

Heat index values ranging from 105-110 degrees will remain
possible through early this evening  Exposure to these conditions
will raise the likelihood of heat related illnesses.

(www.weather.gov/images/jan/graphicast/image1.png)

.DAYS TWO THROUGH SEVEN...Monday night through Saturday

The probability for widespread hazardous weather is low.

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations is not expected through next Saturday.

$$

50

&&

...HAZARD LEGEND...

*EXCESSIVE HEAT*
Extreme...Maximum heat index greater than 110 degrees for 3 or
 more days in a row and/or air temperatures greater than 107
 degrees.
Significant...Maximum heat index greater than 110 degrees
 and/or air temperatures greater than 105 degrees.
Elevated...Maximum heat index 105 to 110 degrees and/or air
 temperatures greater than 103 degrees.
Limited...Maximum heat index near 105 degrees and/or air
 temperatures 100 to 103 degrees.

download (8)

Red Flag Warning

URGENT - FIRE WEATHER MESSAGE
National Weather Service Pocatello ID
203 PM MDT Sun Aug 20 2017

...RED FLAG WARNING IN EFFECT UNTIL 9 PM MDT THIS EVENING FOR
GUSTY WINDS AND LOW HUMIDITY FOR EAST IDAHO FIRE WEATHER ZONES 410
AND 425...

IDZ410-425-210300-
/O.CON.KPIH.FW.W.0011.000000T0000Z-170821T0300Z/
Upper Snake River Valley/Idaho Falls BLM-
Middle Snake River Valley/Twin Falls BLM north of the Snake River-
203 PM MDT Sun Aug 20 2017

...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MDT THIS EVENING
FOR GUSTY WINDS AND LOW HUMIDITY FOR EAST IDAHO FIRE WEATHER
ZONES 410 AND 425...

* AFFECTED AREA... Arco Desert Region of fire weather zone 410.
  Fire weather zone 425.

* WIND...Southwest to West winds 10 to 20 mph with gusts to 30
  mph.

* HUMIDITY...Minimum 9 to 15 percent.

* IMPACTS...Any fires that develop will likely spread rapidly.
  Outdoor burning is not recommended. Do not use fireworks.
  Engine heat from vehicles can spark wildfires, especially in
  grasses. Do not park on or drive over grassy areas or throw
  cigarettes out of cars.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A red flag warning means that critical fire weather conditions
are either occurring now, or will shortly. Fires may experience
rapid rates of growth. Please advise the appropriate officials or
fire crews in the field of the red flag warning for portions of
Southeast Idaho.

images (23)

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Saint Louis MO
356 PM CDT Sun Aug 20 2017

ILZ058>060-064-065-069-070-074-079-095>102-MOZ018-019-026-027-
034>036-041-042-047>052-059>065-072>075-084-085-099-211200-
Greene IL-Macoupin IL-Montgomery IL-Bond IL-Fayette IL-Clinton IL-
Marion IL-Washington IL-Randolph IL-Adams IL-Brown IL-Pike IL-
Calhoun IL-Jersey IL-Madison IL-Saint Clair IL-Monroe IL-Knox MO-
Lewis MO-Shelby MO-Marion MO-Monroe MO-Ralls MO-Pike MO-Boone MO-
Audrain MO-Moniteau MO-Cole MO-Osage MO-Callaway MO-Montgomery MO-
Lincoln MO-Gasconade MO-Warren MO-Saint Charles MO-Franklin MO-
Saint Louis MO-Saint Louis City MO-Jefferson MO-Crawford MO-
Washington MO-Saint Francois MO-Sainte Genevieve MO-Iron MO-
Madison MO-Reynolds MO-
356 PM CDT Sun Aug 20 2017

This hazardous weather outlook is for portions of eastern and
central Missouri as well as west central and southwest Illinois.

.DAY ONE...Tonight

A few strong to severe thunderstorms are possible this evening,
mainly for areas north of Interstate 70, where strong gusty winds
and hail to the size of quarter dollars will be possible.

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Isolated strong to severe thunderstorms will be possible Monday
night for areas north of Interstate 70, and again on Tuesday for
areas south and east of Saint Louis.

 

Where is Harvey?

two_atl_5d0 (12)

Tropical Weather Discussion...UPDATED
NWS National Hurricane Center Miami FL
810 AM EDT Sun Aug 20 2017

Tropical Weather Discussion for North America, Central America
Gulf of Mexico, Caribbean Sea, northern sections of South
America, and Atlantic Ocean to the African coast from the
Equator to 32N. The following information is based on satellite
imagery, weather observations, radar and meteorological analysis.

...UPDATED TO PLACE TROPICAL WAVE IN SPECIAL FEATURES SECTION...

Based on 0600 UTC surface analysis and satellite imagery through 
1030 UTC.

...SPECIAL FEATURES...

A tropical wave extends across the central Caribbean with axis 
extending from 19N72W to a 1008 mb surface low near 14N72W to 
11N73W. This system was previously T.S Harvey. Scattered moderate
convection has developed during the past few hours near the low 
center mainly from 12N-17N between 73W-77W. A fast westward 
motion is expected to continue with this system for the next 
couple of days as the wave moves along the southern periphery of 
the subtropical ridge.

...TROPICAL WAVES...

A tropical wave extends its axis from 20N45W to 10N46W, moving 
west at 15-20 kt. Satellite imagery indicates a large area of 
cloudiness but convection is limited in association with this 
wave due to Saharan dust intrusion. This system coincides with a 
well defined 700 mb trough, and a high amplitude northward bulge 
of moisture is noted on the TPW product.

A tropical wave was introduced to this map over the eastern 
Caribbean, after analyzing upper-air soundings across the islands
and model guidance. The wave's axis extends from 19N65W to 10N64W,
moving west at 10-15 kt. Scattered showers are noted over the
northern portion of the wave mainly north of 16N between 62W-66W
affecting the Leeward Islands, the U.S. Virgin Islands, and Puerto
Rico. 

A tropical wave is over the western Caribbean with axis extending 
from western Cuba along 84W to near 10N84W, moving west at 10-15 
kt. The wave shows up very well on the TPW animation and 700 mb 
streamline analysis. Energy from the wave has fractured to the 
northeast and is analyzed as a surface trough currently located
over the Florida Peninsula. The wave is enhancing showers near
Honduras, Belize and adjacent waters.

...ITCZ/MONSOON TROUGH...

The monsoon trough extends from the African coast near 15N17W to a
1008 mb low near 13N20W to 11N41W. The Intertropical Convergence 
Zone extends from 11N51W to 09N61W. Scattered moderate convection
is observed within 100 nm on either side of the monsoon trough. 

...DISCUSSION...

GULF OF MEXICO...

A large and well defined upper-level low centered over the
southeast Gulf near 25N85W continues to generate scattered 
showers over the Florida Straits. The western half of the Gulf is
under the influence of a surface ridge, anchored by a 1016 mb 
high pressure centered near 29N90W. Isolated showers and light to
gentle anticyclonic winds prevail west of 90W. The upper-low will
drift westward reaching the central Gulf by Monday. This system 
will continue to enhance showers and thunderstorms across the Gulf
waters today.

CARIBBEAN SEA...

Three tropical waves are moving across the basin. Refer to the 
section above for details. Moisture associated with these tropical
waves will continue to affect the area increasing the likelihood 
of showers and thunderstorms today. Scatterometer data depicts
moderate trades across the basin, with the strongest winds
remaining east of 70W. 

...HISPANIOLA...

Daytime heating, local sea breezes, and mountain upslope lifting 
will combine with available moisture to produce scattered showers
and thunderstorms across the island mainly during the afternoon 
and evening hours through the weekend. 

ATLANTIC OCEAN...

As previously mentioned, the northern part of the tropical wave 
currently moving across the western Caribbean is analyzed as a 
trough currently extending across southeast Florida. This trough 
is generating scattered showers and thunderstorms west of 76W, and
will continue to move westward through the day. Another surface 
trough is analyzed northeast of the Leeward Islands extending from
25N65W to 20N65W. This trough continues to produce disorganized 
showers and thunderstorms from 19N-25N between 61W-66W. Environmental
conditions are not expected to be conducive for development of 
this system during the next couple of days while it moves west-
northwestward at 15 to 20 kt. An area of fresh to strong winds is
noted per scatterometer data on the northern side of this trough.
The remainder of the Atlantic is under the influence of a surface
ridge, anchored by a 1023 mb high centered near 32N39W. Fresh to 
strong northerly winds are also noted between the coast of Africa 
and the Madeira/Canary Islands. These winds are the result of the 
pressure gradient between the Atlantic ridge and lower pressures 
over west Africa.


GULFIR172320915
The Central Pressure USA_06Z
Jackson-real-estate-investing-1024x683

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Jackson MS
403 AM CDT Sun Aug 20 2017

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
210915-
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar-
Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes-
Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston-
Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper-
Warren-Hinds-Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah-
Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln-
Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
403 AM CDT Sun Aug 20 2017

This hazardous weather outlook is for portions of southeast
Arkansas, northeast Louisiana, central Mississippi, north central
Mississippi, and south central Mississippi.

.DAY ONE...Today and Tonight

EXCESSIVE HEAT
THREAT...Elevated
TIMING...Today

Temperatures in the mid to upper 90s are expected to combine with
dewpoints in the mid to upper 70s on Sunday. This will result in
heat index values ranging from 105-110 degrees from 11AM til 7PM.
Exposure to these conditions will raise the likelihood of heat
related illnesses.

(www.weather.gov/images/jan/graphicast/image1.png)

.DAYS TWO THROUGH SEVEN...Monday through Saturday

Maximum heat index values near 105 degrees are possible in the
Delta region on Monday. Prolonged exposure to these temperatures
or strenuous outdoor activities could be dangerous.

(www.weather.gov/images/jan/graphicast/image2.png)

.SPOTTER CALL TO ACTION STATEMENT...
The activation of storm spotters, HAM radio operators, and
emergency management personnel in support of severe weather
operations is not expected through next Saturday.

$$

3

&&

...HAZARD LEGEND...

*EXCESSIVE HEAT*
Extreme...Maximum heat index greater than 110 degrees for 3 or
 more days in a row and/or air temperatures greater than 107
 degrees.
Significant...Maximum heat index greater than 110 degrees
 and/or air temperatures greater than 105 degrees.
Elevated...Maximum heat index 105 to 110 degrees and/or air
 temperatures greater than 103 degrees.
Limited...Maximum heat index near 105 degrees and/or air
 temperatures 100 to 103 degrees.


...USEFUL WEATHER WEB PAGES (URLS)...

NWS JAN Home page...
   www.weather.gov/jan
Stay Aware, Stay Safe NWS JAN Briefing Page...
   www.weather.gov/jan/safe
Latest Weather Briefing...
   www.weather.gov/jan/weather_briefing

Tropical page...
   www.weather.gov/jan/tropical
National Hurricane Center Home Page...
   www.nhc.noaa.gov/
Find NWS JAN on Facebook...
   www.facebook.com/NWSJacksonMS
Follow NWS JAN on Twitter...
   @NWSJacksonMS
Follow NWS JAN on Youtube...
   www.youtube.com/user/NWSJacksonMiss




Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Jackson MS
914 AM CDT Sun Aug 20 2017

...HEAT ADVISORY IN EFFECT THROUGH THIS AFTERNOON...

ARZ074-075-LAZ007>009-015-016-023>026-MSZ018-019-025>066-072>074-
202215-
/O.CON.KJAN.HT.Y.0007.000000T0000Z-170821T0000Z/
Ashley-Chicot-Morehouse-West Carroll-East Carroll-Richland-
Madison LA-Franklin LA-Catahoula-Tensas-Concordia-Bolivar-
Sunflower-Leflore-Grenada-Carroll-Montgomery-Webster-Clay-Lowndes-
Choctaw-Oktibbeha-Washington-Humphreys-Holmes-Attala-Winston-
Noxubee-Issaquena-Sharkey-Yazoo-Madison MS-Leake-Neshoba-Kemper-
Warren-Hinds-Rankin-Scott-Newton-Lauderdale-Claiborne-Copiah-
Simpson-Smith-Jasper-Clarke-Jefferson-Adams-Franklin MS-Lincoln-
Lawrence-Jefferson Davis-Covington-Jones-Marion-Lamar-Forrest-
Including the cities of Crossett, North Crossett, Hamburg,
West Crossett, Dermott, Lake Village, Eudora, Bastrop, Oak Grove,
Epps, Lake Providence, Rayville, Delhi, Tallulah, Winnsboro,
Jonesville, Harrisonburg, Newellton, St. Joseph, Waterproof,
Vidalia, Ferriday, West Ferriday, Cleveland, Indianola,
Ruleville, Greenwood, Grenada, Vaiden, North Carrollton,
Carrollton, Winona, Eupora, Maben, Mathiston, West Point,
Columbus, Ackerman, Weir, Starkville, Greenville, Belzoni, Isola,
Durant, Tchula, Lexington, Pickens, Goodman, Kosciusko,
Louisville, Macon, Brooksville, Mayersville, Rolling Fork,
Anguilla, Yazoo City, Ridgeland, Madison, Canton, Carthage,
Philadelphia, Pearl River, De Kalb, Scooba, Vicksburg, Jackson,
Pearl, Brandon, Richland, Forest, Morton, Newton, Union, Decatur,
Conehatta, Meridian, Port Gibson, Crystal Springs, Hazlehurst,
Wesson, Magee, Mendenhall, Taylorsville, Raleigh, Bay Springs,
Heidelberg, Quitman, Stonewall, Shubuta, Fayette, Natchez, Bude,
Roxie, Meadville, Brookhaven, Monticello, New Hebron, Prentiss,
Bassfield, Collins, Mount Olive, Laurel, Columbia,
West Hattiesburg, Lumberton, Purvis, and Hattiesburg
914 AM CDT Sun Aug 20 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* TEMPERATURE...High temperatures in the mid 90s with peak
  afternoon heat index values ranging from 103 to 109 degrees.

* IMPACTS...Heat related illnesses may be possible for those
  outdoors in unshaded areas without proper precautions taken.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions, if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work, the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency, call 9 1 1.

A Heat Advisory means that a period of hot temperatures is
expected. The combination of hot temperatures and high humidity
will combine to create a situation in which heat illnesses are
possible. Drink plenty of fluids, stay in an air-conditioned
room, stay out of the sun, and check up on relatives and
neighbors.

images (25)

Hazardous Weather Outlook

Hazardous Weather Outlook
National Weather Service Shreveport LA
609 AM CDT Sun Aug 20 2017

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ097-112-126-137-138-150>153-165>167-211100-
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Cass-Marion-Gregg-
Harrison-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-
609 AM CDT Sun Aug 20 2017

This Hazardous Weather Outlook is for portions of south central
Arkansas, southwest Arkansas, north central Louisiana, northwest
Louisiana, southeast Oklahoma, east Texas and northeast Texas.

.DAY ONE...Today and Tonight...

Daytime temperatures in the upper 90s to near 100 degrees will
combine with high humidity values today to produce heat index
values of 105 to 110 degrees. Therefore, a Heat Advisory is in
effect until early this evening. In addition, a couple of isolated
thunderstorms are possible, especially south of Interstate 20. No
severe weather is expected at this time.

.DAYS TWO THROUGH SEVEN...Monday through Saturday...

Thunderstorms will remain possible each day through much of the
next week. Thunderstorms are expected areawide on Wednesday.

Heat index values will continue to range between 105 and 109
degrees across portions of the area through Wednesday. Cooler
temperatures and lower heat index values are expected after a cold
front moves across the area on Wednesday. Precautions should be
taken to prevent heat related injuries.

.SPOTTER INFORMATION STATEMENT...

Activation of emergency managers, skywarn networks, and amateur
radio operators is not anticipated through tonight.

$$



Heat Advisory

URGENT - WEATHER MESSAGE
National Weather Service Shreveport LA
353 AM CDT Sun Aug 20 2017

...Heat Advisory Remains in Effect Today for Southeast Oklahoma,
Northwest and North Central Louisiana, Southwest and South Central
Arkansas, and parts of East and Northeast Texas...

.The combination of high temperatures in the middle and upper
nineties along with high humidity will result in heat indices of
105 to 109 degrees from this afternoon through early this
evening.

ARZ050-051-059>061-070>073-LAZ001>006-010>014-017>022-OKZ077-
TXZ097-112-126-137-138-150>153-165>167-210000-
/O.CON.KSHV.HT.Y.0009.000000T0000Z-170821T0000Z/
Sevier-Howard-Little River-Hempstead-Nevada-Miller-Lafayette-
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-
Grant-Caldwell-La Salle-McCurtain-Bowie-Cass-Marion-Gregg-
Harrison-Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-
Including the cities of De Queen, Nashville, Mineral Springs,
Dierks, Ashdown, Hope, Prescott, Texarkana, Stamps, Lewisville,
Bradley, Magnolia, El Dorado, Shreveport, Bossier City, Minden,
Springhill, Homer, Haynesville, Ruston, Farmerville, Bernice,
Mansfield, Stonewall, Logansport, Coushatta, Martin, Arcadia,
Ringgold, Gibsland, Jonesboro, Monroe, Many, Zwolle,
Pleasant Hill, Natchitoches, Winnfield, Colfax, Montgomery,
Dry Prong, Clarks, Grayson, Columbia, Jena, Midway, Olla, Idabel,
Broken Bow, Atlanta, Linden, Hughes Springs, Queen City,
Jefferson, Longview, Marshall, Henderson, Carthage, Nacogdoches,
Center, Lufkin, San Augustine, Hemphill, and Pineland
353 AM CDT Sun Aug 20 2017

...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING...

* EVENT...High pressure aloft across the area will allow for
  temperatures to climb into the middle to upper nineties. These
  temperatures along with low level moisture will produce heat
  indices of 105 to 109 degrees.

* TIMING...Heat indices will be near 105 to 109 in the afternoon
  and early evening before lowering.

* IMPACT...Precautions should be taken to prevent heat related
  illnesses, including limiting outdoor work activities to the
  morning before temperatures rise and early evening after the
  readings lower.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take extra precautions if you work or spend time outside. When
possible, reschedule strenuous activities to early morning or
evening. Take frequent rest breaks in shaded or air conditioned
environments. Know the signs and symptoms of heat exhaustion and
heat stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

Heat stroke is an emergency, call 9 1 1.

A heat advisory means that a period of hot temperatures is
expected. The combination of hot temperatures and high humidity
will combine to create a situation in which heat illnesses are
possible. Drink plenty of fluids, stay in an air-conditioned
room, stay out of the sun, and check up on relatives and
neighbors.

A Tale of Depression

Again this situation was simple last night.  The center is hard to find, even now.  Satellite Imagery shows a lot of rain on one side or the other.    So a wave makes sense , and with the storm now having sustained winds at 35mph.   Plenty of shear and central pressure has risen to 1007mb.   They are trying to make an omelet without the egg.

Meteorologist Larry Olson (Mike Scott)

activity_loop (4)

 

Tropical Depression Harvey Discussion Number 10
NWS National Hurricane Center Miami FL AL092017
500 PM EDT Sat Aug 19 2017

The cloud pattern of Harvey has continued to decay during the day,
at least in part due to 15-20 kt of northerly shear. The convective
area near the center is neither very concentrated or curved, and
overall the pattern more resembles that of an open wave than a
tropical cyclone. Based on the decay and data from the aircraft
mission this morning, the cyclone is downgraded to a tropical
depression. Another Air Force Reserve Hurricane Hunter aircraft
will investigate the system this evening to see if the circulation
still exists.

The intensity forecast is problematic. The current shear should
subside over the next 24 h, and the statistical guidance responds
to this by forecasting significant strengthening. On the other
hand, the structure of the cyclone has decayed to the point where
it may not be able to take advantage of the better environment, as
suggested by the ECMWF and GFS. The intensity forecast follows the
trend of the previous forecast, albeit with lower intensities, in
showing gradual strengthening until landfall in Belize or Yucatan.
However, an alternative forecast scenario is that the system
degenerates to an open wave and is unable to regenerate during the
next 72 h.

The initial motion remains 275/19. There is no change in the
forecast philosophy from the previous advisory, and there are only
minor tweaks to the forecast track. A low- to mid-level ridge
extending across the western Atlantic should keep Harvey, or its
remnants, on a fast westward course across the Caribbean Sea for the
next 36 h. Thereafter, there should be a weakness in the ridge north
of Harvey caused by a strong mid/upper-level low currently seen in
water vapor imagery over the Gulf of Mexico. This pattern should
cause a turn toward the west-northwest and a decrease in forward
speed. The track guidance remains in good agreement that Harvey
should pass near or just north of northeastern Honduras, and then
cross Belize and/or the Yucatan Peninsula into the Bay of Campeche.

A Tropical Storm Watch could be required for portions of the
northern coast of Honduras and northeastern Nicaragua tonight. At
the present time, there is enough uncertainty about whether Harvey
will actually be a tropical storm in 48 h that a watch is not
warranted.

FORECAST POSITIONS AND MAX WINDS

INIT 19/2100Z 14.1N 70.0W 30 KT 35 MPH
12H 20/0600Z 14.3N 73.0W 30 KT 35 MPH
24H 20/1800Z 14.6N 77.0W 35 KT 40 MPH
36H 21/0600Z 15.2N 80.5W 40 KT 45 MPH
48H 21/1800Z 16.0N 83.8W 45 KT 50 MPH
72H 22/1800Z 18.0N 89.0W 45 KT 50 MPH…INLAND
96H 23/1800Z 19.0N 92.0W 30 KT 35 MPH…OVER WATER
120H 24/1800Z 19.5N 94.0W 40 KT 45 MPH


 

TROPICAL DEPRESSION HARVEY FORECAST/ADVISORY NUMBER 10
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017
2100 UTC SAT AUG 19 2017

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

INTERESTS IN THE CENTRAL AND WESTERN CARIBBEAN SEA…NORTHERN
NICARAGUA…NORTHERN HONDURAS…BELIZE…AND THE YUCATAN PENINSULA
OF MEXICO SHOULD MONITOR THE PROGRESS OF HARVEY. WATCHES MAY BE
REQUIRED FOR PORTIONS OF THESE AREAS TONIGHT.

TROPICAL DEPRESSION CENTER LOCATED NEAR 14.1N 70.0W AT 19/2100Z
POSITION ACCURATE WITHIN 30 NM

PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 19 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1007 MB
MAX SUSTAINED WINDS 30 KT WITH GUSTS TO 40 KT.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT…CENTER LOCATED NEAR 14.1N 70.0W AT 19/2100Z
AT 19/1800Z CENTER WAS LOCATED NEAR 14.0N 69.0W

FORECAST VALID 20/0600Z 14.3N 73.0W
MAX WIND 30 KT…GUSTS 40 KT.

FORECAST VALID 20/1800Z 14.6N 77.0W
MAX WIND 35 KT…GUSTS 45 KT.
34 KT… 60NE 0SE 0SW 60NW.

FORECAST VALID 21/0600Z 15.2N 80.5W
MAX WIND 40 KT…GUSTS 50 KT.
34 KT… 60NE 0SE 0SW 60NW.

FORECAST VALID 21/1800Z 16.0N 83.8W
MAX WIND 45 KT…GUSTS 55 KT.
34 KT… 70NE 0SE 0SW 70NW.

FORECAST VALID 22/1800Z 18.0N 89.0W…INLAND
MAX WIND 45 KT…GUSTS 55 KT.
34 KT… 90NE 30SE 40SW 60NW.

EXTENDED OUTLOOK. NOTE…ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5…AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 23/1800Z 19.0N 92.0W…OVER WATER
MAX WIND 30 KT…GUSTS 40 KT.

OUTLOOK VALID 24/1800Z 19.5N 94.0W
MAX WIND 40 KT…GUSTS 50 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 14.1N 70.0W

NEXT ADVISORY AT 20/0300Z


GULFIR172311745

203938_5day_cone_no_line_and_wind

Trouble in the Tropics?

The Yucatan Peninsula is where Tropical Storm Harvey  will first encounter land.   And  as it does it will weaken.  It is only a bland tropical system as is.  Any interaction with land will weaken it, but trajectory is a huge issue.  Crossing the Peninsula diagonally is best for everyone but those who see significant swells, a few winds and perhap torrential rains.  I am not saying that it is good news for Southern Texas to Lake Carles, LA.

204351_5day_cone_no_line_and_wind

As the 5PM REPORT Came out,  the diagonal path seems to write a different story from above.  There are two considerations.  The strength and its path.   I think perhaps the question is that the system is still only a rather weak TS and any encounter with land may cause it to weaken even further

Strongly feel that this storm may be downgraded and stay a Tropical Depression.  If it does reach TS again,  then something atypical would happening.  Apart from that, little change is expected, as per me.

 

Tropical Storm Harvey Discussion Number 6
NWS National Hurricane Center Miami FL AL092017
500 PM AST Fri Aug 18 2017

Again, there has been little change in the structure of Harvey,
with the low-level center near the eastern edge of a strong, but
poorly organized, convective area. Earlier reports from an Air
Force Reserve Hurricane Hunter aircraft included winds suggesting
an increased intensity. However, due to uncertainties in how
representative these measurements were, no appreciable change in
the central pressure, and no improvement in the structure, the
initial intensity is held at 35 kt.

The initial motion is 275/18. A strong low- to mid-level ridge
north of the cyclone should keep Harvey on this general motion
for the next 3 days or so, with the system moving from the eastern
to the western Caribbean Sea during this time. After 72 h, a
west-northwestward motion with a decrease in forward speed is
expected when Harvey passes near or over portions of Central
America, the Yucatan Peninsula, and eastern Mexico. The new
forecast track is a little faster then the previous track, but
there were only minor changes in the direction. It should be noted
that there is considerable uncertainty about how far north Harvey
might get over the Bay of Campeche, with several of the large-scale
models not bringing the center back over the water on the latest
runs.

The current shear should persist for about the next 48 h, and
thus the intensity forecast continues the trend of slow
strengthening during this time. However, the GFS and ECMWF again
forecast Harvey to degenerate to an open wave during this time, and
the rest of the intensity guidance has trended toward a weaker
cyclone. This lowers the confidence in intensification. After
48 h, conditions appear more favorable for strengthening, with the
main uncertainty being how much land Harvey will encounter. The
intensity forecast will again call for a peak intensity of 60 kt in
72 h, followed by weakening due to land interaction.

 

FORECAST POSITIONS AND MAX WINDS

INIT 18/2100Z 13.4N 62.9W 35 KT 40 MPH
12H 19/0600Z 13.6N 65.7W 35 KT 40 MPH
24H 19/1800Z 13.9N 69.3W 40 KT 45 MPH
36H 20/0600Z 14.2N 73.0W 40 KT 45 MPH
48H 20/1800Z 14.5N 76.7W 45 KT 50 MPH
72H 21/1800Z 15.5N 83.5W 60 KT 70 MPH
96H 22/1800Z 17.5N 88.5W 50 KT 60 MPH…INLAND
120H 23/1800Z 19.0N 92.0W 30 KT 35 MPH…OVER WATER

 

BULLETIN
Tropical Storm Harvey Advisory Number 6
NWS National Hurricane Center Miami FL AL092017
500 PM AST Fri Aug 18 2017

…HARVEY MOVING THROUGH THE EASTERN CARIBBEAN SEA…

 

SUMMARY OF 500 PM AST…2100 UTC…INFORMATION
———————————————-
LOCATION…13.4N 62.9W
ABOUT 130 MI…210 KM WSW OF ST. LUCIA
ABOUT 405 MI…650 KM SSE OF SAN JUAN PUERTO RICO
MAXIMUM SUSTAINED WINDS…40 MPH…65 KM/H
PRESENT MOVEMENT…W OR 275 DEGREES AT 21 MPH…33 KM/H
MINIMUM CENTRAL PRESSURE…1005 MB…29.68 INCHES

 

WATCHES AND WARNINGS
——————–
There are no coastal watches or warnings in effect.

Interests in the Caribbean Sea and the adjacent land areas of
eastern Central American and northern South America should monitor
the progress of Harvey.

 

DISCUSSION AND 48-HOUR OUTLOOK
——————————
At 500 PM AST (2100 UTC), the center of Tropical Storm Harvey was
located near latitude 13.4 North, longitude 62.9 West. Harvey is
moving toward the west near 21 mph (33 km/h) and this general motion
is expected to continue for the next couple of days. On the
forecast track, the center of Harvey will move through the eastern
Caribbean Sea tonight and through the central Caribbean Sea
Saturday and Saturday night.

Maximum sustained winds are near 40 mph (65 km/h) with higher gusts.
Slow strengthening is forecast during the next 48 hours.

Tropical-storm-force winds extend outward up to 70 miles (110 km)
mainly to the north of the center.

The estimated minimum central pressure is 1005 mb (29.68 inches).

 

HAZARDS AFFECTING LAND
———————-
RAINFALL: Locally heavy rains could occur tonight over portions of
the Windward Islands and the offshore islands of northern Venezuela.
Locally heavy rains could also occur over Aruba, Bonaire, and
Curacao on Saturday.

NEXT ADVISORY
————-
Next complete advisory at 1100 PM AST.

$$
Forecaster Beven

 

TROPICAL STORM HARVEY FORECAST/ADVISORY NUMBER 6
NWS NATIONAL HURRICANE CENTER MIAMI FL AL092017
2100 UTC FRI AUG 18 2017

THERE ARE NO COASTAL WATCHES OR WARNINGS IN EFFECT.

INTERESTS IN THE CARIBBEAN SEA AND THE ADJACENT LAND AREAS OF
EASTERN CENTRAL AMERICAN AND NORTHERN SOUTH AMERICA SHOULD MONITOR
THE PROGRESS OF HARVEY.

TROPICAL STORM CENTER LOCATED NEAR 13.4N 62.9W AT 18/2100Z
POSITION ACCURATE WITHIN 40 NM

PRESENT MOVEMENT TOWARD THE WEST OR 275 DEGREES AT 18 KT

ESTIMATED MINIMUM CENTRAL PRESSURE 1005 MB
MAX SUSTAINED WINDS 35 KT WITH GUSTS TO 45 KT.
34 KT……. 60NE 0SE 0SW 60NW.
12 FT SEAS..150NE 0SE 0SW 60NW.
WINDS AND SEAS VARY GREATLY IN EACH QUADRANT. RADII IN NAUTICAL
MILES ARE THE LARGEST RADII EXPECTED ANYWHERE IN THAT QUADRANT.

REPEAT…CENTER LOCATED NEAR 13.4N 62.9W AT 18/2100Z
AT 18/1800Z CENTER WAS LOCATED NEAR 13.3N 62.1W

FORECAST VALID 19/0600Z 13.6N 65.7W
MAX WIND 35 KT…GUSTS 45 KT.
34 KT… 60NE 0SE 0SW 60NW.

FORECAST VALID 19/1800Z 13.9N 69.3W
MAX WIND 40 KT…GUSTS 50 KT.
34 KT… 60NE 0SE 0SW 60NW.

FORECAST VALID 20/0600Z 14.2N 73.0W
MAX WIND 40 KT…GUSTS 50 KT.
34 KT… 60NE 0SE 0SW 60NW.

FORECAST VALID 20/1800Z 14.5N 76.7W
MAX WIND 45 KT…GUSTS 55 KT.
34 KT… 60NE 30SE 30SW 60NW.

FORECAST VALID 21/1800Z 15.5N 83.5W
MAX WIND 60 KT…GUSTS 75 KT.
50 KT… 40NE 20SE 20SW 40NW.
34 KT… 80NE 40SE 40SW 80NW.

EXTENDED OUTLOOK. NOTE…ERRORS FOR TRACK HAVE AVERAGED NEAR 150 NM
ON DAY 4 AND 200 NM ON DAY 5…AND FOR INTENSITY NEAR 15 KT EACH DAY

OUTLOOK VALID 22/1800Z 17.5N 88.5W…INLAND
MAX WIND 50 KT…GUSTS 60 KT.

OUTLOOK VALID 23/1800Z 19.0N 92.0W…OVER WATER
MAX WIND 30 KT…GUSTS 40 KT.

REQUEST FOR 3 HOURLY SHIP REPORTS WITHIN 300 MILES OF 13.4N 62.9W

NEXT ADVISORY AT 19/0300Z

GULFIR172302115       This satellite picture depicts an irregular storm center on the IR Loop.  It could better organize and center seems kind of oblique looking.

http://www.goes.noaa.gov/HURRLOOPS/gulfir.html

GULFWV172301915

https://radar.weather.gov/ridge/radar.php?rid=amx&product=N0R&overlay=11101111&loop=no

southeast

activity_loop (3)

This chart shows a lot of instability and a few showers and thunderstorms.   Pretty good indicator of enhanced convective activity.  I am not so certain of the forecast path and even a strong circulation.    Right now it is diffuse.  The next few hours may give a few answers.

Meteorologist Larry Olson (Mike Scott) – DWWX–