[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 072352
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT TUE SEP 07 2010

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...METEOROLOGICAL ANALYSIS...WEATHER OBSERVATIONS...AND
RADAR.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH
2315 UTC.

...SPECIAL FEATURE...

TROPICAL DEPRESSION HERMINE IS CENTERED INLAND OVER TEXAS NEAR
31.1N 99.4W AT 08/0000 UTC...OR ABOUT 5 MI...10 KM SW OF BRADY
TEXAS...MOVING NNW AT 17 KT. THE ESTIMATED MINIMUM CENTRAL
PRESSURE IS 1003 MB. MAXIMUM SUSTAINED WIND SPEED IS 30 KT WITH
GUST TO 40 KT. PLEASE SEE LATEST NHC INTERMEDIATE PUBLIC
ADVISORY UNDER AWIPS/WMO HEADERS MIATCPAT5/WTNT35 KNHC AND THE
FULL FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT5/WTNT25
KNHC FOR MORE DETAILS. BANDS OF SCATTERED MODERATE CONVECTION
ARE INLAND OVER CENTRAL AND SE TEXAS AS WELL AS OVER THE NW GULF
OF MEXICO FROM 26N-33N BETWEEN 92W-100W.

...TROPICAL WAVES...

A TROPICAL WAVE IS OVER THE EASTERN TROPICAL ATLANTIC ALONG
20W/21W S OF 19N MOVING WEST 10-15 KT. A 1009 MB LOW IS EMBEDDED
ON THE WAVE AXIS AT 14N21W. THIS WAVE IS IN AN AREA OF DEEP
LEVEL MOISTURE AS INDICATED ON TOTAL PRECIPITABLE WATER IMAGERY.
WIDELY SCATTERED MODERATE CONVECTION IS FROM 12N-15N BETWEEN
18W-23W.

...ITCZ...

A MONSOON TROUGH IS S OF 20N E OF 25W TO W AFRICA. AN ITCZ AXIS
CONTINUES WESTWARD FROM 9N25W TO 8N30W TO 10N45W TO 11N60W.
BESIDES THE CONVECTION MENTIONED IN THE TROPICAL WAVE
SECTION...WIDELY SCATTERED MODERATE CONVECTION IS FROM 4N-9N
BETWEEN 25W-34W. SCATTERED MODERATE CONVECTION IS FROM 6N-8N
BETWEEN 40W-42W.

...DISCUSSION...

GULF OF MEXICO...
T.D. HERMINE IS CENTERED OVER CENTRAL TEXAS. SEE ABOVE. ISOLATED
MODERATE CONVECTION IS ALSO S OF THE DEPRESSION ALONG THE COAST
OF NE MEXICO FROM 22N-26N BETWEEN 96W-98W. ELSEWHERE...WIDELY
SCATTERED MODERATE CONVECTION IS OVER SOUTH FLORIDA...THE
STRAITS OF FLORIDA...AND W CUBA S OF 27N. MOSTLY FAIR WEATHER IS
OVER THE CENTRAL GULF. IN THE UPPER LEVELS... AN UPPER LEVEL
HIGH IS CENTERED OVER THE NW GULF NEAR 27N94W ENHANCING
CONVECTION. A WEDGE OF STRONG SUBSIDENCE IS OVER THE CENTRAL
GULF. EXPECT...CONVECTION TO PERSIST OVER THE E GULF E OF 90W...
AND OVER INLAND TEXAS FOR THE NEXT 24 HOURS.

CARIBBEAN SEA...
A RATHER LAX SURFACE PRESSURE GRADIENT IS OVER THE CARIBBEAN SEA
THUS TRADEWINDS ARE MOSTLY 10-15 KT. CONVECTION FROM THE
REMNANTS OF GASTON HAS REACHED PUERTO RICO. SCATTERED MODERATE
TO STRONG CONVECTION IS FROM 16N-19N BETWEEN 65W-69W MOVING W.
WIDELY SCATTERED MODERATE CONVECTION IS OVER THE COAST OF CUBA
BETWEEN 78W-85W. ISOLATED MODERATE CONVECTION IS ALONG THE COAST
OF N COLOMBIA FROM 10N-14N BETWEEN 73W-78W. SCATTERED MODERATE
CONVECTION IS INLAND OVER CENTRAL AMERICA FROM PANAMA TO S
MEXICO. IN THE UPPER LEVELS...THE E CARIBBEAN HAS SOUTHERLY FLOW
E OF 72W, AN UPPER LEVEL LOW IS CENTERED JAMAICA NEAR 18N78W
MOVING W. THE W CARIBBEAN W OF 82W HAS NE UPPER LEVEL FLOW.
EXPECT...CONVECTION FROM THE REMNANTS OF GASTON TO TRAVERSE
HISPANIOLA OVER THE NEXT 24 HOURS.

ATLANTIC OCEAN...
A WEAK SURFACE TROUGH IS OVER THE W ATLANTIC AND NORTHERN
BAHAMAS FROM 31N76W TO 26N79W. ISOLATED MODERATE CONVECTION IS
FROM 22N-28N BETWEEN 77W-80W. A 1022 MB HIGH IS OVER THE W
ATLANTIC NEAR 30N63W PRODUCING FAIR WEATHER. ANOTHER 1023 MB
HIGH IS CENTERED OVER THE CENTRAL ATLANTIC NEAR 39N34W.
ELSEWHERE...A TROUGH IS W OF THE CAPE VERDE ISLANDS ALONG 21N31W
16N31W. A 1009 MB LOW IS EMBEDDED ON THE WAVE AXIS NEAR 18N31W.
SCATTERED SHOWERS ARE WITHIN 60 NM OF THE TROUGH. OF NOTE IN THE
UPPER LEVELS...AN UPPER LEVEL HIGH IS CENTERED OVER THE W
ATLANTIC NEAR 25N62W WITH STRONG SUBSIDENCE. AN UPPER LEVEL LOW
IS CENTERED OVER THE CENTRAL ATLANTIC NEAR 29N51W. ANOTHER UPPER
LEVEL HIGH IS CENTERED OVER W AFRICA NEAR 21N16W.

FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$

FORMOSA





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