[Tropical] Tropical Weather Discussion

[EMWIN Server]

AXNT20 KNHC 090004
TWDAT

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT WED SEP 08 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 FEATURES...

TROPICAL STORM IGOR AT 09/0000 UTC IS NEAR 13.9N 24.2W...OR
ABOUT 70 MI...115 KM SSE OF SAO FILIPE IN THE CAPE VERDE ISLANDS
... MOVING MOVING W AT 5 KT. THE ESTIMATED MINIMUM CENTRAL
PRESSURE IS 1005 MB. MAXIMUM SUSTAINED WIND SPEED IS 40 KT WITH
GUSTS TO 50 KT. PLEASE SEE LATEST NHC INTERMEDIATE PUBLIC
ADVISORY UNDER AWIPS/WMO HEADERS MIATCPAT1/WTNT31 KNHC AND THE
FULL FORECAST AND ADVISORY UNDER AWIPS/WMO HEADERS
MIATCMAT1/WTNT21 KNHC FOR MORE DETAILS. THIS SYSTEM IS EMBEDDED
WITHIN AN AREA OF DEEP LEVEL MOISTURE AS INDICATED ON TOTAL
PRECIPITABLE WATER IMAGERY. BROAD AND ELONGATED SURFACE CYCLONIC
FLOW SURROUNDS IGOR AND TWO MORE SURFACE LOW PRESSURE SYSTEMS.
IGOR IS GENERATING SCATTERED MODERATE TO STRONG CONVECTION FROM
12N-16N BETWEEN 24W-29W.

...TROPICAL WAVES...

NONE.

...ITCZ...

AN ITCZ AXIS EXTENDS FROM SW OF IGOR AT 10N25W TO 9N30W 11N50W
13N60W. BESIDES THE CONVECTION MENTIONED IN THE SPECIAL FEATURES
SECTION...WIDELY SCATTERED MODERATE CONVECTION IS FROM 6N-8N
BETWEEN 33W-39W...AND FROM 6N-14N BETWEEN 55W-62W.

...DISCUSSION...

GULF OF MEXICO...
RESIDUAL SCATTERED MODERATE CONVECTION IS INLAND OVER SE TEXAS
FROM 27N-31N BETWEEN 95W-98W. SURFACE RIDGING IS OVER THE GULF
OF MEXICO WITH MOSTLY FAIR WEATHER OVER THE W GULF W OF 90W.
CLUSTERS OF SCATTERED MODERATE CONVECTION IS INLAND OVER THE
YUCATAN PENINSULA AND S MEXICO S OF 22N. A SURFACE TROUGH IS
OVER FLORIDA AND THE SE GULF ALONG 30N80W 25N84W 22N85W. WIDELY
SCATTERED MODERATE CONVECTION IS WITHIN 60 NM EITHER SIDE OF THE
TROUGH. IN THE UPPER LEVELS... AN UPPER LEVEL HIGH IS CENTERED
OVER S LOUISIANA NEAR 30N91W. A WEDGE OF STRONG SUBSIDENCE IS
OVER THE CENTRAL AND WESTERN GULF W OF 88W. EXPECT...CONTINUED
CONVECTION OVER THE E GULF E OF 90W...AND OVER INLAND LOUISIANA
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 HISPANIOLA. SCATTERED MODERATE TO
ISOLATED STRONG CONVECTION IS FROM 16N-20N BETWEEN 70W-75W
MOVING W. WIDELY SCATTERED MODERATE CONVECTION IS OVER CUBA
BETWEEN 75W-85W. WIDELY SCATTERED MODERATE CONVECTION IS ALONG
THE COAST OF N COLOMBIA FROM 10N-14N BETWEEN 75W-81W. CLUSTERS
OF SCATTERED MODERATE CONVECTION ARE INLAND OVER CENTRAL AMERICA
FROM PANAMA TO S MEXICO. A SURFACE TROUGH IS OVER THE WINDWARD
ISLANDS AND NE VENEZUELA ALONG 14N60W 8N61W. WIDELY SCATTERED
MODERATE CONVECTION IS FROM 6N-14N BETWEEN 55W-62W. IN THE UPPER
LEVELS...AN UPPER LEVEL LOW IS CENTERED S OF CUBA NEAR 20N82W
MOVING W. THE REMAINDER OF THE CARIBBEAN HAS EASTERLY UPPER
LEVEL FLOW. EXPECT...CONVECTION FROM THE REMNANTS OF GASTON TO
MOVE W OVER THE NEXT 24 HOURS.

ATLANTIC OCEAN...
A 1019 MB HIGH IS OVER THE W ATLANTIC NEAR 31N69W PRODUCING FAIR
WEATHER. ANOTHER 1023 MB HIGH IS CENTERED OVER THE E ATLANTIC
NEAR 37N22W. ELSEWHERE...A 1010 MB LOW IS W OF THE CAPE VERDE
ISLANDS NEAR 19N36W. ANOTHER 1009 MB LOW IS OVER THE THE CAPE
VERDE ISLANDS NEAR 16N21W. SCATTERED SHOWERS ARE WITHIN
60 NM OF THE CENTER. OF NOTE IN THE UPPER LEVELS...AN UPPER
LEVEL HIGH IS CENTERED NE OF THE LEEWARD ISLANDS NEAR 19N57W
WITH STRONG SUBSIDENCE. AN UPPER LEVEL LOW IS CENTERED OVER THE
CENTRAL ATLANTIC NEAR 29N48W. ANOTHER UPPER LEVEL HIGH IS
CENTERED OVER W AFRICA NEAR 22N18W.

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

$$

FORMOSA




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