000
AXNT20 KNHC 082348
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 PM EDT THU APR 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...

...THE ITCZ...
THE ITCZ AXIS IS CENTERED ALONG 8N9W 4N19W 2N32W TO INLAND OVER 
BRAZIL SOUTH AMERICA NEAR 1N50W. CLUSTERS OF SCATTERED MODERATE/ 
ISOLATED STRONG CONVECTION ARE WITHIN 120/150 NM N OF THE ITCZ 
BETWEEN 21W-39W. 

...DISCUSSION...

GULF OF MEXICO...
AS OF 08/2100 UTC...A COLD FRONT ENTERS THE GULF OVER THE 
FLORIDA PANHANDLE NEAR PANAMA CITY EXTENDING ALONG 25N90W 21N94W 
THEN S TO OVER MEXICO JUST E OF VERACRUZ THEN NW AS A STATIONARY 
FRONT ALONG THE E SLOPES OF THE SIERRA MADRE MOUNTAINS. A 
SURFACE TROUGH IS SE OF THE FRONT EXTENDING FROM 27N87W TO THE 
YUCATAN PENINSULA NEAR 20N89W. SCATTERED/HEAVY SHOWERS WITH 
SCATTERED/NUMEROUS THUNDERSTORMS ARE WITHIN 90 NM E OF THE FRONT 
MAINLY N OF 25N AND ISOLATED SHOWERS ARE OVER THE SW GULF S OF 
23N W OF THE FRONT TO INLAND OVER MEXICO. THE DEEP LAYERED 
TROUGH SUPPORTING THIS FRONT IS OVER THE E US AND N GULF OF 
MEXICO N OF 28N AND CONTINUES TO MOVE EASTWARD. MODERATE TO 
STRONG SUBSIDENCE AND DRY STABLE AIR ALOFT ARE W OF THE FRONT 
BRINGING CLEAR SKIES TO THE NW GULF INCLUDING LOUISIANA AND 
TEXAS. CURRENTLY MOSTLY CLEAR SKIES ARE OVER THE SE GULF BUT 
ISOLATED SHOWERS ARE POSSIBLE LATE TONIGHT AND INTO FRI. THE 
FRONT IS EXPECTED TO MOVE E OF THE GULF FRI NIGHT. 

CARIBBEAN SEA...
THE SURFACE RIDGE OVER THE W AND CENTRAL ATLC IS GIVING THE 
CARIBBEAN MODERATE TO STRONG EASTERLY TRADE WINDS. NEAR ZONAL 
WESTERLY FLOW ALOFT COVERS THE ENTIRE CARIBBEAN WITH MODERATE TO 
STRONG SUBSIDENCE AND DRY STABLE AIR ALOFT. AN ABUNDANCE OF LOW 
LEVEL MOISTURE REMAINS OVER THE CARIBBEAN GENERATING BROKEN/ 
OVERCAST MULTILAYERED CLOUDS WITH SCATTERED SHOWERS S OF 27N E 
OF 68W ACROSS LESSER ANTILLES AND INTO THE W TROPICAL ATLC. THE 
REMAINDER OF THE CARIBBEAN IS ENJOYING FAIR WEATHER THIS 
EVENING. THE FRONT IN THE GULF OF MEXICO IS EXPECTED TO MOVE 
INTO THE CARIBBEAN FRI NIGHT AND DISSIPATING ON SAT. 

ATLANTIC OCEAN...
A SURFACE RIDGE COVERS THE W AND CENTRAL ATLC BETWEEN 35W-80W 
ANCHORED BY A 1024 MB HIGH NEAR 30N59W PRODUCING STRONG 
SUBSIDENCE ALOFT AND GIVING THE AREA FAIR WEATHER AGAIN THIS 
EVENING. A DEEP LAYERED TROUGH IS OVER THE E ATLC N OF 25N FROM 
25W-35W SUPPORTING STATIONARY FRONT THAT ENTERS THE REGION NEAR 
32N29W EXTENDING ALONG 24N32W 16N46W TO JUST S OF BARBADOS. 
SCATTERED SHOWERS ARE OVER THE W TROPICAL ATLC WITHIN 120 NM OF 
A LINE FROM 16N51W TO THE WINDWARD ISLANDS NEAR 13N61W. AN UPPER 
RIDGE AXIS EXTENDS FROM THE TROPICS NEAR 8N35W ALONG 20N20W TO 
INLAND OVER NW AFRICA BEYOND 32N7W PROVIDING DIFFLUENCE ALOFT TO 
GENERATE BROKEN/OVERCAST HIGH CLOUDS AND ISOLATED SHOWERS N OF 
25N E OF 22W TO INLAND OVER NW AFRICA INCLUDING THE CANARY 
ISLANDS. 

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

$$
WALLACE