000
AXNT20 KNHC 271045
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT SAT MAR 27 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1015 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N9W 4N14W 3N27W ALONG THE EQUATOR 
FROM 47W TO INLAND OVER NE BRAZIL. SMALL CLUSTERS OF SCATTERED 
MODERATE/ISOLATED STRONG CONVECTION ARE WITHIN 90 NM EITHER SIDE 
OF THE ITCZ FROM 22W-29W. 

...DISCUSSION...

GULF OF MEXICO...
AS OF 27/0900 UTC...A COLD FRONT IS OVER THE W ATLC EXTENDING A 
STATIONARY FRONT THROUGH THE FLORIDA STRAITS NEAR 25N80W TO 
23N83W WHERE IT DISSIPATES TO OVER THE YUCATAN PENINSULA NEAR 
22N87W TO 18N89W. ISOLATED SHOWERS ARE POSSIBLE WITHIN 75/90 NM 
W OF THE FRONTAL BOUNDARY. THE UPPER SUPPORT FOR THIS FRONT 
CONTINUES TO MOVE INTO THE W ATLC COVERING THE GULF N OF 26N E 
OF 88W INTO THE W ATLC. NEAR ZONAL UPPER WESTERLY FLOW DOMINATES 
THE REMAINDER OF THE GULF WITH MODERATE/STRONG SUBSIDENCE AND 
DRY AIR ALOFT COVERING THE ENTIRE BASIN. A WEAK 1017 MB HIGH IS 
CENTERED OVER THE N GULF NEAR 28N87W. THUS...THE REMAINDER OF 
THE GULF IS UNDER CLEAR SKIES TONIGHT EXCEPT OVER THE SW GULF 
WHERE RESIDUAL LOW CLOUDS PERSIST. 

CARIBBEAN SEA...
THE COLD FRONT IN THE GULF OF MEXICO REMAINS N OF THE YUCATAN 
CHANNEL AND IS BEGINNING TO DISSIPATE. NEAR ZONAL UPPER WESTERLY 
FLOW WITH STRONG SUBSIDENCE AND DRY STABLE AIR ALOFT DOMINATES 
THE ENTIRE BASIN. FRESH TO STRONG TRADEWINDS CONTINUE ACROSS THE 
MAJORITY OF THE CARIBBEAN WITH STRONGEST WINDS ALONG THE COAST 
OF N COLOMBIA. THUS..FAIR WEATHER AND CLEAR SKIES DOMINATE THE 
ENTIRE CARIBBEAN ALTHOUGH SOME WIDELY ISOLATED LOW LEVEL SHOWERS 
ARE POSSIBLE BEING USHERED IN ON THE EASTERLY TRADE WINDS. 

ATLANTIC OCEAN...
AS OF 27/0900 UTC...A COLD FRONT ENTERS THE W ATLC NEAR 32N66W 
EXTENDING SW ALONG 28N72W TO OVER THE BAHAMA ISLANDS NEAR 26N77W 
WHERE IT BECOMES STATIONARY CONTINUING INTO THE FLORIDA STRAITS 
AND THE GULF OF MEXICO NEAR 25N80W. SCATTERED SHOWERS/ISOLATED 
THUNDERSTORMS ARE WITHIN 150 NM E OF THE FRONT N OF 26N WITH 
SCATTERED SHOWERS WITHIN 150/180 NM E OF THE REMAINDER OF THE 
FRONTAL BOUNDARY INTO THE GULF OF MEXICO. THE UPPER LEVEL 
SUPPORT FOR THIS FRONT IS N OF 26N W OF 66W INTO THE GULF OF 
MEXICO. A SURFACE TROUGH IS IN THE TROPICAL ATLC EXTENDING FROM 
23N48W THROUGH A 1014 MB LOW NEAR 19N47W TO 16N45W. BROKEN/ 
OVERCAST LOW/MID CLOUDS WITH ISOLATED SHOWERS DEFINE THIS 
FEATURE COVERING THE AREA FROM 17N-22N BETWEEN 41W-49W. A SECOND 
SURFACE TROUGH IS IN THE E TROPICAL ATLC EXTENDING FROM 25N33W 
TO 19N36W. BROKEN/OVERCAST LOW/MID CLOUDS DEFINE THIS FEATURE 
COVERING THE AREA FROM 18N-26N BETWEEN 30W-37W. A WEAKENING COLD 
FRONT ENTERS THE NE/CENTRAL ATLC THROUGH 32N32W EXTENDING SW TO 
28N37W DISSIPATING TO 26N42W. ANY SHOWER ACTIVITY IS N OF THE 
REGION. THE UPPER SUPPORT FOR THIS FRONT IS N OF 21N FROM 
27W-42W. A SURFACE RIDGE COVERS THE ATLC N OF 22N W OF 60W WITH 
WEAKNESSES IN THE IMMEDIATE VICINITY OF THE COLD FRONT IN THE 
CENTRAL ATLC AND SURFACE TROUGHS IN THE TROPICAL ATLC. A 1022 MB 
HIGH IS IN THE CENTRAL ATLC NEAR 32N49W AND A 1028 MB HIGH IS IN 
THE NE ATLC 400 NM OFF THE COAST OF PORTUGAL. 
 
FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
WALLACE