000
AXNT20 KNHC 231010
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT TUE MAR 23 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1015 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 6N8W 4N23W 3N41W CROSSING THE 
EQUATOR AND INTO SOUTH AMERICA NEAR 50W. CLUSTERS OF SCATTERED 
MODERATE/ISOLATED STRONG CONVECTION ARE FROM 3N TO S OF THE 
EQUATOR E OF 17W TO ACROSS THE PRIME MERIDIAN AND FROM 6N TO S 
OF THE EQUATOR FROM 26W-50W. 

...DISCUSSION...

GULF OF MEXICO...
A SURFACE RIDGE COVERS THE GULF ANCHORED BY A 1020 MB HIGH IN 
THE S GULF NEAR 23N91W. BROKEN LOW CLOUDS WITH SOME POSSIBLE 
ISOLATED SHOWERS ARE OVER THE E GULF E OF 90W. THE UPPER TROUGH 
ASSOCIATED WITH THE FRONT THAT PASSED OUT OF THE GULF ON MON 
STILL COVERS THE E GULF E OF 87W AS AN UPPER RIDGE ANCHORED IN 
THE E PACIFIC MOVES ACROSS THE W GULF. STRONG SUBSIDENCE AND DRY 
AIR ALOFT DOMINATES THE AREA E OF 90W AND S OF 23N W OF 
90W...THUS FAIR WEATHER FOR MOST OF THE GULF THIS MORNING. HIGH 
PRESSURE WILL REMAIN IN CONTROL OF THE GULF WITH THE NEXT WEAKER 
FRONT MOVING INTO THE GULF LATE THU.  

CARIBBEAN SEA...
A COLD FRONT EXTENDS FROM THE W ATLC ACROSS E CUBA NEAR SANTIAGO 
TO 17N80W WHERE IT BECOMES STATIONARY TO THE NICARAGUA/COSTA 
RICA BORDER WITH BROKEN TO OVERCAST LOW/MID CLOUD AND SCATTERED 
SHOWERS WITHIN 180 NM W OF THE FRONT N OF 16N. BROKEN/OVERCAST 
LOW CLOUDS WITH PATCHES OF FOG/HAZE/DRIZZLE ARE INLAND AND 
WITHIN 90 NM ALONG THE COAST OF HONDURAS AND NICARAGUA. FRESH TO 
STRONG EASTERLY TRADE WINDS DOMINATE THE REMAINDER OF THE 
CARIBBEAN BANKING LOW/MID CLOUDS WITH SCATTERED SHOWERS AND 
POSSIBLE ISOLATED THUNDERSTORMS INLAND AND WITHIN 30 NM ALONG 
THE COAST OF W PANAMA AND COSTA RICA AS WELL AS USHERING IN SOME 
LOW LEVEL FAST MOVING SHOWERS ACROSS THE E CARIBBEAN. THE BROAD 
UPPER RIDGE AXIS REMAINS ACROSS THE CARIBBEAN EXTENDING FROM 
COSTA RICA THROUGH THE MONA PASSAGE INTO THE CENTRAL ATLC. 
STRONG SUBSIDENCE AND DRY AIR ALOFT DOMINATES THE ENTIRE AREA... 
THUS MOSTLY CLEAR CLEAR SKIES ACROSS THE REMAINDER OF THE 
CARIBBEAN THIS MORNING. 

ATLANTIC OCEAN...
A COLD FRONT ENTERS THE W ATLC NEAR 32N72W EXTENDING S ALONG 
25N73W ACROSS THE BAHAMAS AND INTO THE W CARIBBEAN OVER E CUBA 
NEAR SANTIAGO. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE 
WITHIN 90/120 NM E OF THE FRONT N OF 22N WITH ISOLATED SHOWERS 
WITHIN 180 NM W OF THE FRONT S OF 27N. THE UPPER LEVEL SUPPORT 
FOR THIS FRONT COVERS THE AREA N OF 23N W OF 67W WITH THE UPPER 
LOW MOVING INTO VIRGINIA. DRY STABLE AIR ALOFT IS W OF THE FRONT 
WITH BROKEN LOW LEVEL CLOUDS AND POSSIBLE ISOLATED SHOWERS 
WITHIN 60/75 NM OF LINE FROM ACROSS THE FLORIDA PENINSULA 
BETWEEN TAMPA AND DAYTONA BEACH TO BEYOND 32N76W. A BROAD 
SURFACE RIDGE COVERS THE REMAINDER OF THE ATLC ANCHORED BY A 
1032 MB HIGH IN THE N/CENTRAL ATLC WELL N OF THE REGION. A 
WEAKENING COLD FRONT ENTERS THE E ATLC NEAR 32N25W EXTENDING SW 
TO 26N33W DISSIPATING TO 22N47W WITH POSSIBLE ISOLATED SHOWERS 
WITHIN 90 NM E OF THE FRONT. THE UPPER SUPPORT OF THIS FRONT IS 
N OF 20N FROM 20W-45W. 

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

$$
WALLACE