000
AXNT20 KNHC 221035
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 AM EDT MON MAR 22 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 7N10W 4N20W 3N31W THE ALONG THE 
EQUATOR FROM 40W TO INLAND OVER SOUTH AMERICA NEAR 50W. CLUSTERS 
OF SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 6N 
TO S OF THE EQUATOR BETWEEN 23W-45W. 

...DISCUSSION...

GULF OF MEXICO...
AS OF 22/0900 UTC...THE COLD FRONT EXTENDS OVER THE W ATLC 
THROUGH THE FLORIDA STRAITS NEAR 24N80W AND INTO THE W 
CARIBBEAN. SCATTERED TO HEAVY SHOWERS WITH POSSIBLE ISOLATED 
THUNDERSTORMS REMAIN OVER THE SE GULF SE OF A LINE FROM FLORIDA 
BETWEEN TAMPA AND FORT MYERS TO THE YUCATAN PENINSULA NEAR 
21N88W. THE BROAD UPPER TROUGH SUPPORTING THIS FRONT REMAINS 
OVER THE GULF WITH THE UPPER LOW MOVING E ACROSS CENTRAL ALABAMA 
AND ISOLATED SHOWERS N OF 27N TO INLAND OVER THE N GULF COAST 
BETWEEN CEDAR KEY FLORIDA AND VERMILION BAY LOUISIANA. A SURFACE 
RIDGE IS BUILDING BEHIND THE FRONT ANCHORED BY A 1022 MB HIGH 
OVER THE SW GULF NEAR 28N95W. OVERCAST LOW/MID CLOUDS WITH 
PATCHES OF FOG/HAZE/DRIZZLE COVERS THE E BAY OF CAMPECHE S OF 
22N E OF 95W TO OVER THE W YUCATAN PENINSULA. STRONG SUBSIDENCE 
ALOFT DOMINATES THE AREA EXCEPT FOR THE FAR E GULF BRINGING 
CLEAR SKIES FOR THE REMAINDER OF THE GULF THIS MORNING. 

CARIBBEAN SEA...
AS OF 22/0900 UTC...THE COLD FRONT EXTENDS ACROSS CUBA JUST W OF 
SANTA CLARA INTO THE CARIBBEAN TO THE COAST OF HONDURAS NEAR 
15N86W. SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE WITHIN 90 
NM EITHER SIDE OF THE FRONT N OF 20N WITH SCATTERED SHOWERS 
WITHIN 90 NM E OF THE FRONT AND W OF THE FRONT TO OVER THE 
YUCATAN PENINSULA AND THROUGH THE YUCATAN CHANNEL. THE UPPER 
TROUGH SUPPORTING THIS FRONT COVERS THE FAR NW CARIBBEAN AND 
ENHANCING THE UPPER RIDGE AXIS THAT EXTENDS FROM COSTA RICA/ 
PANAMA BORDER ENE ACROSS THE LEEWARD ISLANDS AND INTO THE 
CENTRAL ATLC. FRESH TO STRONG EASTERLY TRADEWINDS DOMINATE THE 
REMAINDER OF THE CARIBBEAN BANKING LOW/MID CLOUDS WITH SCATTERED 
SHOWERS/ISOLATED THUNDERSTORMS OVER THE SW CARIBBEAN S OF 11N TO 
OVER COSTA RICA AND PANAMA W OF 80W. STRONG SUBSIDENCE AND DRY 
STABLE AIR ALOFT COVERS THE E CARIBBEAN AND THUS CLEAR SKIES 
TONIGHT E OF 77W. 

ATLANTIC OCEAN...
AS OF 22/0900 UTC...THE COLD FRONT EXTENDS OFF THE SOUTH 
CAROLINA COAST INTO THE REGION THROUGH 32N79W THEN S ALONG 
28N78W TO OVER CUBA JUST W OF SANTA CLARA AND INTO THE W 
CARIBBEAN. SCATTERED TO HEAVY SHOWERS WITH SCATTERED 
THUNDERSTORMS ARE WITHIN 150/180 NM E OF THE FRONT. THE UPPER 
TROUGH SUPPORTING THIS FRONT CONTINUES TO MOVE OVER W ATLC TO 
75W. A SURFACE RIDGE COVERS THE REMAINDER OF THE W ATLC INTO THE 
CENTRAL ATLC ANCHORED BY A 1027 MB HIGH ABOUT 475 NM ENE OF 
BERMUDA. AN UPPER LEVEL RIDGE EXTENDS OVER THE SAME AREA WITH 
THE AXIS EXTENDING FROM THE CARIBBEAN ACROSS THE LEEWARD ISLANDS 
TO 26N28W. AN UPPER LEVEL TROUGH IS OVER THE E/CENTRAL ATLC N OF 
27N FROM 27W-45W SUPPORTING A WEAKENING COLD FRONT THAT ENTERS 
THE REGION NEAR 32N34W EXTENDING SW TO 24N48W AND ANY SHOWER 
ACTIVITY N OF THE REGION. A SURFACE RIDGE IS OVER THE E ATLC 
ANCHORED BY A 1025 MB HIGH ABOUT 500 NM N OF THE CANARY ISLANDS. 

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

$$
WALLACE