000
AXNT20 KNHC 220543
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
205 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0345 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 8N10W 3N21W 2N35W CROSSING THE 
EQUATOR NEAR 40W AND INTO NE BRAZIL NEAR 3S44W. CLUSTERS OF 
SCATTERED MODERATE TO ISOLATED STRONG CONVECTION ARE FROM 5N TO 
S OF THE EQUATOR BETWEEN 19W-45W. 

...DISCUSSION...

GULF OF MEXICO...
AS OF 22/0300 UTC...THE COLD FRONT EXTENDS OFF THE E COAST OF 
FLORIDA THEN SW ACROSS THE S FLORIDA PENINSULA NEAR PALM BEACH 
ACROSS THE MIDDLE FLORIDA KEYS TO OVER CUBA NEAR HAVANA AND INTO 
THE NW CARIBBEAN. THE HEAVY RAIN AND THUNDERSTORMS ARE NOW IN 
THE W ATLC AND IN THE FLORIDA STRAITS E OF THE FLORIDA KEYS WITH 
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS REMAINING OVER THE SE 
GULF SE OF A LINE FROM TAMPA FLORIDA TO THE YUCATAN PENINSULA 
NEAR 21N89W. A BROAD UPPER TROUGH IS SUPPORTING THIS FRONT WITH 
THE UPPER LOW MOVING E ACROSS CENTRAL MISSISSIPPI WITH ISOLATED 
SHOWERS N OF 27N TO INLAND OVER THE N GULF COAST BETWEEN 
APALACHICOLA BAY FLORIDA TO THE LOUISIANA/TEXAS BORDER. STRONG 
SUBSIDENCE ALOFT DOMINATES THE AREA EXCEPT FOR THE FAR E GULF 
BRINGING CLEARING SKIES FOR THE REMAINDER OF THE GULF. 

CARIBBEAN SEA...
AS OF 22/0300 UTC...THE COLD FRONT EXTENDS ACROSS CUBA NEAR 
HAVANA INTO THE CARIBBEAN TO THE COAST OF HONDURAS NEAR 15N87W. 
SCATTERED SHOWERS/ISOLATED THUNDERSTORMS ARE 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 
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 ISOLATED SHOWERS OVER THE 
SW CARIBBEAN S OF 15N TO OVER COSTA RICA AND PANAMA BETWEEN 
77W-83W. STRONG SUBSIDENCE AND DRY STABLE AIR ALOFT COVERS THE E 
CARIBBEAN AND THUS CLEAR SKIES TONIGHT E OF 75W. 

ATLANTIC OCEAN...
AS OF 22/0300 UTC...THE COLD FRONT EXTENDS OFF THE GEORGIA COAST 
BETWEEN SAVANNAH AND BRUNSWICK THEN INLAND OVER THE FLORIDA 
PENINSULA NEAR PALM BEACH CONTINUING THROUGH THE FLORIDA STRAITS 
AND INTO THE NW CARIBBEAN. MOSAIC RADAR INDICATES BANDS OF HEAVY 
SHOWERS WITH THUNDERSTORMS WITHIN 60/75 NM OF LINE FROM 23N80W 
TO 31N77W. THE UPPER TROUGH SUPPORTING THIS FRONT IS MOVING OFF 
THE US EAST COAST INTO THE W ATLC W OF 78W. A SURFACE RIDGE 
COVERS THE REMAINDER OF THE W ATLC INTO THE CENTRAL ATLC 
ANCHORED BY A 1028 MB HIGH ABOUT 400 NM NE OF BERMUDA. AN UPPER 
LEVEL RIDGE EXTENDS OVER THE SAME AREA WITH THE AXIS EXTENDING 
FROM THE CARIBBEAN ACROSS THE LEEWARD ISLANDS TO 28N27W. AN 
UPPER LEVEL TROUGH IS OVER THE N/CENTRAL ATLC N OF 29N FROM 
30W-45W SUPPORTING A COLD FRONT THAT ENTERS THE REGION NEAR 
32N37W EXTENDING SW TO 24N50W WITH ANY SHOWER ACTIVITY N OF THE 
REGION. A SURFACE RIDGE IS OVER THE E ATLC ANCHORED BY A 1026 MB 
HIGH ABOUT 400 NM N OF THE CANARY ISLANDS. 

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

$$
WALLACE