000
AXNT20 KNHC 131147
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
705 AM EST SAT MAR 13 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 
1115 UTC.

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 7N10W 3N32W 2N45W ACROSS THE EQUATOR 
AND INLAND OVER SOUTH AMERICA NEAR 50W. SCATTERED MODERATE/ 
ISOLATED STRONG CONVECTION IS FROM 3N-7N BETWEEN 10W-15W 
INCLUDING THE COAST OF LIBERIA WITH CLUSTERS OF SIMILAR 
CONVECTION 150 NM OF LINE FROM THE ITCZ NEAR 3N33W TO 7N43W.  

...DISCUSSION...

GULF OF MEXICO...
LOW PRESSURE REMAINS IN CONTROL OF THE ENTIRE GULF WITH A COLD 
FRONT OVER THE FLORIDA PANHANDLE FROM JUST OFF THE COAST OF 
JACKSONVILLE JUST W OF LAKE OKEECHOBEE ACROSS THE MIDDLE 
FLORIDA KEYS TO OVER CUBA NEAR 23N82W INTO THE NW CARIBBEAN. 
FRONT IS SUPPORTED BY A LARGE UPPER TROUGH/LOW CENTERED OVER THE 
CENTRAL MISSISSIPPI VALLEY COVERING THE GULF N OF 22N. ALL OF 
THE SEVERE WEATHER ASSOCIATED WITH THE FRONT IS IN THE W ATLC 
WITH ISOLATED SHOWERS OVER THE SE GULF AND INTO THE FLORIDA 
STRAITS WITHIN 45 NM OF LINE FROM 23N86W TO 25N80W. A JETSTREAM 
WITH WINDS OF 90 TO 150 KT COVERS THE GULF N OF 21N. SKIES ARE 
REMARKABLY CLEAR BEHIND THE COLD FRONT WITH THE EXCEPTION OF 
OVERCAST LOW CLOUDS AND PATCHES OF FOG OVER THE E BAY OF 
CAMPECHE S OF 19N E OF 93W.  

CARIBBEAN SEA...
THE COLD FRONT ENTERS THE CARIBBEAN THROUGH THE FLORIDA STRAITS 
OVER CUBA NEAR 22N81W EXTENDING S TO OVER CENTRAL HONDURAS TO 
14N87W. SCATTERED SHOWERS ARE OVER THE GULF OF HONDURAS S OF 18N 
W OF THE FRONT TO INLAND OVER CENTRAL AMERICA. ISOLATED SHOWERS 
ARE WITHIN 200 NM E OF THE FRONT N OF 17N. DRY STABLE AIR ARE 
GIVING THE REMAINDER OF THE CARIBBEAN FAIR WEATHER AGAIN THIS 
MORNING. 

ATLANTIC OCEAN...
LOW PRESSURE DOMINATES THE FAR W ATLC WITH A COLD FRONT 
EXTENDING ALONG THE COAST OF GEORGIA TO INLAND OVER THE FLORIDA 
PENINSULA S OF JACKSONVILLE WITH CLUSTERS OF SCATTERED SHOWERS/ 
THUNDERSTORMS ARE FROM 24N-30N BETWEEN 68W-79W INCLUDING THE N 
BAHAMA ISLANDS. SURFACE RIDGE IS OVER THE REMAINDER OF THE W 
ATLC INTO THE CENTRAL ATLC ANCHORED BY A 1025 MB HIGH 600 NM E 
OF BERMUDA NEAR 34N53W. A DEEP LAYER TROUGH COVERS THE REMAINDER 
OF THE CENTRAL ATLC N OF 18N FROM 35W-60W SUPPORTING A 
STATIONARY FRONT THAT ENTERS THE E ATLC NEAR 32N28W ALONG 21N40W 
TO E OF THE LEEWARD ISLANDS NEAR 15N60W. SCATTERED SHOWERS AND 
POSSIBLE ISOLATED THUNDERSTORMS ARE WITHIN 120 NM EITHER SIDE OF 
THE FRONT N OF 25N. A WEAK SURFACE RIDGE IS OVER THE REMAINDER 
OF THE E ATLC EXTENDING OVER CANARY ISLANDS TO W OF THE CAPE 
VERDE ISLANDS NEAR 15N29W.  

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

$$
WALLACE