000
AXNT20 KNHC 111158
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL  
705 AM EST FRI MAR 11 2011

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...GULF OF MEXICO...CARIBBEAN SEA...NORTHERN SECTION 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.

...THE ITCZ...

FROM THE SOUTHERN LIBERIA COAST TO 4N17W...CROSSING THE 
EQUATOR ALONG 25W...INTO BRAZIL NEAR 3S41W. WIDELY SCATTERED
TO SCATTERED MODERATE RAINSHOWERS TO ISOLATED STRONG
THUNDERSTORMS ARE FROM 05S TO THE EQUATOR BETWEEN 9W AND
13W...AND FROM 5S TO 5N BETWEEN 10W AND 51W.

...DISCUSSION...

FROM THE ATLANTIC OCEAN THAT IS TO THE WEST OF 70W
INTO THE GULF OF MEXICO AND THE NORTHWESTERN CARIBBEAN SEA...
MIDDLE LEVEL TO UPPER LEVEL CYCLONIC FLOW COVERS THE U.S.A. TO 
THE EAST OF 100W...AND THE GULF OF MEXICO. A SEPARATE AREA OF 
UPPER LEVEL ANTICYCLONIC FLOW DEVELOPED IN THE SOUTHWESTERN 
CORNER OF THE AREA AND IT HAS MOVED ONTO THE YUCATAN PENINSULA.
THE CYCLONIC FLOW ACCOMPANIES A TROUGH THAT SUPPORTS A COLD 
FRONT THAT PASSES THROUGH 32N75W IN THE ATLANTIC OCEAN...ON TOP
OF GRAND BAHAMA ISLAND TO WESTERN CUBA...ACROSS NORTHERN BELIZE 
AND NORTHERN GUATEMALA INTO THE EASTERN ISTHMUS OF TEHUANTEPEC.
A SURFACE RIDGE PASSES THROUGH THE STATE OF LOUISIANA INTO THE 
SOUTHWESTERN CORNER OF THE GULF OF MEXICO. POSSIBLE RAINSHOWERS 
ARE WITHIN 30 NM ON EITHER SIDE OF 22N78W 26N76W 28N74W BEYOND
32N72W IN THE ATLANTIC OCEAN...AND FROM 15N TO 21N BETWEEN 84W 
AND 91W FROM GUATEMALA INTO MEXICO AND BELIZE.
 
THE REST OF THE CARIBBEAN SEA...
RAINSHOWERS ARE POSSIBLE TO THE EAST OF 70W...IN CLUSTERS OF 
BROKEN LOW TO MIDDLE LEVEL CLOUDS THAT ARE MOVING SOUTHWESTWARD 
FROM THE ATLANTIC OCEAN...FROM 13N AT THE NICARAGUA COAST TO 18N 
AT THE HAITI COAST BETWEEN 72W AND 83W...AND TO THE SOUTH OF 10N
ALONG THE PANAMA AND COSTA RICA COASTS BETWEEN 80W AND 83W.

THE REST OF THE ATLANTIC OCEAN TO THE EAST OF 70W...
A CYCLONIC CIRCULATION CENTER IS NEAR 26N49W IN WATER VAPOR 
IMAGERY. BROAD CYCLONIC FLOW COVERS THE ATLANTIC OCEAN TO THE 
NORTH OF 16N BETWEEN 40W AND 65W. A 1011 MB LOW PRESSURE CENTER 
IS NEAR 25N45W. ONE TROUGH EXTENDS FROM THE LOW CENTER TO 
30N58W. A SECOND TROUGH EXTENDS FROM 1011 MB LOW CENTER TO 
19N50W AND 18N61W. SCATTERED MODERATE RAINSHOWERS ARE FROM 24N 
TO 30N BETWEEN 40W AND 50W. BROAD CYCLONIC FLOW IN WATER VAPOR 
IMAGERY COVERS THE AREA THAT IS TO THE NORTH OF 24N TO THE EAST 
OF 30W. A 1002 MB LOW PRESSURE CENTER IS NEAR 33N18W. ISOLATED 
MODERATE RAINSHOWERS ARE TO THE NORTH OF 27N BETWEEN MOROCCO AND 
21W...INCLUDING ACROSS THE CANARY ISLANDS. BROKEN LOW LEVEL 
CLOUDS AND POSSIBLE PRECIPITATION ARE FROM 18N TO 25N BETWEEN 
24W AND 40W...AND WITHIN 90 NM ON EITHER SIDE OF 16N44W 9N55W.

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

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MT