000
AXNT20 KNHC 110538
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
105 AM EST THU MAR 11 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 5N8W 4N21W 1N32W ACROSS THE EQUATOR 
NEAR 38W TO INLAND OVER SOUTH AMERICA NEAR 2S46W. SCATTERED 
MODERATE/ISOLATED STRONG CONVECTION IS WITHIN 120 NM S OF ITCZ 
BETWEEN 16W-19W. 

...DISCUSSION...

GULF OF MEXICO...
LOW PRESSURE MAINTAINS CONTROL OVER THE ENTIRE GULF WATERS WITH 
A FRONTAL SYSTEM REMAINING INLAND OVER SOUTHERN PLAIN STATES. A 
SHORTWAVE UPPER TROUGH CENTERED FROM AN UPPER LOW OVER E KANSAS 
EXTENDS S OVER TEXAS MOVING TOWARD LOWER MISSISSIPPI VALLEY. AN 
UPPER RIDGE COVERS THE GULF ANCHORED IN THE E PACIFIC AND 
CONTINUES TO DRAW TROPICAL MOISTURE ACROSS MEXICO AND THE GULF 
WATERS. SOUTHERLY SURFACE WINDS ACCOMPANIED BY LOW-LEVEL 
MOISTURE AND INSTABILITY ARE COMBINING TO GENERATE SCATTERED 
SHOWERS/ISOLATED THUNDERSTORMS INLAND OVER S MISSISSIPPI AND 
ALABAMA WELL AS IN THE NE GULF WATERS N OF 27N E OF 90W ACROSS 
THE FLORIDA PENINSULA. A SQUALL LINE ASSOCIATED WITH THE NEXT 
FRONT TO ENTER THE GULF IS OVER NW LOUISIANA AND THROUGH 
ARKANSAS. 

CARIBBEAN SEA...
THE REMNANTS OF A STATIONARY FRONT CROSSES CENTRAL ATLC TO OVER 
THE LEEWARD ISLANDS JUST N OF GUADELOUPE WITH A SHEAR AXIS 
CONTINUING W TO 16N71W. ISOLATED SHOWERS ARE N OF THE SHEAR 
AXIS TO OVER THE GREATER ANTILLES. SCATTERED/BROKEN LOW CLOUDS 
WITH POSSIBLE ISOLATED SHOWERS DOT THE AREA WITHIN 120 NM OF 
LINE FROM COLOMBIA NEAR 11N74W TO OVER W CUBA NEAR 23N83W. THE 
REMAINDER OF THE CARIBBEAN IS EXPERIENCING FAIR WEATHER TONIGHT. 

ATLANTIC OCEAN...
SURFACE RIDGE OVER THE W ATLC IS ANCHORED BY A 1022 MB HIGH JUST 
W OF BERMUDA NEAR 32N66W. ISOLATED SHOWERS USHERED IN ON THE 
WEAK UPPER FLOW EXTEND BETWEEN THE BAHAMA ISLANDS AND CUBA W OF 
75W. A DEEP LAYER TROUGH REMAINS OVER THE REMAINDER OF THE W AND 
OVER CENTRAL ATLC N OF 20N FROM 35W-70W SUPPORTING A COMPLEX 
FRONTAL BOUNDARY THAT EXTENDS FROM A 1007 MB LOW N OF THE 
MADEIRA ISLANDS THROUGH 32N15N ALONG 27N28W 29N37W TO A 1010 MB 
LOW NEAR 28N42W ALONG 21N48W TO THE LEEWARD ISLANDS JUST N OF 
GUADELOUPE. SCATTERED SHOWERS AND POSSIBLE ISOLATED 
THUNDERSTORMS ARE WITHIN 250 NM NW OF THE FRONT BETWEEN 
36W-58W. AN ILL-DEFINED UPPER LEVEL RIDGE EXETNDS FROM TROPICS 
NEAR 6N41W TO NEAR THE CANARY ISLANDS KEEPING CONDITIONS FAIR 
ACROSS THE REMAINDER OF THE E ATLC. 

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

$$
WALLACE