000
AXNT20 KNHC 031736
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
205 PM EDT SAT APR 03 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 1715 UTC...

...THE ITCZ...

FROM THE LIBERIA COAST NEAR 6N10W TO 4N20W 2N30W 1N40W...CROSSING
THE EQUATOR ALONG 42W...INTO NORTHEASTERN BRAZIL NEAR 3S47W.
SCATTERED STRONG SHOWERS AND THUNDERSTORMS FROM 6N TO 7N BETWEEN 
12W AND 14W...FROM THE EQUATOR TO 1N BETWEEN 36W AND 37W...AND
FROM 2N TO 5N BETWEEN 30W AND 38W. ISOLATED MODERATE SHOWERS ARE
ELSEWHERE TO THE SOUTH OF 7N.

...DISCUSSION...

THE GULF OF MEXICO...
MIDDLE LEVEL TO UPPER LEVEL WESTERLY FLOW FROM THE EASTERN 
PACIFIC OCEAN ACROSS MEXICO LEADS TO CYCLONIC FLOW ACROSS THE 
WESTERN TWO-THIRDS OF THE GULF OF MEXICO. A MIDDLE LEVEL TO 
UPPER LEVEL TROUGH SWINGS INTO THE GULF OF MEXICO FROM THE GULF 
COAST BETWEEN MISSISSIPPI AND EAST TEXAS. THE TROUGH SUPPORTS
A STATIONARY FRONT THAT STILL IS OVER LAND...AND A COASTAL
SURFACE TROUGH THAT GOES FROM LOUISIANA NEAR 30N92W TO 28N96W
TO 27N100W IN NORTHERN MEXICO.

THE CARIBBEAN SEA...
DEEP LAYER CYCLONIC FLOW COVERS THE ATLANTIC OCEAN TO THE WEST 
OF A 32N37W 25N39W 14N40W UPPER LEVEL RIDGE. THE CYCLONIC FLOW
PUSHES RIGHT UP AGAINST THE CARIBBEAN SEA BASIN. THE TROUGH ON 
WATER VAPOR IMAGERY PASSES THROUGH 26N64W TO CENTRAL HISPANIOLA.
A COLD FRONT CONTINUES FROM THE ATLANTIC OCEAN THROUGH 24N50W
17N60W...INTO THE CARIBBEAN SEA NEAR 15N65W. A REMNANT CLOUD
LINE CONTINUES FROM 15N65W TO 15N72W TO 14N80W. ISOLATED
MODERATE SHOWERS ARE WITHIN 120 NM ON EITHER SIDE OF THE LINE
THAT PASSES THROUGH 22N50W 17N60W 16N65W 16N75W 14N80W.
UPPER LEVEL SOUTHWESTERLY WIND FLOW COVERS THE AREA TO THE
SOUTH OF THE LINE THAT PASSES THROUGH 11N85W 13N79W 14N70W
BEYOND 17N60W. UPPER LEVEL WESTERLY WIND FLOW COVERS THE
REST OF THE AREA.

THE ATLANTIC OCEAN...
AN UPPER LEVEL RIDGE PASSES THROUGH 32N37W TO 25N39W AND 14N40W.
DEEP LAYER CYCLONIC FLOW COVERS THE AREA TO THE WEST OF THE 
RIDGE. A TROUGH GOES FROM ONE CYCLONIC CIRCULATION CENTER THAT 
IS NEAR 33N53W TO A SECOND CYCLONIC CENTER THAT IS NEAR 31N58W.
THE TROUGH CONTINUES FROM 31N58W TO 26N64W TO CENTRAL HISPANIOLA.
THIS TROUGH SUPPORTS THE COLD FRONT THAT STARTS AT THE END OF AN 
OCCLUDED FRONT THAT IS NEAR 31N49W TO 24N50W 17N60W...INTO THE
CARIBBEAN SEA NEAR 15N65W. A REMNANT CLOUD LINE CONTINUES FROM 
15N65W TO 15N72W TO 14N80W. ISOLATED MODERATE SHOWERS ARE WITHIN 
120 NM ON EITHER SIDE OF THE LINE THAT PASSES THROUGH 32N39W
27N40W 22N50W 17N60W 16N65W 16N75W 14N80W. A MIDDLE LEVEL TO 
UPPER LEVEL TROUGH CURVES ON TOP OF MOROCCO AND WESTERN SAHARA 
TO 20N15W IN WESTERN MAURITANIA TO 16N15W. A SURFACE TROUGH 
CURVES FROM 30N33W TO 27N29W 26N29W 24N30W. A REMNANT CLOUD LINE 
CONTINUES FROM 24N30W TO 22N34W AND 20N39W. SHOWERS ARE POSSIBLE
TO THE NORTH OF 23N BETWEEN 25W AND 30W.

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

$$
MT