000
AXNT20 KNHC 070019
TWDAT 

TROPICAL WEATHER DISCUSSION      
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
805 PM EDT SUN APR 06 2008

TROPICAL WEATHER DISCUSSION FOR NORTH AMERICA...CENTRAL 
AMERICA...THE GULF OF MEXICO...THE CARIBBEAN SEA...NORTHERN 
SECTIONS OF SOUTH AMERICA...AND THE 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY
THROUGH 2345 UTC.

...THE ITCZ...

FROM SIERRA LEONE NEAR 8N13W TO 4N20W 1N30W...CROSSING THE 
EQUATOR NEAR 39W...INTO NORTHEASTERN BRAZIL NEAR 3S46W. ISOLATED 
MODERATE SHOWERS TO LOCALLY STRONG THUNDERSTORMS ARE IN CLUSTERS
FROM THE EQUATOR TO 9N BETWEEN 24W AND 29W...AND FROM 2N TO 5N 
BETWEEN 42W AND 52W. ISOLATED MODERATE SHOWERS FROM 1N TO 6N 
BETWEEN 13W AND 18W...AND FROM 3N TO 9N BETWEEN 30W AND 37W.

...DISCUSSION...

THE GULF OF MEXICO...

MIDDLE TO UPPER LEVEL WESTERLY WIND FLOW MOVES ACROSS MEXICO 
FROM THE EASTERN PACIFIC OCEAN...INTO THE WESTERN GULF OF MEXICO 
WEST OF 90W. A HINT OF A SHORTWAVE TROUGH IS MOVING THROUGH 
NORTHEASTERN TEXAS. A MIDDLE TO UPPER LEVEL CYCLONIC CIRCULATION 
CENTER IS IN THE NORTHEASTERN GULF OF MEXICO. THIS CYCLONIC 
CENTER IS DRIVING THE FRONTAL BOUNDARY IN THE GULF OF MEXICO.
A 1012 MB LOW PRESSURE CENTER IS JUST OFF THE SOUTHEASTERN COAST 
OF LOUISIANA. A WARM FRONT EXTENDS FROM THE LOW CENTER TO THE 
WEST CENTRAL COAST OF FLORIDA. A STATIONARY FRONT EXTENDS FROM
THE LOW CENTER TO 27N90W AND TO A 1009 MB LOW PRESSURE CENTER 
NEAR 23N97W. MIDDLE TO UPPER LEVEL DRY AIR/SUBSIDENCE IS 
EVERYWHERE IN THE GULF OF MEXICO...EXCEPT FOR THE STRONG SHOWERS 
AND THUNDERSTORMS FROM 25N TO 29N BETWEEN 83W AND 90W. ISOLATED 
MODERATE TO STRONG SHOWERS AND THUNDERSTORMS ARE OVER LAND IN 
FLORIDA FROM MIAMI-DADE COUNTY/BROWARD COUNTY TO THE FLORIDA 
EAST COAST ABOUT 60 NM NORTH-NORTHEAST OF LAKE OKEECHOBEE.

THE CARIBBEAN SEA...

ISOLATED MODERATE SHOWERS/THUNDERSTORMS ARE OCCURRING OVER AND 
AROUND CUBA FROM THE WINDWARD PASSAGE WESTWARD IN AN AREA OF
A WEAK MIDDLE TO UPPER LEVEL TROUGH FROM THE NORTHEASTERN GULF 
OF MEXICO CYCLONIC CIRCULATION CENTER. A MIDDLE TO UPPER LEVEL 
RIDGE EXTENDS TO HONDURAS/NICARAGUA FROM AN ANTICYCLONIC 
CIRCULATION CENTER IN WESTERN GUATEMALA AND SOUTHEASTERN MEXICO.
MIDDLE TO UPPER LEVEL ANTICYCLONIC WIND FLOW STILL COVERS THE 
CARIBBEAN SEA EAST OF 80W. BROAD MIDDLE LEVEL CYCLONIC WIND FLOW 
IS AIDING THE DEVELOPMENT OF SHOWERS AND THUNDERSTORMS FROM 
PANAMA ALONG 81W TO NORTHERN COSTA RICA/SOUTHERN NICARAGUA.
 
THE ATLANTIC OCEAN...

DEEP LAYER CYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN NORTH OF 
23N EAST OF 44W ON WATER VAPOR IMAGERY. A COLD FRONT PASSES 
THROUGH THE ATLANTIC OCEAN JUST WEST OF THE MADEIRA ARCHIPELAGO 
TO THE WATERS JUST WEST OF THE CANARY ISLANDS NEAR 27N20W TO 
22N27W AND 20N34W. BROKEN TO OVERCAST LOW TO MIDDLE LEVEL CLOUDS 
ARE WITHIN 120 NM ON EITHER SIDE OF THE LINE THROUGH 30N15W
23N25W 18N40W. A 1025 MB HIGH PRESSURE CENTER IS NEAR 28N62W. 
SURFACE ANTICYCLONIC WIND FLOW COVERS THE ATLANTIC OCEAN NORTH 
OF 10N BETWEEN 36W AND 80W. AN UPPER LEVEL RIDGE IS ALONG 24N65W 
BEYOND 33N63W.

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MT