000
AXNT20 KNHC 270556
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
205 AM EDT FRI MAR 27 2009

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 
0515 UTC.

...ITCZ...
ITCZ AXIS IS CENTERED ALONG 5N8W 4N10W CROSSING THE EQUATOR NEAR 
23W THEN ALONG 1S30W 1S40W TO THE NE COAST OF BRAZIL NEAR 3S44W. 
SCATTERED MODERATE TO STRONG CONVECTION IS FROM 1N-4N BETWEEN 
4W-20W. SCATTERED MODERATE CONVECTION IS FROM 2N-2S BETWEEN 
25W-35W. ISOLATED MODERATE CONVECTION IS FROM EQ-2S BETWEEN 
35W-40W. 
 
...DISCUSSION...

GULF OF MEXICO...
AS OF 0300 UTC...A SQUALL LINE IS OVER S LOUISIANA AND THE N 
GULF OF MEXICO ALONG 32N90W 28N94W MOVING NE. SCATTERED MODERATE 
TO STRONG CONVECTION IS FROM 28N-34N BETWEEN 87W-93W. A 1025 MB 
HIGH CENTERED OVER THE W ATLANTIC NEAR 30N70W IS PRODUCING 20-30 
KT SOUTHEASTERLY RETURN FLOW OVER THE GULF OF MEXICO. IN THE 
UPPER LEVELS...A RIDGE IS PRODUCING MOSTLY ZONAL FLOW OVER THE 
GULF WITH SIGNIFICANT UPPER LEVEL MOISTURE AND BROKEN HIGH 
CLOUDS N OF 20N. EXPECT THE SQUALL LINE TO MOVE OUT OF THE AREA 
OVER THE NEXT 24 HOURS. ALSO EXPECT A NEW COLD FRONT TO MOVE OFF 
THE TEXAS COAST TO THE NW GULF OF MEXICO IN 24 HOURS WITH GALE 
FORCE WINDS BEHIND THE FRONT.    

CARIBBEAN SEA...
WIDELY SCATTERED MODERATE CONVECTION IS INLAND OVER W VENEZUELA 
FROM 9N-11N BETWEEN 71W-73W. FRESH TRADEWINDS ARE OVER THE 
CARIBBEAN SEA WITH PATCHES OF BROKEN LOW CLOUDS AND SHOWERS 
ESPECIALLY OVER THE WINDWARD ISLANDS E OF 64W...HISPANIOLA... 
JAMAICA...COSTA RICA...AND PANAMA. WINDS ARE STRONGER HOWEVER 
NEAR BARBADOS WITH 30 KT AND SCATTERED SHOWERS. IN THE UPPER 
LEVELS...A RIDGE IS OVER THE W CARIBBEAN AND CENTRAL AMERICA W 
OF 80W. AN UPPER LEVEL TROUGH IS OVER THE CENTRAL CARIBBEAN 
BETWEEN 60W-70W. AN UPPER LEVEL RIDGE IS OVER THE W CARIBBEAN 
PRODUCING SW FLOW WITH CONSIDERABLE UPPER LEVEL MOISTURE OVER 
THE E CARIBBEAN.  STRONG SUBSIDENCE IS OVER THE CARIBBEAN AND 
CENTRAL AMERICA. EXPECT CONTINUED SHOWERS OVER THE WINDWARD 
ISLANDS OVER THE NEXT 24 HOURS. 
 
ATLANTIC OCEAN...
A SURFACE TROUGH IS OVER THE W ATLANTIC ALONG 32N47W 25N50W 
22N60W. BROKEN TO OVERCAST COLD AIR STRATOCUMULUS CLOUDS ARE 
BEHIND THE TROUGH TO 72W...N OF 22N. ANOTHER SURFACE TROUGH IS 
FURTHER E FROM 32N44W TO E OF BARBADOS ALONG 20N50W 11N58W. 
SCATTERED MODERATE CONVECTION IS FROM 28N-32N BETWEEN 43W-46W. 
SCATTERED SHOWERS ARE WITHIN 90 NM OF THE REMAINDER OF THE 
TROUGH. A 1010 MB LOW IS CENTERED W OF THE CANARY ISLANDS NEAR 
30N20W. SCATTERED SHOWERS ARE WITHIN 180 NM E OF THE LOW CENTER. 
IN THE UPPER LEVELS...A RIDGE IS OVER THE W ATLANTIC W OF 75W. A 
TROUGH IS OVER THE W ATLANTIC N OF 20N BETWEEN 45W-75W. AN UPPER 
LEVEL RIDGE IS OVER THE CENTRAL ATLANTIC BETWEEN 30W-45W. AN 
UPPER LEVEL LOW IS OVER THE E ATLANTIC NEAR 29N20W. EXPECT...THE 
TWO SURFACE TROUGHS TO MOVE E OVER THE NEXT 24 HOURS WITH 
SHOWERS. 

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FORMOSA