000
AXNT20 KNHC 272358
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL  
805 PM EDT SAT MAR 27 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 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2315 UTC...

...ITCZ...

ITCZ AXIS IS CENTERED ALONG 6N10W 3N20W CROSSING THE EQUATOR 
NEAR 32W AND INTO NE BRAZIL NEAR 3S39W. ISOLATED MODERATE 
CONVECTION IS FROM 1N-4N BETWEEN 32W-39W.

...DISCUSSION...

GULF OF MEXICO...
A 1030 MB HIGH IS CENTERED OVER VERMONT NEAR 44N73W. A RIDGE 
AXIS EXTENDS S TO N FLORIDA NEAR 30N82W AND CONTINUES TO THE SW 
GULF OF MEXICO NEAR 22N95W. 10 KT SE TO S SURFACE WINDS AND 
MOSTLY FAIR WEATHER DOMINATES THE GULF. A PATCH OF BROKEN LOW 
CLOUDS THE REMNANTS OF A DISSIPATED STATIONARY FRONT IS HOWEVER 
OVER THE CENTRAL GULF FROM 24N-26N BETWEEN 83W-95W. A COLD FRONT 
IS INLAND OVER CENTRAL TEXAS MOVING W. IN THE UPPER LEVELS 
...ZONAL FLOW IS OVER THE GULF. STRONG SUBSIDENCE IS OVER THE 
AREA EXCEPT OVER THE NW GULF AND N MEXICO FROM 24N-26W W OF 90W 
WHERE UPPER LEVEL MOISTURE IS NOTED. A 90-110 KT JETSTREAM IS 
OVER THE GULF N OF 25N. EXPECT IN 24 HOURS FOR THE COLD FRONT TO 
EXTEND FROM THE FLORIDA PANHANDLE TO THE BAY OF CAMPECHE WITH 
RAIN AND SHOWERS. 

CARIBBEAN SEA...
AS OF 2100 UTC...A PREFRONTAL TROUGH EXTENDS S TO HISPANIOLA. 
BROKEN LOW CLOUDS AND SCATTERED SHOWERS ARE OVER THE HIGHER 
ELEVATIONS OF THE ISLAND. MORE SHOWERS ARE OVER THE LEEWARD 
ISLANDS E OF THE VIRGIN ISLANDS N OF 15N E OF 65W. MOSTLY FAIR 
WEATHER IS OVER THE REMAINDER OF THE CENTRAL AMERICA AND THE 
CARIBBEAN SEA. FRESH TO STRONG TRADEWINDS DOMINATE THE MAJORITY 
OF THE CARIBBEAN WITH STRONGEST WINDS ALONG THE COAST OF N 
COLOMBIA. IN THE UPPER LEVELS...A BROAD UPPER LEVEL RIDGE IS 
OVER THE CARIBBEAN PRODUCING MOSTLY 30-50 KT UPPER LEVEL 
WESTERLY FLOW AND STRONG SUBSIDENCE. EXPECT IN 24 HOURS FOR 
LITTLE CHANGE.    

ATLANTIC OCEAN...
A COLD FRONT IS OVER THE W ATLANTIC FROM 32N61W TO THE CENTRAL 
BAHAMAS ALONG 27N66W 24N78W. SCATTERED SHOWERS ARE WITHIN 30 NM 
OF THE FRONT. A 1023 MB HIGH IS CENTERED OVER THE CENTRAL 
ATLANTIC NEAR 30N42W. A COLD FRONT IS OVER THE E ATLANTIC FROM 
32N28W TO 28N33W. SCATTERED SHOWERS ARE WITHIN 30 NM OF THE 
FRONT. IN THE TROPICS A WEAK 1017 MB LOW IS CENTERED NEAR 
20N49W. IN THE UPPER LEVELS... ZONAL FLOW IS OVER THE W ATLANTIC 
N OF 20N W OF 70W. AN UPPER LEVEL RIDGE IS OVER THE W ATLANTIC 
BETWEEN 45W-70W. AN UPPER LEVEL TROUGH IS OVER THE CENTRAL 
ATLANTIC N OF 10N BETWEEN 30W-45W. AN UPPER LEVEL RIDGE IS OVER 
THE E ATLANTIC N OF 10N E OF 30W. EXPECT IN 24 HOURS FOR...THE W 
ATLANTIC COLD FRONT TO EXTEND FROM 32N50W TO 20N57W WITH RAIN 
AND SHOWERS. ALSO EXPECT THE CENTRAL ATLANTIC COLD FRONT TO 
EXTEND FROM 32N20W TO 25N25W WITH SHOWERS.
 
FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA