000
AXNT20 KNHC 282310
TWDAT 

TROPICAL WEATHER DISCUSSION NWS 
NATIONAL HURRICANE CENTER MIAMI FL 
205 PM EDT MON APR 28 2014

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...WEATHER OBSERVATIONS...RADAR...AND METEOROLOGICAL 
ANALYSIS.

BASED ON 1800 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
2315 UTC.

...ITCZ/MONSOON TROUGH...                                     
THE MONSOON TROUGH EXTENDS ACROSS AFRICA INTO THE E TROPICAL 
ATLC NEAR 12N16W AND CONTINUES TO 7N20W TO 5N24W. THE ITCZ 
CONTINUES FROM 5N24W TO 00N34W TO SOUTH AMERICA NEAR 1S46W. 
SCATTERED MODERATE/ISOLATED STRONG CONVECTION IS NEAR THE PRIME 
MERIDIAN FROM 3N-1S BETWEEN 0W-3W. SIMILAR CONVECTION IS FROM 4N-
2S BETWEEN 23W-33W.  

...DISCUSSION...
 
GULF OF MEXICO...                                                

AS OF 2100 UTC THE TAIL END OF A COLD FRONT IS ALONG THE TEXAS 
COAST EXTENDING FROM HOUSTON TO BROWNSVILLE. THE FRONT IS MOSTLY 
VOID OF CONVECTION. ONLY 10 KT NORTHERLY WINDS ARE N OF THE 
FRONT. A PRE-FRONTAL TROUGH EXTENDS FROM 27N95W TO TAMPICO 
MEXICO. SCATTERED SHOWERS ARE WITHIN 45 NM SE OF THE TROUGH. 
ELSEWHERE SCATTERED MODERATE CONVECTION IS OVER W CUBA...THE 
STRAITS OF FLORIDA...AND CENTRAL FLORIDA. THE REMAINDER OF THE 
GULF HAS 10-15 KT SOUTHERLY RETURN FLOW WITH MOSTLY FAIR 
WEATHER. IN THE UPPER LEVELS...50-70 KT ZONAL FLOW PREVAILS WITH 
STRONG SUBSIDENCE. EXPECT THE FRONT OVER THE NEXT 24 HOURS TO 
BECOME STATIONARY AND WEAKEN ALONG THE TEXAS COAST WHILE SEVERE 
WEATHER WITH STRONG CONVECTION MOVES E FROM LOUISIANA TO 
GEORGIA. 

CARIBBEAN SEA...                                               

10-25 KT TRADEWINDS ARE OVER THE CARIBBEAN SEA AND CENTRAL 
AMERICA WITH STRONGEST WINDS ALONG THE N COAST OF N COLOMBIA. 
SCATTERED MODERATE CONVECTION IS ALL ALONG THE N COAST OF CUBA. 
ELSEWHERE...SCATTERED MODERATE TO ISOLATED STRONG CONVECTION IS 
INLAND OVER S GUATEMALA...OVER W PANAMA AND COSTA RICA...AND 
INLAND OVER N COLOMBIA. SCATTERED SHOWERS ARE OVER HISPANIOLA 
AND PUERTO RICO. MOSTLY FAIR WEATHER IS OVER THE REMAINDER OF 
THE CARIBBEAN SEA. IN THE UPPER LEVELS...ZONAL FLOW PREVAILS 
WITH STRONG SUBSIDENCE. EXPECT OVER THE NEXT 24 HOURS FOR 
ADDITIONAL CONVECTION TO BE OVER PANAMA...COSTA RICA...AND THE 
SW CARIBBEAN SEA.  
 
...HISPANIOLA...                                                 

SATELLITE IMAGERY SHOWS SCATTERED SHOWERS OVER CENTRAL 
HISPANIOLA. EXPECT MORE SCATTERED SHOWERS OVER THE NEXT 24 HOURS 
MAINLY OVER THE DOMINICAN REPUBLIC AND HIGHER ELEVATIONS.  
 
ATLANTIC OCEAN...                                                

A WEAK 1018 MB HIGH IS OVER THE W ATLANTIC NEAR 31N72W. THE TAIL 
END OF A COLD FRONT IS FURTHER E FROM 32N59W TO 30N67W. THIS 
PORTION OF THE FRONT IS MOSTLY VOID OF CONVECTION. A PRE-FRONTAL 
TROUGH EXTENDS FROM 31N56W TO 27N65W. THIS TROUGH IS ALSO MOSTLY 
VOID OF CONVECTION. THE TAIL END OF A STATIONARY FRONT IS OVER 
THE CENTRAL ATLANTIC FROM 31N37W TO 27N42W. SCATTERED SHOWERS 
ARE WITHIN 120 NM E OF THE FRONT. A 1023 MB HIGH IS OVER THE E 
ATLANTIC NEAR 38N17W. OF NOTE OVER THE UPPER LEVELS...A BROAD 
UPPER LEVEL TROUGH IS N OF 25N BETWEEN 40W-70W SUPPORTING THE 
SURFACE FRONTS. MOSTLY ZONAL FLOW IS OVER THE REMAINDER OF THE 
ATLANTIC FROM 10N-30N. EXPECT OVER THE NEXT 24 HOURS FOR THE W 
ATLANTIC FRONT TO SWING SE AND PRODUCE CONVECTION OVER THE 
CENTRAL ATLANTIC N OF 24N BETWEEN 45W-60W.  

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

$$ 
FORMOSA