000
AXNT20 KNHC 102337
TWDAT 

TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL 
805 PM EDT WED APR 10 2013

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 FROM THE COAST OF GUINEA NEAR 10N14W 
TO 7N18W. THE INTERTROPICAL CONVERGENCE ZONE EXTENDS FROM 7N18W 
TO 1N30W TO THE COAST OF BRAZIL NEAR 2S43W. ISOLATED MODERATE 
CONVECTION IS S OF THE MONSOON TROUGH AND S OF LIBERIA FROM 3S-
3N BETWEEN 10W-13W. WIDELY SCATTERED MODERATE CONVECTION IS 
ALONG THE ITCZ FROM 3S-4N BETWEEN 27W-43W.  

...DISCUSSION...

GULF OF MEXICO...   

AS OF 2100 UTC...A COLD FRONT IS OFF THE COAST OF CORPUS 
CHRISTIE TEXAS FROM 29N95W TO 27N97W TO N MEXICO AT 27N100W TO 
THE BIG BEND OF TEXAS AT 29N103W. SCATTERED SHOWERS ARE WITHIN 
60 NM OF THE FRONT OVER THE GULF OF MEXICO. A TWENTY DEGREE 
TEMPERATURE DROP IS NOTED ACROSS THE FRONT. 20-25 KT NORTHERLY 
WINDS ARE NW OF THE FRONT. 10-20 KT SW SURFACE FLOW IS OVER THE 
REMAINDER OF THE GULF. ELSEWHERE...RADAR IMAGERY SHOWS 
THUNDERSTORMS INLAND OVER S FLORIDA E OF FORT MYERS. IN THE 
UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER TEXAS... WHILE AN 
UPPER LEVEL RIDGE IS OVER THE GULF WITH AXIS ALONG 90W. EXPECT 
IN 24 HOURS FOR THE COLD FRONT TO EXTEND FRON E LOUISIANA TO THE 
BAY OF CAMPECHE NEAR VERACRUZ MEXICO WITH CONVECTION. 20-30 KT N 
WINDS WILL CONTINUE NW OF FRONT.
 
CARIBBEAN SEA... 

15-30 KT TRADEWINDS ARE OVER THE CARIBBEAN SEA WITH STRONGEST 
WINDS ALONG THE COAST OF COLOMBIA. A 1006 MB LOW IS CENTERED 
OVER N COLOMBIA NEAR 7N73W WITH WIDELY SCATTERED MODERATE 
CONVECTION INLAND. SCATTERED MODERATE CONVECTION IS OVER THE 
HIGHER ELEVETIONS OF CUBA BETWEEN 75W-82W. SCATTERED SHOWERS ARE 
OVER THE HIGHER ELEVATIONS OF PUERTO RICO...HISPANIOLA...AND 
JAMAICA. MORE SHOWERS ARE OVER THE LEEWARD AND WINDWARD ISLANDS. 
IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE OVER CENTRAL AMERICA 
IS PRODUCING WNW UPPER LEVEL WINDS OVER THE CARIBBEAN SEA. 
STRONG SUBSIDENCE IS OVER THE CARIBBEAN SEA. EXPECT LITTLE 
CHANGE OVER THE NEXT 24 HOURS.

ATLANTIC OCEAN...  

A 1025 MB HIGH IS CENTERED OVER THE W ATLANTIC NEAR 31N63W. A 
COLD FRONT IS OVER THE E ATLANTIC FROM 32N30W TO 29N37W. A 
STATIONARY FRONT CONTINUES FROM 29N37W TO 25N50W TO N OF PUERTO 
RICO AT 22N65W. SCATTERED SHOWERS AND ISOLATED THUNDERSTORMS ARE 
WITHIN 90 NM OF THE FRONTS. A 1021 MB HIGH IS OVER THE E 
ATLANTIC NEAR 27N26W. OF NOTE IN THE UPPER LEVELS...AN UPPER 
LEVEL TROUGH IS OVER THE CENTRAL ATLANTIC N OF 20N BETWEEN 30W-
70W SUPPORTING THE ATLANTIC FRONTAL SYSTEM. EXPECT IN 24 HOURS 
FOR SCATTERED SHOWERS TO BE OVER THE BAHAMAS. ALSO EXPECT THE 
COLD FRONT TO CONTINUE TO MOVE E WITH SHOWERS AND CONVECTION. 

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

$$
FORMOSA