963  
AGXX40 KNHC 111827  
MIMATS  
 
MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
227 PM EDT SUN APR 11 2021  
 
MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO, CARIBBEAN SEA,  
AND TROPICAL NORTH ATLANTIC FROM 07N TO 19N BETWEEN 55W AND 64W  
AND THE SOUTHWEST NORTH ATLANTIC INCLUDING THE BAHAMAS  
   
..GULF OF MEXICO
 
 
A WEAK COLD FRONT OVER THE NORTHERN GULF WILL MOVE EASTWARD,  
REACHING FROM NORTH FLORIDA TO THE EAST-CENTRAL GULF BY LATE  
TONIGHT. IT WILL WEAKEN FURTHER TO A TROUGH AS IT REACHES THE  
SOUTHEASTERN GULF MON AND DISSIPATES LATE MON. AN UPPER- LEVEL  
TROUGH WILL HELP GENERATE SCATTERED SHOWERS AND THUNDERSTORMS  
OVER MOST OF THE EASTERN GULF WATERS TODAY. SOME OF THIS  
ACTIVITY MAY CONTAIN FREQUENT LIGHTNING AND STRONG GUSTY WINDS.  
 
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN  
55W AND 64W...  
 
AN ASHFALL ADVISORY IS IN EFFECT FOR LA SOUFRIERE VOLCANO ON THE  
ISLAND OF ST. VINCENT NEAR 13.3N 61.2W. MARINERS TRANSITING THE  
WATERS UNDER THE EMITTED ASH SHOULD EXERCISE CAUTION. FRESH  
SOUTHEAST WINDS WILL CONTINUE OVER THE NORTHWESTERN CARIBBEAN  
THROUGH THE PERIOD, WHILE FRESH TO STRONG EAST TO SOUTHEAST  
WINDS CONTINUE IN THE GULF OF HONDURAS. WINDS WILL PULSE TO  
STRONG SPEEDS OVER A SMALL AREA NEAR THE COAST OF COLOMBIA  
DURING THE AFTERNOONS AND AT NIGHT THROUGH WED. ELSEWHERE,  
GENERALLY MODERATE TO FRESH EAST WINDS WILL CHANGE LITTLE  
THROUGH THU NIGHT.  
   
..SW N ATLANTIC INCLUDING THE BAHAMAS
 
 
FRESH TO STRONG SOUTHERLY WINDS EAST OF FLORIDA WILL SHIFT  
EASTWARD THROUGH MON AHEAD OF A COLD FRONT THAT WILL MOVE OFF  
THE SOUTHEASTERN U.S. COAST TONIGHT. THE FRONT WILL REACH FROM  
NEAR 31N75W TO EAST-CENTRAL FLORIDA EARLY MON, FROM NEAR 31N70W  
TO THE CENTRAL BAHAMAS AND TO EAST-CENTRAL CUBA MON EVENING AND  
THE SOUTHEAST WATERS BY LATE TUE. THE FRONT WILL MOVE EAST OF  
THE FORECAST WATERS ON WED AS WEAK HIGH PRESSURE BUILDS IN  
BEHIND IT. ANOTHER COLD FRONT IS EXPECTED TO CROSS THE  
NORTHWEST AND NORTH- CENTRAL WATERS BEGINNING TUE. FRESH TO  
STRONG SOUTHWEST WINDS ARE EXPECTED TO PRECEDE THIS FRONT.  
SCATTERED TO NUMEROUS SHOWERS AND THUNDERSTORMS, SOME STRONG TO  
SEVERE, ARE EXPECTED TO PUSH OFF THE FLORIDA COAST TODAY.  
 

 
   
WARNINGS
 
ANY CHANGES IMPACTING COASTAL NWS OFFICES WILL BE  
COORDINATED THROUGH AWIPS II COLLABORATION CHAT, OR BY  
TELEPHONE:  
   
GULF OF MEXICO
 
 
NONE.  
 
.CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN  
55W AND 64W...   
AMZ027
 
TROPICAL N ATLANTIC FROM 15N TO 19N BETWEEN 55W AND  
60W...  
ASHFALL ADVISORY TODAY INTO TUE.    
AMZ035
 
OFFSHORE WATERS WINDWARD ISLANDS INCLUDING TRINIDAD  
AND TOBAGO...  
ASHFALL ADVISORY TODAY INTO TUE.    
AMZ037
 
TROPICAL N ATLANTIC FROM 07N TO 15N BETWEEN 55W AND  
65W...  
ASHFALL ADVISORY TODAY INTO TUE.  
   
SW N ATLANTIC INCLUDING THE BAHAMAS
 
 
NONE.  
 

 
 
*FOR DETAILED ZONE DESCRIPTIONS, PLEASE VISIT:  
HTTP://WWW.NHC.NOAA.GOV/ABOUTTAFBPROD.SHTML#OWF  
 
NOTE: GRIDDED MARINE FORECASTS ARE AVAILABLE IN THE NATIONAL  
DIGITAL FORECAST DATABASE (NDFD) AT:  
HTTP://WWW.NHC.NOAA.GOV/MARINE/GRIDS.PHP  
 
FOR ADDITIONAL INFORMATION, PLEASE VISIT:  
HTTP://WWW.NHC.NOAA.GOV/MARINE  
 

 
 
.FORECASTER LATTO. NATIONAL HURRICANE CENTER.  
 
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