100  
AGXX40 KNHC 211855  
MIMATS  
 
MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
255 PM EDT THU SEP 21 2017  
 
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 THERMAL TROUGH WILL DEVELOP EACH EVENING OVER THE NW YUCATAN  
PENINSULA, MOVE W-NW ACROSS THE SW GULF DURING THE OVERNIGHT  
HOURS AND DISSIPATE OVER THE SW GULF WATERS BY LATE EACH  
MORNING. EXPECT THE TROUGH TO BE ACCOMPANIED BY A MODERATE TO  
LOCALLY FRESH NE-E-SE WIND SHIFT AND BRIEF SEAS TO 4 FT. A  
SURFACE HIGH WILL MEANDER OVER THE N-CENTRAL WATERS THROUGH THU  
NIGHT, THEN SHIFT N AND INLAND LOUISIANA ON FRI WITH LIGHT TO  
LOCALLY MODERATE ANTICYCLONIC FLOW AND 1 TO 3 FT SEAS THROUGH  
MON.  
 
...CARIBBEAN SEA AND TROPICAL N ATLANTIC FROM 07N TO 19N BETWEEN  
55W AND 64W...  
 
MARINE INTERESTS SHOULD MONITOR THE LATEST NHC BULLETINS  
CONCERNING MAJOR HURRICANE MARIA CURRENTLY IN THE VICINITY OF  
PUERTO RICO, WITH THE HURRICANE FORCE RADII FORECAST TO PASS  
ALONG THE NE COAST OF HISPANIOLA TONIGHT INTO THU, WITH SEAS IN  
EXCESS OF 35 FT. STRONG OR GREATER SOUTHERLY FLOW EXPECTED  
ACROSS THE CARIBBEAN WATERS N OF 15N E OF 73W TODAY AND THU.  
EXPECT WIND/SEA CONDITIONS ACROSS THE NE PASSAGES TO DIMINISH TO  
20 KT OR LESS, AND SEAS TO SUBSIDE TO LESS THAN 8 FT ON FRI  
MORNING. FRESH N WINDS AND SEAS TO ABOUT 8 FT EXPECTED IN THE  
WINDWARD PASSAGE LATE THU NIGHT INTO FRI MORNING. ELSEWHERE,  
MODERATE TO LOCALLY FRESH TRADES WILL RETURN BY SUN EVENING.  
   
..SW N ATLANTIC INCLUDING THE BAHAMAS
 
 
MAJOR HURRICANE MARIA WILL MOVE NW OFF THE NW COAST OF PUERTO  
RICO THIS AFTERNOON PASSING N OF THE MONA PASSAGE THIS EVENING,  
THEN BEGIN TO MOVE MORE NNW AND LATER N IN RESPONSE TO A  
WEAKNESS IN THE SUBTROPICAL RIDGE. THIS TRACK KEEPS THE CENTER  
OF MARIA E OF THE CENTRAL AND NORTHERN BAHAMAS. GIVEN THAT  
FORECAST TRACK AND INTENSITY ACCURACY DECREASES FURTHER INTO THE  
FUTURE, MARINE INTERESTS THROUGHOUT THE REGION SHOULD CONTINUE  
MONITORING THE LATEST BULLETINS ISSUED BY THE NATIONAL HURRICANE  
CENTER ON HURRICANE MARIA.  
 
SOUTHERLY SWELL ASSOCIATED WITH MARIA IN EXCESS OF 8 FT WILL MIX  
WITH LINGERING NORTHERLY SWELL ASSOCIATED WITH JOSE OVER THE  
WATERS NORTH OF 28N AND E OF 78W THROUGH TONIGHT, WITH THE  
SOUTHERLY SWELL AHEAD OF MARIA BECOMING DOMINANT THROUGH EARLY  
NEXT WEEK AS MARIA CONTINUES NORTH OF THE AREA.  
 

 
   
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...   
AMZ023...CARIBBEAN N OF 15N BETWEEN 64W AND 72W
 
 
TROPICAL STORM WARNING TODAY INTO TONIGHT.  
   
SW N ATLANTIC INCLUDING THE BAHAMAS
 
   
AMZ117...BAHAMAS INCLUDING CAY SAL BANK
 
 
TROPICAL STORM WARNING THU NIGHT INTO FRI.    
AMZ119...ATLANTIC FROM 22N TO 27N E OF BAHAMAS TO 70W
 
 
TROPICAL STORM WARNING THU.  
HURRICANE WARNING THU NIGHT INTO FRI.    
AMZ121...ATLANTIC FROM 22N TO 27N BETWEEN 65W AND 70W
 
 
TROPICAL STORM WARNING THU.  
HURRICANE WARNING THU NIGHT.  
TROPICAL STORM WARNING FRI.   
AMZ123
 
ATLANTIC S OF 22N W OF 70W INCLUDING APPROACHES TO THE  
WINDWARD PASSAGE...  
TROPICAL STORM WARNING TONIGHT.  
HURRICANE WARNING THU INTO FRI.    
AMZ125
 
ATLANTIC S OF 22N BETWEEN 65W AND 70W INCLUDING PUERTO  
RICO TRENCH...  
HURRICANE WARNING TODAY INTO THU NIGHT.  
TROPICAL STORM WARNING FRI.  
 

 
 
*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 NELSON. NATIONAL HURRICANE CENTER.  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab TPC Page Main Text Page