401  
AXNT20 KNHC 012358  
TWDAT  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
758 PM EDT WED NOV 1 2017  
 
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  
2345 UTC.  
   
.ITCZ/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 09N13W TO  
09N16W. THE INTERTROPICAL CONVERGENCE ZONE BEGINS NEAR 06N26W AND  
THEN CONTINUES ALONG 06N38W TO 04N48W. A SURFACE TROUGH RACES WEST  
ACROSS THE ITCZ WITH AXIS EXTENDING FROM 10N24W TO 02N26W,  
GENERATING SCATTERED HEAVY SHOWERS AND TSTMS FROM 02N-11N BETWEEN  
21W-30W. FRESH TO LOCALLY STRONG WINDS ARE WITHIN 105 NM E OF THE  
TROUGH AXIS. OTHERWISE, SCATTERED MODERATE CONVECTION AND ISOLATED  
TSTMS ARE ELSEWHERE FROM 02N-10N BETWEEN 30W-47W.  
   
..DISCUSSION
 
 
GULF OF MEXICO...  
 
AN ELONGATED SURFACE RIDGE COVERS THE FAR NW ATLC WATERS EXTENDING  
SW ACROSS FLORIDA INTO THE GULF WHERE IT PROVIDES LIGHT TO GENTLE  
RETURN FLOW IN THE EASTERN HALF OF THE BASIN AND MODERATE SE FLOW  
W OF 90W. MODERATE WINDS ARE ALSO IN THE STRAITS OF FLORIDA WHILE  
LOCALLY FRESH S WINDS ARE NOTED IN THE NW GULF. FAIR WEATHER  
PREVAILS BASIN-WIDE BEING SUPPORTED BY VERY DRY ALOFT. NO MAJOR  
CHANGES EXPECTED THROUGH SATURDAY.  
 
CARIBBEAN SEA...  
 
A SURFACE TROUGH, REMNANTS OF A STATIONARY FRONT, CONTINUES TO  
MOVE W ACROSS THE NW BASIN WITH AXIS EXTENDING FROM 21N81W TO  
HONDURAS NEAR 15N85W. SCATTERED SHOWERS AND ISOLATED TSTMS ARE  
WITHIN 90 NM W OF THE TROUGH. A SECOND TROUGH IS IN THE SW BASIN  
ALONG NICARAGUA, COSTA RICA AND NORTHERN PANAMA ADJACENT WATERS  
FROM 15N82W TO 08N82W. ISOLATED SHOWERS ARE WITHIN 75 NM W OF THE  
TROUGH AXIS. THE TAIL OF A DISSIPATING STATIONARY FRONT N OF THE  
AREA EXTENDS TO THE WINDWARD PASSAGE SUPPORTING ISOLATED SHOWERS.  
THE TAIL OF A SURFACE TROUGH AHEAD OF THAT FRONT REACHES CENTRAL  
HISPANIOLA, THUS SUPPORTING ISOLATED SHOWERS MAINLY ALONG THE  
SOUTHERN HALF OF THE ISLAND. MODERATE TO LOCALLY FRESH WINDS ARE  
IN THE VICINITY OF THE TROUGH IN THE NW CARIBBEAN WHILE MODERATE  
TRADES ARE ELSEWHERE. SHOWERS WILL CONTINUE THROUGH THU NIGHT IN  
THE NW CARIBBEAN AND THROUGH THU MORNING ACROSS HISPANIOLA. LITTLE  
CHANGE IS EXPECTED ELSEWHERE THROUGH FRIDAY.  
   
..HISPANIOLA
 
 
THE TAIL OF A DISSIPATING STATIONARY FRONT N OF THE  
AREA EXTENDS TO THE WINDWARD PASSAGE SUPPORTING ISOLATED SHOWERS.  
THE TAIL OF A SURFACE TROUGH AHEAD OF THAT FRONT REACHES CENTRAL  
HISPANIOLA, THUS SUPPORTING ISOLATED SHOWERS MAINLY ALONG THE  
SOUTHERN HALF OF THE ISLAND. SHOWERS WILL CONTINUE THROUGH THU  
MORNING ACROSS THE ISLAND.  
 
ATLANTIC OCEAN...  
 
A DISSIPATING STATIONARY FRONT EXTENDS FROM 30N67W SW TO THE  
WINDWARD PASSAGE GENERATING ISOLATED SHOWERS WITHIN 165 NM EITHER  
SIDE OF THE BOUNDARY. A SURFACE TROUGH IS AHEAD OF THE FRONT FROM  
26N67W TO CENTRAL HISPANIOLA. IN THE CENTRAL ATLC, A 1013 MB LOW  
IS CENTERED NEAR 28N51W WITH ASSOCIATED TROUGH EXTENDING FROM  
31N51W TO THE LOW TO 23N53W. SURFACE RIDGING COVERS THE REMAINDER  
EASTERN ATLC, HOWEVER A MIDDLE TO UPPER LEVEL DIFFLUENT  
ENVIRONMENT SUPPORT SCATTERED SHOWERS AND TSTMS FROM 14N-30N  
BETWEEN 30W-50W.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT  
HTTP://WWW.HURRICANES.GOV/MARINE  
 

 
RAMOS  
 
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