911  
AXNT20 KNHC 311015  
TWDAT  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
615 AM EDT TUE OCT 31 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 0600 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH  
1015 UTC.  
   
..ITCZ/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 07N12W TO  
06N17W. THE INTERTROPICAL CONVERGENCE ZONE EXTENDS FROM 06N17W TO  
05N30W TO 00N50W. ISOLATED MODERATE CONVECTION IS FROM 02N-09N  
BETWEEN 10W-23W.  
   
..DISCUSSION
 
 
GULF OF MEXICO...  
 
A 1021 MB HIGH IS CENTERED OVER THE NE GULF OF MEXICO NEAR  
29N85W. 10-15 ANTICYCLONIC SURFACE WINDS ARE OVER THE GULF WITH  
MOSTLY FAIR WEATHER. AN AREA OF SCATTERED SHOWERS ARE OVER THE NW  
GULF N OF 24N AND W OF 94W. IN THE UPPER LEVELS, ZONAL FLOW  
PREVAILS WITH STRONG SUBSIDENCE. EXPECT THE SURFACE HIGH TO DRIFT  
N TO THE FLORIDA PANHANDLE. ALSO EXPECT A COLD FRONT WITH  
SCATTERED SHOWERS TO REACH THE TEXAS COAST TONIGHT, STALL, THEN  
LIFT N OF THE GULF BY WED EVENING.  
 
CARIBBEAN SEA...  
 
A STATIONARY FRONT EXTENDS FROM N HISPANIOLA AT 20N71W TO 18N78W  
TO THE GULF OF HONDURAS AT 16N88W. SCATTERED MODERATE CONVECTION  
IS WITHIN 60 NM OF THE FRONT. 15-20 KT NE WINDS ARE N OF THE  
FRONT. A PREFRONTAL TROUGH IS OVER THE CENTRAL CARIBBEAN FROM  
17N79W TO 13N80W. SCATTERED SHOWERS ARE WITHIN 60 NM W OF THE  
TROUGH. ANOTHER SURFACE TROUGH IS OVER THE ATLANTIC FROM 23N66W TO  
PUERTO RICO AT 18N66W. SCATTERED SHOWERS ARE OVER PUERTO RICO.  
ELSEWHERE, CLUSTERS OF SCATTERED MODERATE CONVECTION ARE ALONG  
THE COAST OF N COLOMBIA. EXPECT THE FRONT TO DISSIPATE TO A SHEAR  
LINE OVER THE NEXT 48 HOURS.  
   
..HISPANIOLA
 
 
SCATTERED SHOWERS ARE OVER THE ISLAND DUE TO THE STATIONARY FRONT.  
EXPECT SHOWERS FOR THE NEXT 48 HOURS.  
 
ATLANTIC OCEAN...  
 
A COLD FRONT IS OVER THE W ATLANTIC FROM 31N65W TO 23N67W TO N  
HISPANIOLA AT 20N71W. SCATTERED SHOWERS ARE WITHIN 120 NM E OF  
THE FRONT. A 1011 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC  
NEAR 30N46W. A SURFACE TROUGH EXTENDS S FORM THE LOW TO 23N51W.  
SCATTERED SHOWERS EXTEND 180 NM E OF THE TROUGH. OF NOTE IN THE  
UPPER LEVELS, AN UPPER LEVEL LOW IS CENTERED OVER THE CENTRAL  
ATLANTIC NEAR 28N47W. UPPER LEVEL DIFFLUENCE IS SE OF THIS LOW.  
EXPECT THE COLD FRONT TO STALL WITHIN THE NEXT 24 HOURS.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT  
HTTP://WWW.HURRICANES.GOV/MARINE  
 

 
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