635  
AXNT20 KNHC 010515  
TWDAT  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
115 AM 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 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH  
0515 UTC.  
   
.ITCZ/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 11N14W TO  
08N19W. THE INTERTROPICAL CONVERGENCE ZONE EXTENDS FROM 08N19W TO  
07N40W TO 08N50W. SCATTERED MODERATE CONVECTION IS ALONG THE COAST  
OF W AFRICA FROM 04N-11N BETWEEN 10W-15W.  
   
..DISCUSSION
 
 
GULF OF MEXICO...  
 
A 1022 MB HIGH IS CENTERED OFF THE COAST OF VIRGINIA NEAR 37N71W.  
SURFACE RIDGING EXTENDS SW TO THE NE GULF OF MEXICO. THE W GULF  
HAS 15-20 KT SE SURFACE FLOW. A QUASI-STATIONARY FRONT IS JUST  
INLAND OF THE TEXAS COAST. SCATTERED SHOWERS ARE NOTED ON RADAR  
OVER THE W GULF N OF 25N AND W OF 93W. MOSTLY FAIR WEATHER IS OVER  
THE REMAINDER OF THE GULF. IN THE UPPER LEVELS, ZONAL FLOW  
PREVAILS WITH STRONG SUBSIDENCE. EXPECT SHOWERS TO PERSIST OVER  
THE NW GULF FOR THE NEXT 24 HOURS. ALSO EXPECT THE TEXAS FRONT TO  
LIFT N AND DISSIPATE OVER THE NEXT 24 HOURS.  
 
CARIBBEAN SEA...  
 
A STATIONARY FRONT EXTENDS FROM N HISPANIOLA AT 20N70W TO JAMAICA  
AT 18N77W. SCATTERED SHOWERS ARE WITHIN 90 NM OF THE FRONT.  
ELSEWHERE, A TROUGH IS OVER THE W CARIBBEAN FROM 17N80W TO  
10N83W. SCATTERED SHOWERS ARE WITHIN 60 NM W OF THE TROUGH. IN THE  
UPPER LEVELS, A LARGE UPPER LEVEL HIGH IS CENTERED JUST N OF  
HISPANIOLA NEAR 21N73W. STRONG SUBSIDENCE IS OVER THE E CARIBBEAN  
AND THE S CARIBBEAN. EXPECT THE FRONT TO DISSIPATE TO A SHEAR  
LINE OVER THE NEXT 24 HOURS. ALSO EXPECT MORE SHOWERS OVER THE W  
CARIBBEAN AND CENTRAL AMERICA OVER THE NEXT 24 HOURS.  
   
..HISPANIOLA
 
 
SCATTERED SHOWERS ARE OVER THE ISLAND DUE TO THE STATIONARY FRONT.  
EXPECT SHOWERS FOR THE NEXT 24 HOURS.  
 
ATLANTIC OCEAN...  
 
A STATIONARY FRONT IS OVER THE W ATLANTIC FROM 31N65W TO N  
HISPANIOLA AT 20N70W. SCATTERED SHOWERS ARE WITHIN 90 NM OF THE  
FRONT. A 1012 MB LOW IS CENTERED OVER THE CENTRAL ATLANTIC NEAR  
30N48W. A SURFACE TROUGH EXTENDS S FORM THE LOW TO 21N58W.  
OF NOTE IN THE UPPER LEVELS, AN UPPER LEVEL LOW IS CENTERED OVER  
THE CENTRAL ATLANTIC NEAR 27N48W. UPPER LEVEL DIFFLUENCE IS SE OF  
THIS LOW. EXPECT THE FRONT TO DRIFT W OVER THE NEXT 24 HOURS WITH  
SHOWERS.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT  
HTTP://WWW.HURRICANES.GOV/MARINE  
 

 
FORMOSA  
 
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