980  
AXNT20 KNHC 242359  
TWDAT  
 
TROPICAL WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL  
805 PM EDT FRI MAR 24 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  
2115 UTC.  
   
..SPECIAL FEATURES
 
 
THE FRONTAL SYSTEM THAT IS CURRENTLY OVER THE WEST ATLANTIC WILL  
CONTINUE ENHANCING CONVECTION/SEAS THROUGH THE NEXT FEW DAYS. THE  
PRESSURE GRADIENT IS EXPECTED TO BECOME TIGHTER BY TOMORROW  
AFTERNOON SUPPORTING GALE-FORCE NORTHERLY WINDS FROM 24N-26N  
BETWEEN 66W-68W. THESE CONDITIONS WILL CONTINUE NORTH OF FRONT  
THROUGH THE WEEKEND. PLEASE SEE THE LATEST HIGH SEAS FORECAST  
PRODUCT UNDER AWIPS/WMO HEADERS HSFAT2/FZNT02 KNHC FOR MORE  
DETAILS.  
   
..ITCZ/MONSOON TROUGH
 
 
THE MONSOON TROUGH EXTENDS FROM THE AFRICAN COAST NEAR 07N12W TO  
0104N13W TO 01N18W. THE INTERTROPICAL CONVERGENCE ZONE EXTENDS  
FROM 01N18W TO THE SOUTH AMERICAN COAST NEAR 05S38W. WIDELY  
SCATTERED MODERATE CONVECTION IS WITHIN 180 NM OF THE ITCZ AXIS.  
   
..DISCUSSION
 
 
GULF OF MEXICO...  
 
A DISSIPATING STATIONARY FRONT EXTENDS FROM THE STRAITS OF  
FLORIDA NEAR 24N80W TO 25N84W TO THE FLORIDA PANHANDLE NEAR  
31N87W. FRESH TO STRONG EASTERLY WINDS ARE NORTH OF THE FRONT  
WHILE GENTLE TO MODERATE SOUTHEAST WINDS ARE DEPICTED BY  
SCATTEROMETER DATA ELSEWHERE. SEAS ARE AROUND 2 TO 4 FT IN THE  
WESTERN GULF, AND 1 TO 3 FT ELSEWHERE. NO SIGNIFICANT CONVECTION  
IS NOTED AT THIS TIME. DURING THE NEXT 24 HOURS, THE FRONT WILL  
FULLY DISSIPATE AS THE HIGH PRESSURE CENTERED OVER THE WEST  
ATLANTIC SPREADS FRESH TO STRONG EAST TO SOUTHEAST WINDS OVER  
THE GULF WATERS.  
 
CARIBBEAN SEA...  
 
A SURFACE TROUGH EXTENDS FROM A WEAK LOW CENTERED OVER THE  
ATLANTIC NORTH OF PUERTO RICO NEAR 21N63W TO THE MONA PASSAGE  
NEAR 18N68W TO 15N68W SUPPORTING CLOUDINESS AND SCATTERED  
SHOWERS WITHIN 90 NM OF THE TROUGH. SCATTERED SHOWRERS ARE ALSO  
OVER HISPANIOLA, E CUBA, NW VENEZUELA, AND N COLOMBIA. IN THE  
UPPER LEVELS, DRY AND SUBSIDENT AIR ASSOCIATED WITH A BROAD  
UPPER-LEVEL TROUGH IS INHIBITING THUNDERSTORM ACTIVITY OVER THE  
WEST AND CENTRAL CARIBBEAN. LITTLE CHANGE IS EXPECTED THROUGH  
THE NEXT 24 HOURS.  
   
..HISPANIOLA
 
 
A SURFACE TROUGH EAST OF THE ISLAND IS SUPPORTING SHOWERS AND A  
FEW THUNDERSTORMS MAINLY OVER THE EASTERN HISPANIOLA. LOCALIZED  
FLOODING COULD BE EXPECTED MAINLY ACROSS THE NORTHERN HALF OF  
THE ISLAND. A COLD FRONT WILL APPROACH WITHIN THE NEXT 24 HOURS.  
A STRONG HIGH PRESSURE WILL CONTINUE BUILDING NORTH OF THE AREA  
THIS WEEKEND WITH STRONG EASTERLY WINDS EXPECTED OVER THE  
ISLAND, AND LARGE SWELL ALONG THE ATLANTIC COASTLINE.  
 
ATLANTIC OCEAN...  
 
A FRONTAL SYSTEM EXTENDS ACROSS THE WEST AND CENTRAL ATLANTIC  
ANALYZED AS A COLD FRONT FROM 31N48W TO 25N67W, THEN AS A  
STATIONARY FRONT FROM THAT POINT TO THE STRAITS OF FLORIDA NEAR  
24N80W. SCATTERED SHOWERS ARE WITHIN 90 NM OF THE FRONTS. A  
PREFRONTAL TROUGH EXTENDS FROM 31N47W TO 26N52W TO A WEAK 1014  
MB SURFACE LOW NEAR 21N63W TO THE MONA PASSAGE NEAR 18N68W.  
SCATTERED SHOWERS ARE OBSERVED WITHIN 90 NM ON EITHER SIDE OF  
THE TROUGH. A RECENT SCATTEROMETER PASS DEPICTS A BAND OF 20-30  
KT WINDS WITHIN 100 NM NORTH OF THE COLD FRONT BETWEEN 57W- 67W.  
THIS SAME AREA IS GOING TO EXPERIENCE GALE-FORCE WINDS THIS  
WEEKEND. PLEASE REFER TO THE SECTION ABOVE FOR DETAILS. THE  
REMAINDER OF THE BASIN IS UNDER THE INFLUENCE OF A SURFACE RIDGE  
ANCHORED BY A 1030 MB HIGH CENTERED NEAR 38N28W.  
 
FOR ADDITIONAL INFORMATION PLEASE VISIT  
HTTP://WWW.HURRICANES.GOV/MARINE  
 

 
FORMOSA  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab TPC Page Main Text Page