000
AXNT20 KNHC 172345
TWDAT 

TROPICAL WEATHER DISCUSSION 
NWS NATIONAL HURRICANE CENTER MIAMI FL 
705 PM EST WED DEC 17 2014

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 
2315 UTC.

...THE ITCZ/THE MONSOON TROUGH...                                

THE MONSOON TROUGH CROSSES THE AFRICAN COAST NEAR 08N13W AND 
CONTINUES OVER THE EASTERN ATLANTIC TO NEAR 05N21W. THE ITCZ 
BEGINS AT 05N21W AND CONTINUES TO 03N30W TO 05N46W TO THE COAST 
OF SOUTH AMERICA AT 01N50W. SCATTERED MODERATE CONVECTION IS 
FROM 3N-7N BETWEEN 39W-45W. 
 
...DISCUSSION...

GULF OF MEXICO... 

AS OF 2100 UTC...A COLD FRONT TRAVERSES CENTRAL FLORIDA FROM 
FORT PIERCE TO VENICE. A STATIONARY FRONT CONTINUES TO THE 
CENTRAL GULF OF MEXICO ALONG 25N87W 25N30W. A WARM FRONT 
CONTINUES TO NEAR FREEPORT TEXAS AT 29N96W. RADAR IMAGERY SHOWS 
THE WHOLE FRONTAL SYSTEM IS VOID OF PRECIPITATION. 5-10 KT 
NORTHERLY WINDS ARE NOTED ON N OF THE FRONT...WHILE 10-15 KT E 
TO SE WINDS ARE S OF THE FRONT. MOSTLY FAIR WEATHER IS NOTED 
THROUGHOUT THE GULF. IN THE UPPER LEVELS...AN UPPER LEVEL RIDGE 
IS OVER THE GULF WITH AXIS ALONG 90W. UPPER LEVEL MOISTURE IS 
OVER THE N GULF N OF 26N WITH STRONG SUBSIDENCE OVER THE S GULF. 
EXPECT IN 24 HOURS FOR THE FRONTAL SYSTEM TO DISSIPATE AND FOR 
SCATTERED SHOWERS TO BE ALONG THE TEXAS AND NE MEXICO COASTS DUE 
TO RETURN SE LOW LEVEL FLOW. 

CARIBBEAN SEA...   

AS OF 2100 UTC...THE TAIL END OF A DISSIPATING STATIONARY FRONT 
EXTENDS FROM THE LEEWARD ISLANDS AT 17N60W TO S OF HISPANIOLA AT 
17N74. ISOLATED MODERATE CONVECTION REMAINS S OF HISPANIOLA FROM 
15N-17N BETWEEN 73W-77W. SCATTERED SHOWERS ARE ELSEWHERE ALONG 
THE COASTS OF NICARAGUA AND COSTA RICA FROM 10N-14N BETWEEN 80W-
84W. IN THE UPPER LEVELS...AN UPPER LEVEL TROUGH IS OVER THE W 
CARIBBEAN W OF 80W. ZONAL FLOW IS OVER THE REMAINDER OF THE 
CARIBBEAN. STRONG SUBSIDENCE IS OVER THE NW CARIBBEAN. UPPER 
LEVEL CLOUDINESS IS OVER THE FRONT AND SW CARIBBEAN. EXPECT OVER 
THE NEXT 24 HOURS FOR THE FRONT TO FULLY DISSIPATE.
                             
HISPANIOLA...                   

AS OF 2100 UTC...THE TAIL END OF A STATIONARY FRONT IS S OF THE 
ISLAND WITH CONVECTION. EXPECT FAIR WEATHER OVER THE ISLAND FOR 
THE NEXT 24 HOURS.  
 
ATLANTIC OCEAN...   

AS OF 2100 UTC...A COLD FRONT IS OVER THE W ATLANTIC FROM 30N70W 
TO FORT PIERCE FLORIDA AT 27N80W. THE FRONT VOID OF 
PRECIPITATION. A 1020 MB HIGH IS OVER THE CENTRAL ATLANTIC NEAR 
30N56W. A COLD FRONT IS OVER THE CENTRAL ATLANTIC FROM 30N42W TO 
20N50W TO THE LEEWARD ISLANDS AT 17N60W. WIDELY SCATTERED 
MODERATE CONVECTION IS FROM 21N-30N BETWEEN 41W-48W. A LARGE 
1034 MB HIGH IS CENTERED E OF THE AZORES NEAR 39N20W. OF NOTE IN 
THE UPPER LEVELS...AN UPPER LEVEL LOW IS CENTERED NEAR 24N50W 
ENHANCING CONVECTION E OF THE CENTER. EXPECT THE WESTERN 
ATLANTIC COLD FRONT TO CONTINUE TO MOVE E OVER THE NEXT 24 HOURS 
...WHILE THE CENTRAL ATLANTIC FRONT BECOMES STATIONARY WITH 
CONTINUED CONVECTION.
 
FOR ADDITIONAL INFORMATION PLEASE VISIT 
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORMOSA