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Atlantic Tropical Weather Discussion



000
AXNT20 KNHC 221804
TWDAT 

TROPICAL WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 PM EST MON DEC 22 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 1200 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
1715 UTC.

...SPECIAL FEATURE...

...GALE-FORCE WINDS ARE FORECAST IN THE GULF OF MEXICO...

A COLD FRONT...THAT CURRENTLY IS ORGANIZING ITSELF IN THE 
NORTHERN SECTIONS OF TEXAS...IS FORECAST TO MOVE OFF THE TEXAS 
GULF OF MEXICO COAST ON TUESDAY AFTERNOON. 

THE 42-HOUR FORECAST SHOWS THAT THE COLD FRONT WILL EXTEND FROM 
30N92W TO 22N97W.  GALE-FORCE NORTHWEST WINDS AND SEA HEIGHTS TO 
8 FEET WILL COVER THE GULF OF MEXICO TO THE SOUTH OF 26N TO THE 
WEST OF THE FRONT.

PLEASE READ THE HIGH SEAS FORECAST...MIAHSFAT2/FZNT02 KNHC...AND 
THE OFFSHORE FORECAST...MIAOFFNT4/FZNT24 KNHC...FOR MORE 
DETAILS.  

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

THE MONSOON TROUGH PASSES THROUGH THE COASTAL SECTIONS OF SIERRA 
LEONE NEAR 8N13W TO  8N14W. THE ITCZ CONTINUES FROM 8N14W TO 
8N27W 5N34W 6N40W AND 3N45W. CONVECTIVE PRECIPITATION...NUMEROUS 
STRONG FROM 5N TO 7N BETWEEN 36W AND 41W. WIDELY SCATTERED 
MODERATE TO ISOLATED STRONG ELSEWHERE FROM 10N SOUTHWARD FROM 
60W EASTWARD.

...DISCUSSION...

...FROM THE WESTERN ATLANTIC OCEAN...ACROSS FLORIDA...INTO THE 
GULF OF MEXICO...AND INCLUDING THE REST OF THE GULF OF MEXICO...

A MIDDLE LEVEL TO UPPER LEVEL TROUGH IS DEVELOPING IN THE 
CENTRAL SECTIONS OF THE U.S.A. THIS TROUGH IS ORGANIZING ITSELF 
AND IT EVENTUALLY WILL BE SUPPORTING THE COLD FRONT THAT IS 
FORECAST TO MOVE INTO THE NORTHWESTERN GULF OF MEXICO WATERS ON 
TUESDAY AFTERNOON. THIS IS THE COLD FRONT THAT WILL BRING GALE-
FORCE WINDS INTO THE GULF OF MEXICO. PLEASE READ THE SPECIAL 
FEATURES SECTION. 

CURRENTLY...A STATIONARY FRONT EXTENDS FROM AN ATLANTIC OCEAN 
1014 MB LOW PRESSURE CENTER THAT IS NEAR 32N78W...TO GEORGIA 
NEAR 31N81W. A WARM FRONT CONTINUES FROM SOUTHEASTERN 
GEORGIA...ACROSS THE FLORIDA PANHANDLE NEAR 30N85W...IN THE 
NORTHERN GULF OF MEXICO WATERS AND COASTAL PLAINS...ACROSS 
SOUTHEASTERN LOUISIANA...TO THE TEXAS GULF COAST ALONG 95W FROM 
29N TO 30N. LOW LEVEL CLOUD CEILINGS AND AREAS OF RAIN SHOWERS 
ARE IN THE U.S.A. GULF OF MEXICO COASTAL PLAINS. CONVECTIVE 
PRECIPITATION IN THE ATLANTIC OCEAN...BROKEN TO OVERCAST 
MULTILAYERED CLOUDS AND POSSIBLE RAINSHOWERS ARE TO THE 
NORTHWEST OF THE LINE 26N80W 27N70W BEYOND 32N60W.

MIDDLE LEVEL TO UPPER LEVEL SOUTHWESTERLY WIND FLOW SPANS THE 
GULF OF MEXICO.

FOR THE OFFSHORE OIL PLATFORM SITES THAT ARE TO THE NORTH OF 27N 
TO THE WEST OF 88W...

LOW LEVEL CLOUD CEILINGS ARE BEING REPORTED AT...KVAF...KGBK...
KATP...AND KSPR.

LOW LEVEL CLOUD CEILINGS AND WEATHER...FOR THE COASTAL PLAINS OF 
THE U.S.A. FROM THE DEEP SOUTH OF TEXAS TO FLORIDA...

LOW LEVEL CLOUD CEILINGS AND VISIBILITIES OF 3 MILES OR LESS AND 
FOG COVER THE INTERIOR LOCATIONS OF THE DEEP SOUTH OF TEXAS. LOW 
LEVEL CLOUD CEILINGS COVER THE REST OF THE COASTAL PLAINS OF 
TEXAS...INTO LOUISIANA...AND EVENTUALLY TO THE FLORIDA 
PANHANDLE. AREAS OF RAINSHOWERS...SOME WITH THUNDER...ARE IN 
MISSISSIPPI AND IN THE FLORIDA PANHANDLE...FROM PERRY FLORIDA 
WESTWARD. THE WARM FRONT IS IN THE NORTHERN GULF OF MEXICO... 
FROM THE AREA OF THE UPPER TEXAS GULF COAST TO THE WESTERN 
SECTIONS OF THE FLORIDA PANHANDLE. LOW LEVEL CLOUD CEILINGS 
CONTINUE FROM BROOKSVILLE FLORIDA TO THE TAMPA-SAINT PETERSBURG 
METROPOLITAN AREA...AND TO PUNTA GORDA FLORIDA.

...THE CARIBBEAN SEA...

A MIDDLE LE


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Page last modified: Monday, 22-Dec-2014 18:04:49 UTC