000
AGXX40 KNHC 180755
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
300 AM EST THU JAN 18 2013

MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN 
SEA AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 
55W.

GULF OF MEXICO...
A COLD FRONT EXTENDS FROM SOUTH FLORIDA AND THE FLORIDA KEYS TO 
WESTERN CUBA. HIGH PRES IS BUILDING ACROSS THE GULF WATERS IN 
THE WAKE OF THE FRONT. THE 0220 HI-RESOLUTION ASCAT PASS SHOWED 
25-30 KT NW TO N WINDS OVER THE EASTERN GULF. BUOY 42003 WAS 
REPORTING SEAS UP TO 11 FT. THE STRONGEST WINDS ARE NEAR THE 
COAST OF THE WESTERN FLORIDA PANHANDLE. WINDS ARE ALREADY 
DIMINISHED OVER THE WESTERN GULF TO 15-20 KT. WINDS AND SEAS 
WILL CONTINUE TO DIMINISH FROM W TO E ACROSS THE ENTIRE GULF 
FRI...LEAVING GENERALLY LIGHT TO MODERATE NE TO E WINDS INTO 
EARLY MON. HIGH PRESSURE WILL STRENGTHEN BRIEFLY ON MON...THEN 
RELAX SOME ON TUE AS A SURFACE HIGH SHIFTS SE OVER THE NE 
COASTAL PLAINS. 

CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W...
FRESH TO STRONG TRADES WILL GRADUALLY DIMINISH OVER THE NEXT 24 
HOURS IN THE CENTRAL CARIBBEAN AS THE HIGH PRES LOCATED N OF 
AREA WILL MOVE EASTWARD. A COLD FRONT HAS REACHED THE WESTERN 
CARIBBEAN EXTENDING FROM WESTERN CUBA TO NEAR 16N88W. THE FRONT 
IS FORECAST TO STALL FROM CENTRAL CUBA TO EASTERN HONDURAS FRI 
AND BECOME DIFFUSE SAT. FRESH TO STRONG NW TO N WINDS WILL 
FOLLOW THE FRONT ACROSS MUCH OF THE FAR NW CARIBBEAN WITH 
BUILDING SEAS UP TO 8 TO 10 FT TODAY BEFORE GRADUALLY SUBSIDING 
TO LESS THAN 8 FT ON SAT. FRESH TO STRONG TRADES RETURN TO THE 
COAST OF COLOMBIA BY SAT AS HIGH PRES BUILDS TO THE N BEHIND THE 
COLD FRONT. IN THE TROPICAL N ATLC...A GENTLE TO MODERATE BREEZE 
WILL PREVAIL UNTIL MON WHEN BUILDING HIGH PRES TO THE N EXPANDS 
THE AREA OF FRESH TRADES AND RAISES SEAS TO 9 FT.

SW N ATLC S OF 31N W OF 55W...
A COLD FRONT HAS ENTERED THE NW WATERS AND CURRENTLY EXTENDS 
FROM A 1007 MB LOW PRES LOCATED N OF AREA NEAR 34N78W TO 31N78W 
THEN ACROSS S FLORIDA AND WESTERN CUBA. A GALE WARNING IS IN 
EFFECT THROUGH THIS EVENING ACROSS THE WATERS N OF 29N W OF THE 
FRONT. SEAS ARE FORECAST TO BUILD UP TO 13 FT IN THE WAKE OF THE 
FRONT THIS EVENING. THE COLD FRONT WILL EXTEND FROM BERMUDA TO 
CENTRAL CUBA FRI EVENING...THEN STALL FROM 31N60W TO CENTRAL 
CUBA SAT. REMNANTS OF THE FRONT WILL RETURN NW THROUGH THE 
NORTHERN BAHAMAS ON SUN...THEN MOVE SE AGAIN ON MON AND TUE AS A 
NEW SURGE OF COLD AIR INVADES THE SE CONUS. WINDS AND SEAS WILL 
GRADUALLY DIMINISH LEAVING LIGHT TO MODERATE NORTHERLY FLOW N OF 
THE FRONT INTO MON. EXPECT INCREASING WINDS TO 20-25 KT ACROSS 
THE NW WATERS BY TUE WITH THE REINFORCING COLD FRONT.  

NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE

WARNINGS...

GULF OF MEXICO...
.NONE.

CARIBBEAN SEA AND TROPICAL N ATLC...
.NONE.

SW N ATLC...
.AMZ111...GALE WARNING N OF 29N W OF 78W THROUGH THIS EVENING. 

FOR ADDITIONAL INFORMATION PLEASE VISIT
WWW.HURRICANES.GOV/MARINE

$$
FORECASTER GR