000
AGXX40 KNHC 190814
MIMATS

MARINE WEATHER DISCUSSION  
NWS NATIONAL HURRICANE CENTER MIAMI FL
255 AM EST SAT JAN 19 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...
WINDS HAVE DIMINISHED ACROSS THE GULF WATERS FROM W TO E WITH 
WINDS OF 20-25 KT LIMITED TO THE NE GULF N OF 26N E OF 86W AS 
OF 0600 UTC. THESE CONDITIONS WERE CONFIRMED BY THE MOST RECENT 
SCATTEROMETER PASS AND BUOY OBSERVATIONS. A 1032 MB HIGH PRES 
LOCATED OVER CENTRAL ALABAMA EXTENDS A RIDGE OVER THE ENTIRE 
GULF. WINDS AND SEAS WILL CONTINUE TO DIMINISH ACROSS THE GULF 
REGION THROUGH THE WEEKEND AS THE HIGH PRES WEAKENS N OF THE 
AREA. BY MON...THICKNESSES FALL ACROSS THE NORTHERN GULF AS AN 
AMPLIFYING DEEP-LAYER LONG-WAVE TROUGH SENDS A SHOT OF COLD AIR 
INTO THE AREA. HIGH PRES WILL BUILD AGAIN NORTH OF THE AREA LATE 
MON INTO TUE. THIS REINFORCING SURGE OF COLD AIR WILL INCREASE 
THE NORTHERLY WINDS SOME ACROSS THE GULF LATE MON THROUGH WED.

CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W...
WINDS AND SEAS IN THE CENTRAL CARIBBEAN HAVE DIMINISHED AS THE 
HIGH PRES N OF AREA MOVES E ALLOWING A FRONTAL BOUNDARY TO SWEEP 
ACROSS THE SW ATLC. LATEST SCATTEROMETER DATA PROVIDED 
OBSERVATIONS OF 20-25 KT NE WINDS NEAR THE COAST OF COLOMBIA AND 
SHOWED FRESH TO N-NE FLOW BEHIND THE STATIONARY FRONT OVER THE 
NW CARIBBEAN EXTENDING FROM MATANZAS CUBA TO THE GULF OF 
HONDURAS NEAR 17N86W. THE FRONT WILL BECOME DIFFUSE TODAY. FRESH 
TO STRONG TRADES WILL RETURN TO THE SOUTH-CENTRAL CARIBBEAN 
TODAY 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 8 FT. A SOLID AREA OF 20 
KT WINDS WITH SEAS TO 9 FT IN EASTERLY SWELL SHOULD BE IN PLACE 
BY TUE.

SW N ATLC S OF 31N W OF 55W...
A COLD FRONT ENTERS THE FORECAST AREA NEAR 29N65W AND EXTENDS TO 
28N70W WHERE IT BECOMES STATIONARY TO WEST-CENTRAL CUBA. 
BOTH...AN ASCAT PASS AND AN OSCAT PASS SHOWED N-NE WINDS OF 
20-25 KT IN THE WAKE OF THE FRONT. THESE WINDS ARE FORECAST TO 
DIMINISH TO 15-20 KT LATER TODAY AS THE FRONT MOVES N AND BEGINS 
TO WEAKEN.  BY MON...THE AMPLIFYING LONG-WAVE DEEP-LAYER TROUGH 
TO THE N WILL SEND A COLD FRONT INTO NW WATERS THAT WILL 
REINFORCE THE OLD BOUNDARY. THE FRONT WILL MOVE AGAIN SE ACROSS 
THE SW N ATLC MON AND TUE REACHING A POSITION FROM 31N72W TO 
THE STRAITS OF FLORIDA MON EVENING...FROM 31N69W TO CENTRAL CUBA 
TUE MORNING AND FROM 30N65W TO EASTERN CUBA TUE EVENING. EXPECT 
INCREASING WINDS TO 20-25 KT OVER THE NW WATERS MON NIGHT INTO 
TUE IN THE WAKE OF THE FRONT. MODERATE TO FRESH NLY WINDS WILL 
BLOW BEHIND THE COLD FRONT WED WITH BUILDING SEAS TO 7-9 FT IN 
NW SWELL.  

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...
.NONE. 

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

$$
FORECASTER GR