000
AGXX40 KNHC 200606
MIMATS

MARINE WEATHER DISCUSSION   
NWS NATIONAL HURRICANE CENTER MIAMI FL
105 AM EST TUE DEC 20 2011

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...
SE RETURN FLOW IS CURRENTLY AT 15-20 KT ACROSS MOST OF THE GULF 
OF MEXICO WITH A BAND OF 20-25 KT EXTENDING SE FROM THE 
N-CENTRAL PORTION TO THE FL STRAITS. A COLD FRONT IS ON TRACK 
TO ENTER THE NW WATERS AROUND SUNRISE TODAY...REACH FROM 
S-CENTRAL LA TO THE NW BAY OF CAMPECHE AT SUNSET TODAY...AND 
STALL FROM THE MS DELTA TO THE NW BAY OF CAMPECHE EARLY WED. AS 
ATLC RIDGE BUILDS W AGAIN WED AFTERNOON AND WED NIGHT THE 
FRONTAL REMNANTS WILL DRIFT NW REACHING NEAR THE TX COAST JUST 
BEFORE SUNRISE THU IN TIME FOR A SECOND NLY SURGE TO PUSH THE 
FRONT E AGAIN REACHING FROM THE W FL PANHANDLE TO THE NW BAY OF 
CAMPECHE AROUND SUNSET THU...THEN DRIFTING E THROUGH LATE FRI 
NIGHT AS STRONG NLY WINDS REACHING MINIMAL GALE FUNNEL S OVER 
THE W GULF WATERS.

SOUTHWEST N ATLC S OF 31N W OF 65W...
A COLD FRONT EXTENDING FROM 24N55W TO EXTREME N HISPANIOLA IS 
WEAKENING TO A SHEAR AXIS OVER E CUBA ATTM. EXPECT THE FRONT TO 
FURTHER WEAKEN TO A SHEAR AXIS REACHING FROM 22N55W TO E 
HISPANIOLA LATER TODAY AND SLOWLY DISSIPATE FROM 18N-20N BETWEEN 
55W AND 76W ON TONIGHT INTO EARLY WED. SLY RETURN FLOW IS 
SETTING UP ALONG THE NE FL COAST AND WILL SPREAD E ACROSS THE 
NORTHERN WATERS TONIGHT INTO WED. THE SLY WINDS WILL INCREASE 
OFF THE NE FL COAST THIS AFTERNOON THROUGH WED NIGHT THEN 
DIMINISH AS 
ANOTHER WEAK COLD FRONT APPROACHES BUT STALLS W OVER AREA AND 
DOES NOT FINALLY ENTER THE ATLC WATERS TIL SAT NIGHT. IN THE 
MEANTIME...A RIDGE WILL EXTEND FROM JUST S OF BERMUDA TO THE 
CENTRAL FL COAST WED-SAT WITH NE-E WINDS AT 20-25 KT ALONG THE 
SOUTHERN PERIPHERY OF RIDGE...S OF 26N TODAY AND WED...THEN S OF 
24N THU-SAT. 

CARIBBEAN SEA AND TROPICAL N ATLC...
STRENGTHENING HIGH PRES N OF THE AREA WILL MAINTAIN NE-E FLOW 
ACROSS MOST OF THE CARIBBEAN AND TROPICAL ATLC WATERS THROUGH 
THE PERIOD WITH THE EXCEPTION OF THE NW CARIBBEAN WHERE SE 
RETURN FLOW WILL PERSIST THROUGH THU. NE-E WINDS WILL INCREASE 
TO 25-30 KT OVER THE CENTRAL CARIBBEAN WATERS TONIGHT AND 
CONTINUE THROUGH SAT. A COLD FRONT IS WEAKENING TO A SHEAR AXIS 
OVER THE ATLC WATERS N OF THE VIRGIN ISLANDS AND CONTINUE 
THROUGH WED WITH PRECIP ACCUMULATIONS POSSIBLY A PROBLEM OVER E 
HISPANIOLA TODAY. THE NEXT COLD FRONT ENTERS THE NW CARIBBEAN 
SUN NIGHT.

WARNINGS...

GULF OF MEXICO...
.NONE. GALE CONDITIONS EXPECTED S OF 25N W OF 96W FRI 
NIGHT-SAT.  

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

.SW N ATLC...
.NONE.
    
FOR ADDITIONAL INFORMATION PLEASE VISIT
HTTP://WWW.HURRICANES.GOV/MARINE

$$
FORECASTER NELSON