000
AGXX40 KNHC 120754
MIMATS

MARINE WEATHER DISCUSSION
NWS NATIONAL HURRICANE CENTER MIAMI FL
400 AM EDT FRI APR 12 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 NEAR FORT WALTON 
FLORIDA TO VERACRUZ MEXICO. A VIGOROUS SQUALL LINE AHEAD OF THE 
FRONT IS MOVING THROUGH THE FAR NE GULF N OF 26N. THE FRONT WILL 
SLOW AS IT SAGS SE TODAY...REACHING FROM NEAR SARASOTA FLORIDA 
TO VERACRUZ BY THIS EVENING...THEN STALLING FROM FORT MYERS 
FLORIDA TO NW YUCATAN BY LATE SAT...AND BECOMING DIFFUSE SUN. 
MODEL CONSENSUS SHOWS GENERALLY LIGHT TO MODERATE EASTERLY FLOW 
INTO EARLY NEXT WEEK. AREAS OF SEA FOG WITH VISIBILITIES BELOW 3 
NM ARE POSSIBLE OVER THE EASTERN GULF INTO SAT. SMOKE FROM FIRES 
OVER WESTERN YUCATAN WILL LOWER VISIBILITIES ACROSS THE ADJACENT 
BAY OF CAMPECHE AS WELL.

SW N ATLC S OF 31N W OF 55W...1023 MB HIGH PRES CENTERED NEAR 
30N53W WILL SHIFT E TODAY AHEAD OF A COLD FRONT THAT WILL EMERGE 
OFF THE NE FLORIDA COAST THIS EVENING. SOUTHERLY WINDS WILL 
INCREASE AHEAD OF THE FRONT OFF NE FLORIDA TODAY...REACHING AS 
HIGH AS 20 KT...BEFORE SHIFTING NW TO N BEHIND THE FRONT. THE 
FRONT WILL REACH FROM 31N75W TO NEAR WEST PALM BEACH FLORIDA BY 
LATE SAT. BY LATE SUN...THE FRONT WILL CONTINUE EASTWARD N OF 
29N...REACHING FROM 31N65W TO 30N74W...THEN AS A DISSIPATING 
STATIONARY FRONT TO E CENTRAL FLORIDA. HIGH PRES WILL BUILD 
BEHIND THE FRONT SUN THROUGH EARLY NEXT WEEK...MAINTAINING 
GENERALLY LIGHT TO MODERATE FLOW EXCEPT FOR WINDS TO 20 KT OFF 
COAST OF HISPANIOLA.

CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W...        
HIGH PRES N OF THE AREA IS MAINTAINING FRESH TRADES OVER THE 
CENTRAL CARIBBEAN...WITH WINDS TO 25 KT OFF THE COAST OF 
COLOMBIA. SHIP OBSERVATIONS AND SCATTEROMETER DATA ALSO IS 
SHOWING FRESH TO STRONG SE WINDS OVER THE GULF OF 
HONDURAS...BETWEEN THE HIGH PRES IN THE ATLC AND HIGHER TERRAIN 
OVER NORTHERN CENTRAL AMERICA. LITTLE CHANGE IS EXPECTED IN THE 
OVERALL PATTERN THROUGH EARLY NEXT WEEK. THE STRONGER WINDS IN 
THE GULF OF HONDURAS WILL BE MORE PREVALENT IN THE OVERNIGHT 
HOURS DUE TO DRAINAGE EFFECTS.

WARNINGS...
GULF OF MEXICO...
.NONE.
CARIBBEAN SEA AND TROPICAL N ATLC...
.NONE.
SW N ATLC...
.NONE.

EFFECTIVE 9 APRIL 2013...TAFB GRIDDED MARINE FORECASTS FOR 10-M 
WINDS...10-M WIND GUSTS...SIGNIFICANT WAVE HEIGHTS AND HAZARDS 
FOR THE OFFSHORE AND HIGH SEAS DOMAIN ARE AVAILABLE IN THE 
NATIONAL DIGITAL FORECAST DATABASE(NDFD)ON AN EXPERIMENTAL BASIS 

AT: HTTP://PREVIEW.WEATHER.GOV/GRAPHICAL

ADDITIONAL INFORMATION IS AVAILABLE AT 
WWW.NWS.NOAA.GOV/OM/NOTIFICATION/PNS13OFFSHORE_HIGHSEAS.HTM

NOTE...GRIDDED MARINE FORECASTS AT 
WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE ARE NO LONGER AVAILABLE. 

$$
FORECASTER CHRISTENSEN