000 AGXX40 KNHC 101847 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 230 PM EDT WED APR 10 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... W ATLANTIC HIGH PRESSURE RIDGE REMAINS ANCHORED ON 1025 MB HIGH EAST OF BERMUDA EXTENDING W INTO SE U.S. AHEAD OF DEEP LAYERED LOW MOVING INTO UPPER MS VALLEY. LATEST OBSERVATIONS FROM SHIPS...BUOYS...AND 1630 UTC ASCAT SCATTEROMETER PASS DEPICT FRESH TO STRONG RETURN FLOW OVER W AND NW GULF WITH MODERATE WINDS OVER NE GULF AND ELY FLOW AROUND 20 KT EXITING THE STRAITS. SEAS RANGING 7 TO 9 FT ACROSS NW QUARTER OF BASIN. AROUND 1200 UTC...PEAK WINDS WERE NEAR GALE FORCE FROM OBSERVATIONS AT PLATFORMS 42361...43047...AND 42362. WINDS SHOULD CONTINUE TO SUBSIDE SLIGHTLY AHEAD OF COLD FRONT EXPECTED TO REACH TEXAS GULF COAST AROUND 00Z THIS EVENING. AS THE FRONT MOVES ACROSS NW GULF...THIS WILL ALLOW NLY FLOW TO SPILL DOWN TEXAS AND MEXICAN COASTAL WATERS...AND REACH NEAR 30 KT THURSDAY MORNING THROUGH AFTERNOON. WITHOUT A STRONG SURFACE HIGH FORCING MUCH COLD AIR ADVECTION...THESE NEAR GALE WINDS WILL BE SHORT- LIVED. THIS EVENT SHOULD BUILD SEAS TO NEAR 10 FT BEHIND FRONT IN COMBINED SE SWELL AND N WIND WAVES. FRONT TO REACH MOUTH OF MS TO TAMPICO BY 00Z FRIDAY AND FLORIDA BIG BEND TO NEAR TUXPAN BY 00Z SATURDAY AS W END OF BOUNDARY BEGINS TO WASH OUT AND LIFT N. FRONT MAY NOT MAKE IT MUCH FARTHER S THAN TAMPA BAY AREA SATURDAY NIGHT...AS IT STALLS...BEGINS TO WEAKEN SUNDAY...AND LIFT N INTO N GULF SUNDAY NIGHT. SW N ATLC S OF 31N W OF 55W... HIGH PRESSURE JUST E OF BERMUDA AND ASSOCIATED E TO W RIDGE WILL CONTINUE TO DOMINATE THE REGION THROUGH THE REST OF THE WEEK. WINDS REMAIN 20 KT OR LESS AND SEAS ARE LESS THAN 8 FT. LITTLE CHANGE NEXT 24 HOURS BEFORE HIGH BEGINS TO BE NUDGED EWD THURSDAY THROUGH FRIDAY AS FRONTAL SYSTEM MOVES E ACROSS GULF OF MEXICO. WINDS TO VEER ACROSS SW AND W PORTIONS DURING THIS TIME AND INCREASE SLIGHTLY...BECOMING SW 20-25 KT JUEST E OF FLORIDA N OF 29N AS COLD FRONT MOVES E THROUGH FLORIDA PANHANDLE. FRONT EXPECTED TO MOVE OFF NE FLORIDA COAST FRIDAY EVENING AND WEAKEN QUICKLY...STALLING ACROSS CENTRAL FLORIDA BY LATE SAT. MODERATE ELY TRADES TO PREVAIL ACROSS TROPICAL N ATLC...WITH FRESH TRADES S OF 14N...WITH SEAS GENERALLY 6-7 FT IN ENE TRADE WIND SWELL. WINDS AND SEAS TO INCREASE VERY SLIGHTLY OVER THE WEEKEND AS BERMUDA HIGH SHIFTS SLIGHTLY E AND MOVES DUE N OF THE AREA TO TIGHTEN GRADIENT. CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W... HIGH PRESSURE CENTERED JUST E OF BERMUDA HAS HELPED TIGHTEN THE PRESSURE GRADIENT OVER THE CENTRAL CARIBBEAN PAST 24 HRS. THE 1452 UTC ASCAT SCATTEROMETER PASS INDICATES FRESH TO STRONG WINDS EXPANDING N ACROSS CENTRAL PORTIONS TO ABOUT 16N...WITH OROGRAPHICALLY FORCED WINDS ACCELERATING TO 25 KT AROUND THE BARAHONA PENINSULA. THE SAME SCATTEROMETER PASS ALSO SHOWED ESE WINDS OF 25 KT THROUGH GULF OF HONDURAS. LITTLE CHANGE EXPECTED NEXT TWO DAYS OVER THE CARIBBEAN BEFORE WINDS BEGIN TO VEER S TO SE NW PORTIONS INCLUDING GULF OF HONDURAS AS GULF OF MEXICO FRONT MOVES E OF 90W FRIDAY. SLIGHTLY E MOVEMENT OF BERMUDA HIGH TO WEAKEN PRESSURE GRADIENT ACROSS THE BASIN BY EARLY SATURDAY TO BRING ABOUT MODEST DECREASING TREND IN WINDS AND SEAS ACROSS E AND CENTRAL CARIB...WHILE CONDITIONS DIMINISH CONSIDERABLY NW PORTIONS. 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 STRIPLING/LANDSEA