000 AGXX40 KNHC 250608 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 210 AM EDT SUN MAR 25 2012 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC AND SOUTHWEST N ATLC S OF 31N W OF 55W. GULF OF MEXICO... THE FRONT HAS TEMPORALLY SLOWED FROM THE FL BIG BEND TO THE CENTRAL GULF WATERS. THE EXPECTED SECONDARY NLY SURGE IS CURRENTLY ROTATING SE THROUGH CENTRAL GA...MS AND AL AND WILL MERGE WITH THE INITIAL BOUNDARY LATER THIS MORNING...EFFECTIVELY PUSHING IT SE TO A PSN FROM TAMPA BAY TO NEAR 24N87W LATE TONIGHT...WHERE IT WILL ALSO MERGE WITH THE NORTHERN EXTENSION OF A LOW LEVEL TROUGH THAT IS QUASI-STATIONARY OVER THE YUCATAN PENINSULA. THE FRONT WILL THEN WEAKEN AS IT CONTINUES SE OF THE AREA LATE MON. POST FRONTAL HIGH PRES WILL BE IN THE FORM A NE-SW RIDGE THAT WILL MOVE E OVER THE NW WATERS MON EVENING THEN CHANGE LITTLE THROUGH EARLY WED. THIS WILL SET UP SE 10-15 KT RETURN FLOW OVER THE NW WATERS MON NIGHT WITH THESE CONDITIONS SPREADING E ACROSS THE ENTIRE GULF BY LATE TUE NIGHT. THE EXCEPTION IS THE ELY WINDS WILL BACK TO NE ALONG THE W COAST YUCATAN PENINSULA AND INCREASE TO 15-20 KT EACH EVENING. THE GRADIENT TIGHTENS LATE WED WITH E WINDS INCREASING TO 15-20 KT OVER THE E GULF...BUT DIMINISHING EARLY THU AS A WEAK FRONT MOVES OVER THE NE COASTAL PLAINS. SOUTHWEST N ATLC AND TROPICAL ATLC S OF 31N W OF 55W... SURFACE HIGH PRESSURE NEAR 28N66W WITH A RIDGE SW TO THE FL STRAITS STILL SUPPORTS A NARROWING SWATH OF E WINDS AT 15-20 KT ACROSS THE TROPICAL ATLC WATERS N OF THE LEEWARDS. THE HIGH AND ASSOCIATED RIDGE WILL SHIFT E TODAY ALLOWING A REINFORCED COLD FRONT TO MOVE OFF THE GA COAST REACHING FROM 31N74W TO THE FL STRAITS TONIGHT. BY THEN ANOTHER NLY SURGE WILL APPROACH THE NW WATERS AND SHOULD MERGE WITH THE NORTHERN EXTENSION OF INITIAL FRONT LATE MON NEAR 31N67W...WITH THE INITIAL FRONT EXTENDING SW TO E CUBA. THE SOUTHERN SEGMENT OF THE FRONT WILL WASH OUT TUE ACROSS HISPANIOLA WITH ONLY A SLIGHT WIND SHIFT OCCURRING OVER THE TROPICAL ATLC WATERS N OF THE LEEWARDS MON NIGHT INTO TUE. BY LATE TUE THE MAIN FOCUS WILL THEN BE ALONG THE SECONDARY FRONTAL BOUNDARY...WITH ONLY A SLIGHT WIND SHIFT...EXTENDING FROM 31N55W TO 25N65W TO THE NORTHERN BAHAMAS...AS THE NLY WINDS N OF THIS SECONDARY FRONT WILL BE 20-25 KT RANGE WHILE MOSTLY IN THE 10 KT RANGE S OF THE BOUNDARY. THE FRONT SHOULD MOVE E OF 55W LATE WED AS A SURFACE HIGH SHIFTS E TO NEAR 32N71W WITH A RIDGE W TO 31N80W. THE RIDGE WILL SHIFT S AND EXTEND E-W FROM 30N60W TO 28N80W EARLY THU...THEN FURTHER S ALONG 26N LATE THU ALLOWING THE NEXT FRONT TO MOVE INTO THE NORTHERN WATERS THU NIGHT. CARIBBEAN SEA... A WEAK COLD WILL SLIP INTO THE EXTREME NW CARIBBEAN THIS AFTERNOON WITH WINDS BECOMING LIGHT AND VARIABLE NEAR THE FRONTAL BOUNDARY AND CONTINUING THROUGH MON NIGHT...THEN THE FRONTAL REMNANTS WILL GRADUALLY DISSIPATE OVER HISPANIOLA ON TUE ALLOWING NE TRADES TO RESUME OVER THE NW AND N-CENTRAL WATERS. OTHERWISE...ATLC HIGH PRES WILL MAINTAIN THE NE-E 10-15 KT TRADES ACROSS AREA THROUGH TODAY...AND ENHANCED TO ONLY 15-20 KT ALONG NW COAST OF COLOMBIA. THE TRADES DIMINISH LATE TONIGHT AND CONTINUE BELOW NORMAL THROUGH TUE...THEN THE GRADIENT WILL INCREASE OVER THE CENTRAL WATERS WITH NE-E WINDS RESUMING AT 15-20 KT...EXCEPT 20-25 KT NEAR NW COLOMBIA...WITH LITTLE CHANGE THROUGH THU. WARNINGS... GULF OF MEXICO... .NONE. .CARIBBEAN SEA AND TROPICAL N ATLC... .NONE. .SW N ATLC... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER NELSON