000 AGXX40 KNHC 071735 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 145 PM EDT WED APR 7 2010 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W GULF OF MEXICO... AN E TO W RIDGE ACROSS THE SE CONUS ALONG 31N WILL MAINTAIN THE E-SE RETURN FLOW ACROSS ALL WATERS INTO EARLY THIS AFTERNOON... THEN THE RIDGE WILL RETRACT EASTWARD. E-SE AT 15-20 KT OVER ALL WATERS...EXCEPT NE PART...ATTM WILL DIMINISH LATE THIS AFTERNOON JUST AHEAD OF A COLD FRONT MOVING OFF THE TX COAST AROUND SUNSET. EXPECT THE STRENGTH OF THE POST FRONTAL NLY WINDS TO MAX AT 30 KT AS EVEN THE GFS HAS BACKED OFF ON PREVIOUS HINT OF 35 KT OVER JUST A SMALL AREA OF SW GULF AND ONLY ON THU. THE FRONT WILL EXTEND FROM W FL PANHANDLE TO CENTRAL BAY OF CAMPECHE MIDDAY THU. ALSO EXPECT POST FRONTAL SEAS HEIGHTS TO MAX AT 11 FT MAINLY NEAR 22N96W...AND NOTE THIS IS HIGHER THAN NWW3 GUIDANCE. THE FRONT IS FORECAST TO MOVE THROUGH THE FL STRAITS EARLY FRI NIGHT. POST FRONTAL HIGH PRES CENTER IS NOW EXPECTED TO REMAIN N OF THE AREA AND SHIFT NE WITH SOME GUIDANCE CHANGING THIS NE TRACK FURTHER AWAY FROM THE GULF COAST FROM MODEL RUN TO MODEL RUN. E AND SE RETURN FLOW ALL WATERS SUN AND MON. SW N ATLC W OF 55W... HIGH PRES CENTERED AT 29N69W HAS A RIDGE E AND W ALONG 29-30N AS EXPECTED. AS THE HIGH CENTER SHIFTS E PASSING TO THE S OF BERMUDA THU THE SLY RETURN FLOW WILL INCREASE OVER THE NW PORTION FORECAST AREA WITH THE NEXT COLD FRONT MOVING OFF SE CONUS LATE THU NIGHT...REACHING FROM 31N71W TO CAY SAL BANK FRI NIGHT...FROM BERMUDA TO E CUBA SAT NIGHT...THEN THE FRONT BECOMES VERY WEAK SEGMENT W OF 65W LATE SAT NIGHT BUT CONTINUING E OVER THE AREA BETWEEN 65W AND 55W. THE ASSOCIATED SW TO NW WIND SHIFT ALONG FRONT NOT EXPECTED TO BE AS STRONG AS PREVIOUSLY FORECAST AND AT ONLY 15-20 KT. CARIBBEAN SEA AND TROPICAL N ATLC... A COUPLE OF FRONTAL TROUGHS PERSIST OVER THE TROPICAL ATLC WATERS WITH THE INITIAL TROUGH NOW S OF BARBADOS EXTENDING W ACROSS ST VINCENT. OTHER THAN CLOUD LINE AND ISOLATED SHOWERS THE BOUNDARY IS OF LITTLE SIGNIFICANCE AND NOT MENTIONED AT ALL IN OFFSHORE SYNOPSIS. NE TO E TRADES WILL PREVAIL THROUGH REMAINDER OF THE FORECAST PERIOD TILL NEXT CDFNT ARRIVES YUCATAN CHANNEL EARLY FRI NIGHT...THEN DRIFTS SE AND WASHES OUT OVER THE NW CARIBBEAN ZONE SAT INTO SUN. LOCALLY ENHANCED WINDS AND SEAS CONTINUE ALONG NW COLOMBIA AT 20 TO 25 KT. NE WINDS TO 20 KT ARE ALSO NOTED ACROSS THE WINDWARD PASSAGE. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER NELSON