000 AGXX40 KNHC 061916 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 230 PM EST THU NOV 06 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N GULF OF MEXICO... THE COMBINATION OF HIGH PRESSURE N OF THE AREA OVER THE SE U.S. ALONG WITH A BROAD AREA OF LOW PRESSURE TO THE SOUTH CONSISTING OF THREE SEPARATE LOW PRESSURE CENTERS...ONE IN THE SW GULF...THE SECOND IS T.D. IDA OVER THE NORTHERN FRINGE OF HONDURAS...AND THE THIRD SPINNING IN GULF OF TEHUANTEPEC...HAS TIGHTENED THE PRESSURE GRADIENT ACROSS THE GULF OF MEXICO TODAY. BUOY OBSERVATIONS ALONG WITH SCATTEROMETER WIND DATA INDICATES WINDS IN THE 20 TO 25 KT RANGE ACROSS MUCH OF THE AREA...WITH SOME 30 KT WINDS INDICATED IN THE EASTERN GULF. DUE TO THE DURATION AND LARGE ELY FETCH OF THESE WINDS...SEAS HAVE ALREADY BUILT UP TO 13 FT OVER THE CENTRAL PORTION OF THE MIDDLE GULF. SEAS ELSEWHERE ARE IN THE RANGE OF 8-12 FT WITH THE EXCEPTION OF THE NW AND N WATERS WHERE SEAS ARE LOWER...IN THE RANGE OF 4-6 FT. THE STRONG GRADIENT IS EXPECTED TO CONTINUE AS THE PARENT HIGH CENTER N OF THE AREA TODAY WILL SLIDE E INTO THE WESTERN ATLANTIC THROUGH MON WHILE TROPICAL DEPRESSION IDA...FORECAST TO RE-INTENSIFY INTO A TROPICAL STORM ACROSS THE WESTERN CARIBBEAN ON SATURDAY...ENTERS THE FAR S CENTRAL GULF NEAR THE YUCATAN PENINSULA MON. THIS WILL CONTINUE TO PRODUCE VERY ROUGH MARINE CONDITIONS FOR JUST ABOUT THE ENTIRE GULF. TIGHT PRES GRADIENT OVER THE FAR SW GULF WILL INDUCE GALE FORCE WINDS S OF 21N W OF 94W. EXPECT THESE WINDS TO LAST THROUGH AT LEAST SAT AFTERNOON. SW N ATLC S OF 31N AND W OF 65W A TIGHT PRESSURE GRADIENT ACROSS THE WESTERN PART WITH STRONG HIGH PRES MENTIONED ABOVE UNDER GULF OF MEXICO AND LOW PRESSURE OVER THE CANADIAN MARITIMES. QUIKSCAT AND ASCAT PASS HAVE INDICATED WINDS OF 20 KNOTS ACROSS THIS PART OF THE FORECAST AREA. THESE N TO NE WINDS WILL CONTINUE TO AFFECT MUCH OF THE WATERS N OF ABOUT 22N INTO SAT AFTERNOON. THE WINDS THEN VEER MORE TO THE E LATER SAT AND THROUGH MON AS THE HIGH SHIFTS FURTHER E. SEAS BUILD UP TO 13 FT E OF THE BAHAMAS BY MON PER LATEST WAVEWATCH GUIDANCE. HIGH SEAS WILL ALSO PROPAGATE W THROUGH BAHAMA PASSAGES SAT THROUGH MON...WITH SEAS BUILDING QUITE RAPIDLY OVER THE GULF STREAM WATERS. EXPECT NLY SWELLS UP TO 10 FT TO REACH AS FAR S AS WATERS NEAR THE SE BAHAMAS BY MON. CARIBBEAN AND TROPICAL N ATLANTIC W OF 55W... LATEST POSITION...AS OF 15Z...OF TROPICAL DEPRESSION IDA FROM NHC WAS JUST INLAND OF NICARAGUA NEAR 15.0N 84.0W WITH MAXIMUM WINDS OF 30 KT GUSTS TO 40 KT WITH A MOTION TO THE N AT 6 KT. IDA WILL EMERGE OFF THE NORTHERN HONDURAS COAST LATER THIS AFTERNOON OR EARLY THIS EVENING...THEN IS FORECAST TO INTENSIFY BACK TO A TROPICAL STORM NEAR 17N85W BY SAT MORNING AS IT TRACKS TOWARDS THE YUCATAN CHANNEL REACHING NEAR 19N86W BY SUN MORNING...AND ACROSS THE YUCATAN CHANNEL THROUGH LATE SUN. SEAS OVER THE NW CARIBBEAN HAVE DECREASED WITH IDA MAKING LANDFALL AND WEAKENING FROM A HURRICANE TO A T.D. BUT ARE EXPECTED TO BUILD ONCE AGAIN TONIGHT THROUGH EARLY MON AS THE SYSTEM RE-INTENSIFIES. LIGHT TO MODERATE TRADES WILL PREVAIL ACROSS THE REMAINDER OF THE AREA. SEAS OVER THE NORTHERN PORTION OF THE TROPICAL N ATLC ARE EXPECTED TO BUILD UP TO 7-10 FT IN LONG PERIOD NLY SWELLS BEGINNING SUN THROUGH MON. NE SWELLS WILL BUILD SEAS UP TO 8 FT THROUGH ATLC PASSAGES BEGINNING MON NIGHT. WARNINGS... ATLC... .NONE. CARIBBEAN... .AMZ084...TROPICAL STORM WARNING FROM 16.5N TO 18N BETWEEN 83.5W 85.5W. GULF OF MEXICO... .GMZ082...GALE WARNING S OF 21N W OF 94W. $$ FORECASTER AL