000 AGXX40 KNHC 101913 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 215 PM EST TUE NOV 10 2009 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N GULF OF MEXICO... IDA HAS BECOME EXTRATROPICAL AND HAS MOVED ONSHORE OVER LOWER ALABAMA. BUOYS INDICATED 25 WINDS OUT OF THE NW OVER ADJACENT GULF WATERS NEAR THE MISSISSIPPI DELTA. THESE WINDS MAY INCREASE TO GALE FORCE THIS AFTERNOON AS COOLER AIR ADVECTS SOUTHWARD OFF THE LAND IN THE WAKE OF IDA...RESULTING IN A DEVELOPING COLD FRONT. THE FRONT WILL PUSH ACROSS THE EASTERN HALF OF THE GULF BY WED NIGHT...FOLLOWED BY GENERALLY 20 TO 25 KT NORTHERLY FLOW. THE COOLER AIR WILL FUNNEL ALONG THE TERRAIN ALONG THE MEXICAN COAST IN THE FAR SW GULF...RESULTING IN WINDS REACHING NEAR GALE FORCE TODAY THROUGH WED. PERSISTENT STRONG NORTHERLY WINDS ALONG WITH AMPLE FETCH WILL GENERATE LONG PERIOD N SWELL ACROSS THE GULF THROUGH THU. HIGH PRES WILL BUILD FROM WEST TO EAST ACROSS THE NORTHERN GULF COAST FRI THROUGH SUN...ALLOWING WINDS AND SEAS TO DIMINISH. CARIBBEAN SEA... SCATTEROMETER DATA SHOW FRESH NE WINDS PUSHING THROUGH THE WINDWARD AND MONA PASSAGES TODAY...AND TO THE SOUTH OF HISPANIOLA AND JAMAICA. GENERALLY LIGHT TO MODERATE WINDS PERSIST ACROSS THE REMAINDER OF THE CARIBBEAN...DUE TO WEAK HIGH PRES N OF THE AREA. A COLD FRONT WILL MOVE INTO THE FAR NW CARIBBEAN TONIGHT...DELIVERING FRESH NORTHERLY FLOW DOWN THE EAST COAST OF THE YUCATAN PENINSULA TOWARD BELIZE AND THE HONDURAN COAST. ALTHOUGH THE BOUNDARY WILL WEAKEN AS IT MOVES SOUTH...NORTHERLY WINDS TO 20 KT WILL MAKE IT DOWN THE NICARAGUAN COAST TO COSTA RICA BY LATE THU. LONG PERIOD NORTHERLY SWELL WILL FOLLOW THE FRONT WED AND THU...PROPAGATING THROUGH THE YUCATAN CHANNEL TOWARD EASTERN HONDURAS. SIMILARLY OVER THE EASTERN CARIBBEAN...EXPECT LONG PERIOD SWELL UP TO 7 FT TO PUSH THROUGH THE MONA AND ANEGADA PASSAGES AND TO THE EAST OF THE LESSER ANTILLES INTO THU. SW N ATLC S OF 31N... A STRONG UPPER LOW N OF PUERTO RICO HAS GENERATED A SURFACE REFLECTION LOW NEAR 24N62W WITH AN ESTIMATED PRESSURE AROUND 1011 MB. A TIGHT PRESSURE GRADIENT BETWEEN THE SURFACE LOW AND RIDGING TO THE NORTH IS RESULTING GALE FORCE WINDS TO THE NORTH OF THE LOW. BUOY 41049 PROVIDES THIS EVIDENCE...REPORTING WINDS OUT OF THE NE WITH PEAK WINDS TO 35 KT AND SEAS TO 16 FT. BUOYS AND SCATTEROMETER DATA SHOW 20 TO 25 KT NE WINDS BETWEEN PUERTO RICO AND BERMUDA...WITH 20 TO 25 KT SE FLOW THROUGH THE BAHAMAS...AROUND THE BASE OF A SURFACE RIDGE. THIS LOW WILL MOVE NW TO NEAR 29N69W WHERE IT WILL DISSIPATE. MEANWHILE THE REMNANTS OF IDA WILL PUSH OFF THE GEORGIA COAST WITH A COLD FRONT TRAILING BEHIND. WINDS WILL INCREASE BOTH AHEAD OF AND BEHIND THE FRONT OVER THE WATERS N OF THE BAHAMAS THU AND FRI. WINDS DIMINISH THROUGH THE WEEKEND AFTER THE LOW LIFTS OUT SAT...LEAVING THE WEAKENING FRONT TRAILING FROM NEAR BERMUDA TO HISPANIOLA. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .GMZ084...GALE WARNING N OF 29N LATE TODAY. $$ FORECASTER CHRISTENSEN