000 AGXX40 KNHC 051947 CCA MIMATS MARINE WEATHER DISCUSSION...CORRECTED NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 245 PM EST THU NOV 05 2009 CORRECTED TO ADD GALE WARNING FOR GULF OF MEXICO MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... RECENT ASCAT PASS AND BUOY OBSERVATIONS INDICATE SURFACE WINDS OF 20 TO 25 KNOTS ACROSS MUCH OF THE GULF WATERS AS THE 1031 MB HIGH PRES WAS CENTERED FURTHER SOUTH...NEAR TENNESSEE...AND TIGHTENED THE PRESSURE GRADIENT ACROSS THE GULF WATERS. THIS FEATURE WILL SHIFT TO THE E OVER THE SE U.S. STATES BY FRIDAY...AND EVENTUALLY OFF THE EAST COAST OF THE U.S. ON SATURDAY. A TIGHT PRES GRADIENT BETWEEN THE HIGH AND LOW PRES TO THE SE-S WILL REMAIN IN PLACE OVER THE GULF THROUGH FRI. LATEST GFS AND NAM MODEL RUNS DEVELOP A WEAK AREA OF LOW PRES IN THE BAY OF CAMPECHE FRI WITH NE-N WINDS ON THE W SIDE OF THE LOW INCREASING TO GALE FORCE BY 12 UTC FRI AND CONTINUING THROUGH SATURDAY MORNING. WINDS WILL GRADUALLY DIMINISH ACROSS THE WESTERN PART OF THE GULF SUNDAY AS THE LOW SHIFTS TO THE N-NW AND THE HIGH SHIFTS EASTWARD TO A POSITION NEAR BERMUDA WEAKENING THE PRES GRADIENT. MEANWHILE...15 UTC NHC TRACK BRINGS T.S. IDA TO 23.5N 87.0W IN THE EASTERN GULF ON 12 UTC TUE. SW N ATLC S OF 31N AND W OF 55W... A WEAK AND DIFFUSE COLD FRONT IS IN PLACE OVER THE NE PORTION OF THE AREA FROM 31N67W TO 26N74W. THIS FRONT WILL DISSIPATE TONIGHT. IN THE UPPER LEVELS A SHORTWAVE TROUGH IS EXITING THE EASTERN SEABOARD THIS AFTERNOON...AND HAS PUSHED A STRONG COLD FRONT OFF THE EAST COAST OF THE U.S. TODAY. A STRONG NORTHERLY WIND SURGE SETS UP BEHIND THE FRONT TONIGHT THROUGH SUN AS THE COMBINATION OF HIGH PRES BUILDING OVER THE SE U.S. STATES AND A LOW DEEPENING OFF THE MID ATLANTIC COAST RESULTS IN A TIGHT PRESSURE GRADIENT. NORTHERLY SWELL GENERATED BY THESE WINDS WILL PROPAGATE THROUGH THE AREA BUILDING SEAS UP TO 14 FT OVER THE N PORTION FRI NIGHT THROUGH SUN. THE LONG PERIOD SWELLS WILL CONTINUE SOUTHWARD ACROSS THE WESTERN PORTION THROUGH THE FIRST HALF OF NEXT WEEK. CARIBBEAN AND TROPICAL N ATLANTIC W OF 55W... T.S. IDA WAS LOCATED NEAR 13.1N 83.7W THIS AFTERNOON WITH ESTIMATED WINDS OF 55 KT. IDA HAS MADE LANDFALL ALONG THE E COAST OF NICARAGUA. SHORT PERIOD WAVES OF 8 TO 12 FT (WITH MAX SEAS OF 19 FT) WILL AFFECT THE CARIBBEAN WATERS S OF 18N W OF 81W. IDA IS MOVING TOWARD THE NORTHWEST AT 3 KT. THIS FEATURE IS FORECAST TO EXIT THE COAST OF HONDURAS ON SATURDAY AS A TROPICAL DEPRESSION...AND THEN REINTENSIFY INTO A TROPICAL STORM ON SUNDAY OVER THE WESTERN CARIBBEAN WATERS. OTHERWISE...SUBTROPICAL HIGH PRES REMAINS CENTERED WELL N OF THE AREA WITH A WEAK PRESSURE GRADIENT CONTINUING TO PREVAIL ACROSS THE CARIBBEAN RESULTING IN PERSISTENT RARE LIGHT TO MODERATE TRADES. THE HIGH WILL REMAIN CENTERED WELL N OF THE AREA THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK ALLOWING FOR THE WEAK GRADIENT TO CONTINUE. NORTHERLY SWELL OF UP TO 8 FT WILL START TO PROPAGATE THROUGH THE WINDWARD PASSAGES BY MON NIGHT. WARNINGS... ATLC... .NONE. CARIBBEAN... .AMZ084...TROPICAL STORM WARNING N OF 12N W OF 82W. GULF OF MEXICO... .GMZ082...GALE WARNING S OF 21N W OF 94W. $$ FORECASTER AL