000 AGXX40 KNHC 301852 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 250 PM EDT FRI JUL 30 2010 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... TWO WEAK FRONTAL FRONTAL TYPE TROUGHS PERSIST ACROSS THE E AND SE GULF THIS AFTERNOON. THE FIRST FROM NEAR NAPLES W-SW AS A FINE LINE AND TO NEAR BUOY 42055 IN THE SW GULF. THE SECOND FROM JUST N OF THE TAMPA BAY AREA SW INTO THE CENTRAL GULF. GRADUAL WEAKENING AND MERGER OF THESE FEATURES IS LIKELY OVER THE NEXT 48 HOURS AS E COAST UPPER TROUGH EASES EWD AND N TO NE FLOW ALOFT CONTINUES ACROSS THE NE GULF. CONVECTIVE CELLS WILL CONTINUE TO FIRE ALONG THESE TROUGHS. NWLY FLOW NOT DEPICTED WELL BY GFS YDA CONTINUES AT 10-15 KT FROM OFF THE MOUTH OF THE MS TO NEAR THE SECOND MORE NLY TROUGH...WHILE ELSEWHERE FLOW IS LIGHT TO MODERATE AND SEAS 3 FT OR LESS. A 1013 MB HIGH OVER THE NW GULF WILL SINK SLIGHTLY NEXT FEW DAYS...AND AFTER TROUGHS DISSIPATE...WILL LEAVE VERY WEAK FLOW ACROSS ENTIRE BASIN THROUGH EARLY TUE. SW N ATLC... A FRONTAL TROUGH CONTINUES E TO W ALONG 32N BETWEEN 60W AND 73W. SHOWERS AND TSTMS CONTINUE S OF THE BOUNDARY TO 27N UNDER GOOD DIFFLUENCE ALOFT. TO THE S...AN E TO W RIDGE EXTENDS ALONG 29N55W TO 24N80W. THIS RIDGE SHOULD RETREAT E TONIGHT ALLOWING A NEXT FRONTAL TROUGH TO ENTER THE AREA EXTENDING FROM 32N78W TO 28N80W EARLY SAT. THE TROUGH WILL MOVE E STALLING BEFORE REACHING BERMUDA SAT NIGHT THEN DRIFT BACK NW SUN AND BE N OF AREA MON NIGHT. A WIND SURGE MOVING ACROSS THE E AND NE CARIB ATTM ASSOCIATED WITH A TROPICAL WAVE THERE WILL ENHANCE THE TRADE WIND FLOW ACROSS FAR SE PORTIONS TO AROUND 15 KT NEXT 48 HOURS WITH SEAS BUILD 5-6 FT IN ELY WIND SWELL. CARIBBEAN SEA AND TROPICAL N ATLC... A TROPICAL WAVE MOVING INTO NICARAGUA AND HONDURAS...AND THE ADJACENT NW CARIB WILL CONTINUE TO MOVE W-NW..WITH ACTIVE CNVTN CONTINUING TO FIRE WITH AND BEHIND WAVE UNDER GOOD DIFFLUENCE ALOFT DUE TO UPPER TROUGH TO THE W. E-SE FLOW BEHIND THE WAVE AT 15-20 KT AND SEAS 5-7 FT WILL DIMINISH SLIGHTLY OVERNIGHT. S PORTION OF THE WAVE APPEARS TO HAVE BROKEN OFF AND IS CAUGHT UP IN THE MONSOONAL GYRE S OF PANAMA. A SECOND WAVE OVER THE E CARIBBEAN CONTINUES TO MOVE QUICKLY W NEAR 20 KT AND IS ACCOMPANIED BY A NARROW E-W BAND OF 20-25 KT WINDS BETWEEN 14.5N AND 17N...YIELDING STRONG LLVL CONVERGENCE AND VERY ACTIVE CNVTN. SEAS WITHIN THIS NARROW ZONE ARE 7-9 FT ACROSS THE N ATLC WATERS AND 6-8 FT INSIDE THE CARIB. THIS WAVE HAS BEEN SHARPLY TILTED SW TO NE BUT IS FORECAST TO BECOME MORE ERECT NEXT 48 HOURS AS IT TOO ENCOUNTERS THE EPAC MONSOONAL GYRE. WIND SURGE AND SEAS WILL SHIFT W WITH WAVE AND DIMINISH SLIGHTLY ACROSS THE CENTRAL CARIB SAT NIGHT AND SUN...AND W CARIB SUN AND SUN NIGHT. WARNINGS... SW N ATLC... .NONE. CARIBBEAN... .NONE. .GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER STRIPLING