000 AGXX40 KNHC 170653 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 255 AM EDT THU JUN 17 2010 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC FROM 07N TO 22N BETWEEN 55W AND 65W...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W GULF OF MEXICO... 1019 MB HIGH PRES CENTERED NEAR 28N87W IS EXPECTED TO MEANDER THROUGH THE PERIOD OCCASIONALLY BEING ABSORBED IN AN ATLC RIDGE BUILDING W-NW ACROSS FLORIDA TO THE N CENTRAL GULF. OTHERWISE SEVERAL WEAK TROUGHS WILL MOVE SE OVER SOUTHERN GEORGIA/NORTHERN FLORIDA OCCASIONALLY DIPPING S INTO THE FAR NE GULF WATERS RESULTING IN A WEAK HIGH CENTER RE-DEVELOPING IN THE N CENTRAL GULF...AND BEING SEPARATED FROM THE ATLC RIDGE. A TROUGH IN THE FAR SW GULF AND W BAY OF CAMPECHE WILL REMAIN NEARLY STATIONARY THROUGH THE PERIOD. EXPECT DIURNALLY DRIVEN NE-E 15-20 KT WINDS TO OCCUR EVERY EVENING WITHIN 120 NM OF THE COAST OF THE YUCATAN PENINSULA. CARIBBEAN SEA AND TROPICAL N ATLC... E-SE WINDS 15-20 KT IN THE GULF OF HONDURAS ARE EXPECTED TO PERSIST THROUGH TONIGHT. EASTERLY TRADES OF 15-20 KT ARE NOTED ACROSS THE WATERS S OF 17N BETWEEN 70W AND 78W AND ARE BEING ENHANCED BY A TROPICAL WAVE S OF 17N ALONG 66W. THE WAVE WILL MOVE ACROSS THE CENTRAL CARIBBEAN TODAY AND TONIGHT...THEN INTO THE W CARIBBEAN FRI INTO SAT...AND WILL APPROACH CENTRAL AMERICA SUN. A TROUGH WHICH IS THE REMNANTS OF AN AREA OF LOW PRES IS ENTERING THE TROPICAL N ATLC STRETCHING FROM NEAR 20N54W TO 13N56W. SCATTERED SHOWERS AND TSTMS ARE FLARING UP NEAR THE TROUGH AXIS WITH MOST OF THE ACTIVITY BEING SHEARED FROM THE SW TO THE NE OF THE TROUGH AXIS. THE TROUGH WILL CONTINUE TO MOVE TO THE W-NW REACHING FROM 20N58W TO 13N59W LATER THIS MORNING... THEN FROM 22N64W TO 17N64W EARLY FRI...MOVING NW OF THE AREA FRI NIGHT. EXPECT A NE-SE WIND SHIFT AS THE TROUGH PASSES BY WITH EASTERLY TRADES OF 15-20 KT N OF 16N CONTINUING THROUGH THE PERIOD. AN EXPANDING EASTERLY FETCH WILL ALSO HELP TO DRIVE E SWELLS TO THE EXPOSED ATLC PASSAGES SAT AND SUN. THE NEXT TROPICAL WAVE WILL REACH TO NEAR 55W SAT...APPROACHING THE LEEWARD ISLANDS SUN. SW N ATLC... A FRONTAL TROUGH STRETCHING FROM NEAR 30N55W TO 30N70W WILL STALL ACROSS THE AREA TODAY...DISSIPATING ON THU. A SERIES OF WEAK TROUGHS WILL CLIP THE WATERS N OF 30N MOVING OFF THE SE GEORGIA/NE FLORIDA COAST TODAY THROUGH FRI WITH CONVECTION EXPECTED TO FIRE UP OUT AHEAD OF EACH OF THEM. OTHERWISE...AN ATLC RIDGE WILL STRETCH ALONG 28N TODAY THROUGH FRI...THEN WILL SHIFT N TO ALONG 30N SAT AND SUN AS A TROUGH ENTERS THE SE PORTION FROM THE TROPICAL N ATLC WATERS. THIS TROUGH WILL RESULT IN INCREASING EASTERLY FLOW OF 15-20 KT WITH A LENGTHENING FETCH BUILDING E SWELLS UP TO 10 FT E OF THE BAHAMAS LATE SAT THROUGH SUN. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER LEWITSKY