000 AGXX40 KNHC 201901 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 300 PM EDT TUE APR 20 2010 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W GULF OF MEXICO... MID/UPPER S/W WITH EMBEDDED MID LEVEL VORT MOVING E ACROSS FAR NW GULF AND OVERRIDING WEAK FRONTAL TROUGH STRETCHED FROM FLORIDA PANHANDLE TO UPPER MEXICAN COAST...WITH ISOLATED DEEP CNVTN IN ERN QUAD OF VORT NOW S OF LOUISIANA. WEAK TROFFING STILL LOOKS TO PERSIST ACROSS THE FAR SW GULF JUST OFF THE COAST WITH CONVERGENCE BETWEEN THIS AND THE FRONTAL TROUGH YIELDING SCATTERED MODERATE CNVTN ALONG 23/24N W OF 94W. WINDS REMAIN LIGHT TO MODERATE ACROSS THE BASIN WITH SEAS 3 FT OR LESS. FRONTAL TROUGH TO BE CARRIED E NEXT 24 HOURS AND FORECAST TO REACH TAMPA BAY AREA TO NEAR 25N98W BY WED MORNING WITH MILD WINDS AND SEAS PERSISTING. HIGH PRES TO MOVE INTO THE NE GULF WED NIGHT AND THU IN THE WAKE OF THE EXITING FRONTAL TROUGH MOVING E ACROSS THE SW ATLC...AND INDUCE A SE TO S RETURN FLOW ACROSS THE AT 15-20 KT WINDS THU NIGHT AND FRI AND SPREAD ACROSS MOST OF THE GULF ON SAT AHEAD OF THE NEXT COLD FRONT WHICH WILL MOVE OFF THE TEXAS COAST SAT AFTERNOON. SW N ATLC AND TROPICAL ATLC W OF 55W... WEAK COLD FRONT SINKING S ACROSS 30N YDA HAS BECOME DIFFUSE ACROSS THE NW BAHAMAS EXTENDING E-SE TO ALONG ABOUT 70W WHERE IT MERGES WITH THE ELONGATED TROFFING OF THE PAST FEW DAYS...WHICH EXTENDS E ALONG 26N AND THEN OUT OF AREA AND NE INTO THE CENTRAL ATLC. MORNING SCATTEROMETER PASSES INDICATE NLY FLOW OF 20-25 KT OUT TO 150 NM N OF TROUGH E OF 75W...WHERE SEAS ARE TO NEAR 9 FT. S TO SWLY FLOW OF 10 TO 15 KT PREVAIL S OF THIS BOUNDARY. THIS ELONGATED LOW PRES AREA WILL BE FORCED SLOWLY SE NEXT 48 HOURS AND EXTEND FROM NEAR NW COAST OF HISPANIOLA NE TO NEAR 25N60W BEFORE DISSIPATING. GLFMEX FRONTAL SYSTEM WILL EXIT THE N FLORIDA COAST AND MOVE E ACROSS THE SW ATLC WED THROUGH THU BEFORE DISSIPATING ACROSS THE AREA WATERS THU NIGHT. SW TO S FLOW NEAR 20 KT WILL LIKELY OCCUR E OF THE THIS SECOND FRONT N OF 27N AS IT MOVES ACROSS THE AREA. OTHERWISE LIGHT TO MODERATE WINDS AND SEAS MODERATE INTO THE WEEKEND. CARIBBEAN... SHARP INDUCED TROF ACROSS THE CENTRAL CARIB FROM COLOMBIAN COAST NE TO NEAR MONA PASSAGE TODAY...WITH MODERATE SE FLOW TO THE E AND LIGHT TO MODERATE N TO NE FLOW TO THE W...AND WINDS GRADUALLY VEERING TO E-NE IN THE FAR NW CARIB. MAXIMUM SEAS IN THE BASIN LIKELY AROUND 4 FT IN THE SW CARIB...AS WELL AS NEAR 4 FT OFF S PUERTO RICO COAST. LITTLE CHANGE EXPECTED IN OVERALL CONDITIONS THROUGH WED NIGHT BEFORE HIGH MOVING IN BEHIND SW ATLC FRONT ON WED-THU VEERS WINDS ACROSS THE BASIN BACK TO A MORE ELY DIRECTION...BRINGING MODERATE TRADES TO THE E HALF OF CARIB THU...FRESH ALONG THE SRN CARIB...AND SPREADS TO THE W HALF BY FRI. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER STRIPLING