000 AGXX40 KNHC 211847 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 246 PM EDT WED APR 21 2010 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W GULF OF MEXICO... WEAK FRONTAL TROUGH TROUGH HAS DROPPED SE INTO THE NE GULF AND N FLORIDA TODAY AND WAS GENERALLY BENIGN IN TERM SO WEATHER OF THE NE GULF. A 1015 MB HIGH WAS CENTERED OVER THE CENTER OF THE GULF YIELDING MILD WINDS AND SLIGHT SEAS ACROSS THE BASIN. FRONT TO SLIDE E INTO THE SW ATLC WITH HIGH FOLLOWING SUIT AND ALLOWING FOR RETURN FLOW TO SET UP ACROSS W HALF OF GULF THU...WITH WINDS INCREASING 15-20 KT ACROSS W AND NW PORTIONS THU MORNING AND REACHING 20 KT ACROSS MUCH OF THE NW PART THU NIGHT...AND THEN 20-25 KT FAR NW BY FRI MORNING. NEXT COLD FRONT WILL MOVE OFF THE TEXAS COAST SAT AFTERNOON AND EXTEND FROM CENTRAL LOUISIANA COAST TO THE BAY OF CAMPECHE SAT EVENING THEN WEAKEN SUN. SW N ATLC AND TROPICAL ATLC W OF 55W... SOMEWHAT COMPLEX ASSORTMENT OF BOUNDARIES ARE STRUNG OUT ACROSS THE OPEN ATLC AS AN OLD WEAK FRONT HAS MERGED WITH ELONGATED LLVL TROFFING EXTENDING FROM THE SE BAHAMAS NE TO A CYCLONIC CURL NEAR 24N67W THEN E ALONG 24N AND OUT OF THE AREA. S TO SWLY FLOW OF 5 TO 15 KT PREVAILS TO THE SOUTH OF THIS BOUNDARY WITH A CONVERGENT BAND OF SHOWERS EXTENDING FROM N OF PUERTO RICO ENE TO BEYOND 60W...WHILE A FEW OTHER WEAKER SIMILAR BANDS EXISTED ACROSS THE AREA TOO. N-NE TO E FLOW NEAR 20 KT WAS OCCURRING N OF THE CYCLONIC CURL PRODUCING MIXED SEAS AT OR JUST BELOW 8 FT. HIGH PRES WAS OPENING UP AHEAD OF THE GLFMEX FRONTAL SYSTEM PRODUCING SE TO S WINDS 10-15 KT AND SLIGHTLY HIGHER BETWEEN FLORIDA AND 72W. FRONTAL TROUGH MOVING ACROSS N FLORIDA WILL SWEEP EWD ACROSS THE AREA N OF 26N THROUGH THU NIGHT WHILE ELONGATED TROUGHING AND ASSOCIATED BOUNDARIES WEAKEN...SINK SLIGHTLY S AND BEGIN TO LIFT OUT OF AREA. THIS TO ALLOW HIGH ACROSS THE GULF TO BUILD INTO W PORTIONS BY THU NIGHT YIELDING MODERATE NW TO N FLOW...AND ELY FLOW TO DEVELOP ACROSS THE S HALF OF BAHAMAS. HIGH WILL THEN SLIDE E ACROSS FLORIDA AND INTO THE SW N ATLC FRI WITH MODERATE NE TO E TRADES S OF 25N BECOMING SE TO S OFF THE E COAST OF FLORIDA...INCREASING SLIGHTLY TO AROUND 15 KT FRI NIGHT THROUGH SAT...INCREASING FURTHER TO 20 KT OVER THE W AND NW PORTIONS OF THE AREA SAT NIGHT AND SUN. CARIBBEAN... INDUCED INVERTED TROFFING PERSIST TODAY FROM THE S MONA PASSAGE TO GULF OF VENEZUELA WITH SELY FLOW 15 KT OR LESS TO THE E AND N TO NE FLOW W OF TROUGH TO 80W...WHILE LIGHT E TO SE FLOW PREVAILED ACROSS THE NW CARIB. MAX SEAS UNUSUALLY LOW AT NEAR 4 FT OFFSHORE OF PUERTO RICO AND BROADER AREA OF 4 TO POSSIBLY 5 FT IN THE SW CARIB. MODERATE ELY TRADES WILL RETURN TO THE BASIN E OF 70W BY THU EVENING AS ELONGATED TROFFING IN SW ATLC LIFTS OUT AND HIGH PRES BEGINS TO BUILD N OF 20N. TRADES TO FRESHEN FRI AND SPREAD W INTO THE W CARIB...BECOMING SELY IN THE FAR NW CARIB AS RETURN FLOW SETS UP IN THE GULF. SRN CARIB WILL RETURN TO TYPICAL NEAR 20 KT FLOW WITH 20-25 OFF COAST OF COLOMBIA FRI AND SAT AND SEAS BUILDING THERE 7-10 FT. WARNINGS... ATLC... .NONE. CARIBBEAN... .NONE. GULF OF MEXICO... .NONE. FOR ADDITIONAL INFORMATION PLEASE VISIT HTTP://WWW.HURRICANES.GOV/MARINE $$ FORECASTER STRIPLING