000 AGXX40 KNHC 041905 MIMATS MARINE WEATHER DISCUSSION NWS NATIONAL HURRICANE CENTER MIAMI FL 205 PM EST MON MAR 04 2013 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND TROPICAL N ATLC...AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... 1023 MB HIGH PRES IN THE NE GULF WILL SHIFT EASTWARD ACROSS THE FLORIDA PENINSULA TONIGHT. FRESH TO STRONG SOUTHERLY RETURN FLOW IN THE NW GULF WILL SPREAD TO THE N CENTRAL GULF WATERS AS THIS OCCURS AHEAD OF THE NEXT COLD FRONT. SEAS WILL BE 5-8 FT IN THE AREA OF STRONGER WINDS AND 2-4 FT ELSEWHERE CLOSER TO THE HIGH. THE FRONT WILL PUSH INTO THE NW GULF EARLY TUE MORNING REACHING FROM THE WESTERN FLORIDA PANHANDLE TO NEAR TAMPICO MEXICO BY TUE EVENING...THEN FROM SW FLORIDA NEAR FORT MYERS TO THE SW GULF BY WED MORNING...FINALLY SHIFTING SE OF THE GULF WED NIGHT. FRESH TO STRONG WINDS WILL BUILD SEAS TO 6-9 FT BEHIND THE FRONT... DIMINISHING FROM W TO E BEGINNING WED NIGHT AS HIGH PRES SHIFTS INTO THE NW GULF FROM TEXAS. THIS HIGH WILL MOVE NE TOWARD THE CAROLINAS BY THE END OF THE WEEK ALLOWING FOR MODERATE TO FRESH SOUTHERLY RETURN FLOW TO DOMINATE THE GULF WATERS BY SAT. CARIBBEAN SEA AND TROPICAL N ATLC S OF 22N W OF 55W... A COLD FRONT EXTENDS FROM NEAR EASTERN PUERTO RICO SW TO NEAR 16N74W TO NEAR THE PANAMA/COLOMBIA BORDER. FRESH TO STRONG NORTHERLY WINDS REMAIN IN THE SW GULF BEHIND THE FRONT ALONG WITH DECAYING SEAS OF 8-12 FT IN NW-N SWELL. THE FRONT WILL LOOSE DEFINITION AS IT EXTENDS FROM THE NE CARIBBEAN THROUGH 16N69W TO 15N76W BY TUE MORNING...DISSIPATING BY TUE NIGHT. FRESH TO STRONG NE-E WINDS...LOCALLY TO 30 KT NEAR THE COAST OF COLOMBIA...WILL SETUP ACROSS THE CENTRAL CARIBBEAN TUE AS HIGH PRES BUILDS N OF THE REGION. THESE WINDS WILL SHRINK IN COVERAGE TO JUST N OF SOUTH AMERICA BY WED AFTERNOON AS THE HIGH WEAKENS AND RETREATS TO THE NE AHEAD OF A COLD FRONT. THE TAIL END OF THAT FRONT WILL PUSH INTO THE NW CARIBBEAN WED NIGHT... DISSIPATING ALONG 19N ON THU. A BRIEF WIND SHIFT AND SPURT OF 20 KT WINDS IS ANTICIPATED BEHIND THE FRONT IN THE LEE OF CUBA TO THE YUCATAN CHANNEL. MEANWHILE...N-NE 20-25 KT WINDS WILL EXIST WITHIN 90-120 NM OF THE COAST OF NICARAGUA WED NIGHT INTO THE WEEKEND WITH A RIDGE OF HIGH PRES STRETCHED OUT ALONG INTERIOR CENTRAL AMERICA AND SEMI-PERMANENT LOW PRES OVER NW COLOMBIA. OTHERWISE...EXPECT MAINLY MODERATE NE-E WINDS ACROSS THE BASIN. IN THE TROPICAL N ATLC...MODERATE EASTERLY WINDS WILL DOMINATE THROUGH THE WEEK INTO THE WEEKEND. THE ONLY EXCITEMENT WILL BE IN THE WATERS N OF 19N WHERE THE TAIL END OF THE ATLC PORTION OF THE FRONT MENTIONED ABOVE WILL SKIRT THROUGH. THIS WILL RESULT IN A BRIEF WIND SHIFT. SEAS WILL BE PRIMARILY 4-7 FT THROUGH THE FORECAST PERIOD IN MIXED NE AND NW SWELL...WITH A PULSE OF LARGE NW SWELL ENTERING THE WATERS N OF 19N/20N BY NEXT WEEKEND. SW N ATLC S OF 31N W OF 55W... A SERIES OF FRONTAL BOUNDARIES/TROUGHS WILL SWEEP ACROSS THE SW N ATLC THROUGH THE WEEK. THE EASTERN MOST COLD FRONT CURRENTLY REACHES FROM 30N55W TO NEAR EASTERN PUERTO RICO. A SURFACE TROUGH IS TO THE W OF THE FRONT EXTENDING FROM 31N59W TO THE TURKS AND CAICOS...WITH YET ANOTHER TROUGH TO THE W REACHING FROM NEAR BERMUDA THROUGH 27N72W TO THE NORTHERN BAHAMAS. A REINFORCING SURGE OF W-NW WINDS IS ARRIVING WITH THE WESTERN MOST TROUGH AND A GALE WARNING IS IN EFFECT FOR AMZ113-115 N OF 28N. SEAS WILL BUILD TO 12 TO 15 FT IN THE AREA OF GALE WINDS BY THIS EVENING. THE GALE CONDITIONS WILL SHIFT E OF THE OFFSHORE WATERS BY LATE TONIGHT. HIGH PRES WILL BRIEFLY BUILD IN BEHIND ALL OF THESE BOUNDARIES FROM THE FLORIDA PENINSULA EASTWARD ALONG 27N/28N...ALTHOUGH IT WILL QUICKLY MIGRATE EASTWARD AHEAD OF THE NEXT COLD FRONT. THAT FRONT WILL ENTER THE FAR NW PORTION OF THE BASIN FROM THE GA/FL COAST LATE TUE NIGHT WITH GALE FORCE WINDS FORECAST N OF 28N BOTH AHEAD OF AND BEHIND THE FRONT. THE FRONT WILL REACH FROM 31N77W TO NEAR MELBOURNE FLORIDA BY WED MORNING...FROM 31N70W TO THE STRAITS OF FLORIDA WED EVENING... FROM 31N64W TO THE SE BAHAMAS THU MORNING...FROM 31N56W TO THE NE DOMINICAN REPUBLIC FRI MORNING...AND FINALLY SHIFTING E OF THE AREA SAT. THIS FRONT WILL STEM FROM DEVELOPING AND SLOW MOVING LOW PRES CENTERED WELL N OF 31N. ADDITIONAL TROUGHS WILL ROTATE THROUGH THE BASIN AROUND THE LOW AND BEHIND THE FRONT WITH FRESH TO GALE FORCE WINDS PERSISTING FOR AN EXTENDED PERIOD OF TIME. THIS PROLONGED EPISODE OF THE WINDS WILL GENERATE SIGNIFICANT WAVE HEIGHTS OF AT LEAST 20 FT ALONG 30N/31N BY THE END OF THE WEEK. NOTE...GRIDDED MARINE FORECAST IS AVAILABLE AT WWW.NHC.NOAA.GOV/TAFB/GRIDDED_MARINE WARNINGS... GULF OF MEXICO... .NONE. CARIBBEAN SEA AND TROPICAL N ATLC... .NONE. SW N ATLC... .GALE WARNING AMZ113 N OF 28N THROUGH 00 UTC. .GALE WARNING AMZ115 N OF 28N THROUGH 06 UTC. .GALE WARNING AMZ111 N OF 28N 06 UTC WED THROUGH 06 UTC THU. .GALE WARNING AMZ113 N OF 28N 12 UTC WED THROUGH 00 UTC FRI. .GALE CONDITIONS EXPECTED AMZ115 N OF 28N 00 UTC THU THROUGH 00 UTC SAT. FOR ADDITIONAL INFORMATION PLEASE VISIT WWW.HURRICANES.GOV/MARINE $$ FORECASTER LEWITSKY