000 AGXX40 KNHC 271914 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 300 PM EDT THU AUG 27 2009 MARINE WEATHER DISCUSSION FOR THE GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... A LOW PRES TROUGH EXTENDS FROM THE FLORIDA PANHANDLE S TO 26N86W. AREAS OF SHOWERS AND TSTMS ARE ASSOCIATED WITH THIS BOUNDARY...MAINLY OVER THE NE GULF. THE TROUGH WILL WEAKEN THROUGH FRI AS HIGH PRES BUILDS OVER THE N GULF. A SECOND LOW PRES TROUGH IS LOCATED OVER THE BAY OF CAMPECHE FROM 18N91W TO 23N96W. ONLY ISOLATED SHOWERS ARE ASSOCIATED WITH THIS FEATURE. THE TROUGH SLOWLY WEAKENS AND SHIFTS SW THROUGH SUN...THEN DISSIPATES MON. A COLD FRONT WILL APPROACH THE FAR NW GULF LATE SAT NIGHT...THEN SLOWLY MOVE E TO NEAR THE FL BIG BEND BY MON. THE FRONT IS EXPECTED TO DIMINISH TUE OVER THE N GULF. WINDS SHOULD REMAIN BELOW 20 KT OVER THE N GULF ASSOCIATED WITH THIS FRONT. ELSEWHERE...LIGHT AND VARIABLE WINDS WILL PREVAIL THROUGH THE PERIOD. CARIBBEAN... A TROPICAL WAVE ALONG 77W WILL MOVE THROUGH THE CENTRAL CARIBBEAN OVER THE NEXT 24 HOURS...BEFORE REACHING THE CENTRAL AMERICAN COAST FRI NIGHT. QUIKSCAT PASS AROUND 1142 UTC SHOWED A BROAD AREA OF 20-25 KT WINDS BEHIND THE WAVE OVER THE CENTRAL CARIBBEAN FROM 11N-17N BETWEEN 67W-79W. A 1008 MB LOW PRES IS CENTERED NEAR 10N76W OR JUST W OF THE COLOMBIAN COAST. WINDS WILL REMAIN 20-25 KT AND SEAS WILL BUILD TO 8 TO 12 FT THROUGH SAT...THEN PERSIST INTO LATE SUN. A SECOND TROPICAL WAVE WILL MOVE INTO THE E CARIBBEAN MON. EXPECTING WINDS 20-25 KT WITH THIS WAVE AS IT ENTERS THROUGH THE N LEEWARD ISLANDS. SW N ATLC S OF 31N AND W OF 55W... TROPICAL STORM DANNY WAS LOCATED NEAR 27.5N 73.1W AT 12 UTC AND IS MOVING TO THE NW AROUND 11 KT. QUIKSCAT PASS AROUND 1000 UTC SHOWED THE STRONGEST WINDS ARE STILL CONFINED TO THE N AND NE SIDES OF THE STORM. A TIGHT PRES GRADIENT BETWEEN DANNY AND HIGH PRES OVER THE W ATLC IS ALLOWING THE STRONGEST WINDS TO REMAIN IN THOSE QUADRANTS. DANNY IS FORECAST TO STRENGTHEN OVER THE NEXT FEW DAYS POTENTIALLY REACHING HURRICANE STATUS. A SHIP REPORT RELAYED BY A HURRICANE RECON FLIGHT SHOWED SEAS TO 5 METERS IN THE SE QUADRANT OF DANNY. MOST OF THE SHOWER AND TSTM ACTIVITY IS FOCUSED ON THE E AND NE SIDES OF THE STORM. SEE LATEST NHC FORECAST/ADVISORY UNDER AWIPS/WMO HEADERS MIATCMAT5/ WTPZ25 KNHC FOR MORE DETAILS ON DANNY. FOR THE TROPICAL ATLC...MODERATE TRADES PERSIST MAINLY N OF 15N. A TROPICAL WAVE W OF THE AREA WILL APPROACH THE LESSER ANTILLES FRI INTO SAT...ALTHOUGH NO SIGNIFICANT IMPACT ON WINDS...SEAS...OR CONVECTION IS ANTICIPATED. WARNINGS ATLC... .AMZ080...TROPICAL STORM WARNING N OF 26N E OF 77W... CARIBBEAN... .NONE. GULF OF MEXICO... .NONE $$ FORECASTER BANKS/CHRISTENSEN