000 AGXX40 KNHC 101624 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1225 PM EDT THU MAY 10 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. GULF OF MEXICO... WEAK 1016 MB HIGH PRES IS CENTERED NEAR 28N91W. SHIP AND BUOY OBSERVATIONS VERIFY THAT RELATIVELY LIGHT FLOW IS IN PLACE AROUND THIS HIGH PRES SYSTEM. LITTLE CHANGE IS EXPECTED THROUGH THE WEEKEND INTO EARLY NEXT WEEK AS THE HIGH PRES SHIFTS SLOWLY S IN THE W CENTRAL GULF. CARIBBEAN AND TROP N ATLC... A WEDGE OF HIGH PRES EXTENDS FROM THE CENTRAL ATLC INTO THE WINDWARD ISLANDS. THE TIGHT GRADIENT AROUND THE PERIPHERY OF THE HIGH IS ALLOW FRESH ELY FLOW OVER THE EASTERN HALF OF THE CARIBBEAN. LITTLE CHANGE IS EXPECTED INTO EARLY NEXT WEEK. MODERATE TO FRESH ELY FLOW WILL PERSIST ACROSS THE TROP N ATLC. FURTHER W...A STATIONARY TROUGH ORIENTED N-S ALONG 80W S OF CUBA IS MAINTAINING FAIRLY LIGHT FLOW OVER THE WESTERN CARIBBEAN. SW N ATLC... WHAT WAS SUBTROPICAL STORM ANDREA WAS DOWNGRADED TO SUBTROPICAL DEPRESSION ANDREA THIS MORNING. THIS WAS BASED ON REPORTS FROM AN AIR FORCE RECONNAISSANCE FLIGHT THAT SHOWED FLIGHT LEVEL WINDS BARELY AT TROPICAL STORM STRENGTH...INDICATING BELOW TROPICAL STORM STRENGTH CONDITIONS AT THE SURFACE. AREA SHIP AND BUOY OBSERVATIONS ARE ALSO INDICATING THE STORM IS WEAKENING BELOW TS THRESHOLDS. SATELLITE IMAGERY SHOWS MOST OF THE CONVECTION WELL TO EAST OF THE SYSTEM CENTER AS WELL. ANDREA WILL CONTINUE TO WEAKEN THROUGH SAT THEN DISSIPATE...LEAVING GENERALLY A WEAK PRES PATTERN OVER THE WATERS OFF NE FLORIDA INTO SUN. A COLD FRONT IS EXPECTED TO PUSH INTO WATERS N OF 25N BY LATE SUN...WITH FRESH TO STRONG NELY WINDS PERSISTING THROUGH MON. FURTHER E...SATELLITE IMAGERY AND SHIP OBSERVATIONS HINT A TROUGH MAY BE FORMING NEAR 28N68W. GFS...NAM...NOGAPS AND ECMWF DEVELOP THIS SYSTEM AND LIFT IT OUT TO THE E AND NE. HOWEVER...DIFFERENCES REMAIN WRT TIMING AND INTENSITY. AT ANY RATE...THIS FEATURE WILL DEEPEN NE OF THE SW N ATLC MARINE ZONE FRI INTO SAT AND BE OF MINIMAL IMPACT IN THAT AREA. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER CHRISTENSEN