000 AGXX40 KNHC 210543 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 145 AM EDT TUE AUG 21 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... RIDGE ALONG 30N AND TROUGH OVER CARIBBEAN AND EASTERN MEXICO. THE RIDGE WILL GRADUALLY EXPEND AS THE HURRICANE DEAN MOVES INLAND OVER MEXICO AND WEAKENS IN THE MOUNTAINS DURING THURSDAY. BY SATURDAY THE ENTIRE AREA WILL BE COVERED BY LARGE BUT WEAK RIDGE. SURFACE... HURRICANE DANE WILL TRACK WEST OVER YUCATAN AND THE SOUTH GULF OF MEXICO THEN MOVE INLAND EARLY THURSDAY. TROPICAL WAVE NEAR 65W IN THE ATLANTIC AND OVER THE EASTERN CARIBBEAN WILL MOVE WEST AND THE POSSIBILITY EXISTS THAT A LOW PRESSURE MAY FORM ON THE WAVE NEAR 25N. THE WAVE WILL MOVE WEST AND REACH FLORIDA EARLY THURSDAY AND CONTINUE WEST. THE GFS MODEL WEAKENS THE SYSTEM OVER THE GULF OF MEXICO FRIDAY AND SATURDAY. OTHERWISE A RIDGE ALONG 30N WILL DOMINATE THE FLOW IN THE AREA. WARNINGS... SUBJECT TO CHANGE BASED ON LATEST NHC ADVISORY. ATLANTIC... NONE. CARIBBEAN... HURRICANE WARNING W OF 85W...AMZ082 GULF OF MEXICO... HURRICANE WARNING S OF 23N...GMZ082. FORECASTER LL