000 AGXX40 KNHC 051658 MIMATS MARINE WEATHER DISCUSSION NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL 1258 PM EDT WED SEP 5 2007 MARINE WEATHER DISCUSSION FOR GULF OF MEXICO...CARIBBEAN SEA AND SOUTHWEST NORTH ATLC S OF 31N W OF 55W. UPPER LEVELS... TROUGH OVER THE WESTERN ATLANTIC NORTH OF 25N WEST OF 65W WILL STRENGTHEN AND MOVE LITTLE THEN DRIFT WEST THROUGH SUN. OTHERWISE WEAK RIDGE WILL PREVAIL OVER THE AREA. SURFACE... LOW EAST OF NORTH FLORIDA WITH A TROUGH TO CENTRAL CUBA WILL MOVE LITTLE THROUGH THURSDAY WITH THE LOW POSSIBLY DEVELOPING INTO A TROPICAL CYCLONE. THE LOW WILL MOVE WNW BEGINNING THURSDAY NIGHT AND PASS NORTH OF 31N NEAR 78W SAT. WINDS ARE FORECAST TO BE IN THE 20 TO 30 KT RANGE BUT THIS WILL DEPEND ON POSSIBLE TROPICAL CYCLONE DEVELOPMENT. RIDGE ALONG 24N EAST OF THE TROUGH WILL BUILD NORTH AND WEST AS THE FLOW AROUND THE LOW BECOMES MORE CIRCULAR AND THE LOW MOVES NORTH AFTER THURSDAY. THE RIDGE WILL BE ALONG 27N SUNDAY. OTHERWISE THE WINDS ARE LESS THAN NORMAL WITH A CLIMATOLOGICAL FLOW PATTERN. WARNINGS... ATLANTIC... NONE. CARIBBEAN... NONE. GULF OF MEXICO... NONE. FORECASTER LL