000 FPMY70 PGUM 150516 NOWMY SHORT TERM FORECAST NATIONAL WEATHER SERVICE TIYAN GU 317 PM LST FRI AUG 15 2003 PMZ151-150800- GUAM WATERS- .NOW... ISOLATED THUNDERSTORMS HAVE DEVELOPED ACROSS THE COASTAL WATERS OF GUAM...WHERE LOCALLY HEAVY SHOWERS AND LIGHTNING CAN BE EXPECTED THROUGH 6 PM. MARINERS SHOULD ALSO WATCH OUT FOR REDUCED VISIBILITIES IN SHOWERS. $$ C MA