039 FPMY70 PGUM 301750 NOWMY SHORT TERM FORECAST NATIONAL WEATHER SERVICE TIYAN GU 350 AM CHST TUE JUL 31 2012 PMZ151-301800- GUAM WATERS- 350 AM CHST TUE JUL 31 2012 .NOW... THROUGH 500 AM...A LINE OF SHOWERS WILL MOVE ACROSS THE WATERS EAST OF THE ISLAND OF GUAM. SOME OF THESE SHOWERS MAY BRIEFLY LOWER VISIBILITIES AND BE ACCOMPANIED BY WIND GUST TO 30 KTS. $$ ZIOBRO