FGMY70 PGUM 160348 ESFGUM GUC010-MPC100-110-120-160500- Hydrologic Outlook National Weather Service Tiyan GU 148 PM ChST Fri Oct 16 2026 ...HYDROLOGIC OUTLOOK UPGRADED TO FLOOD WATCH... This Hydrologic Outlook has been replaced by the Flood Watch, out for Guam, Rota, Tinian and Saipan. Residents on these islands need to closely monitor this developing situation as flood watches, advisories and flash flood warnings could be issued later. If living near streams and rivers, prepare to move items away from stream and river banks. Make sure storm drains nearby are not clogged, especially If living at low-lying areas. $$ EM