


Flash Flood Watch
Issued by NWS Tiyan, Guam
Issued by NWS Tiyan, Guam
231 WGMY60 PGUM 291716 FFAGUM URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Tiyan GU 316 AM ChST Mon Jun 30 2025 MPZ001-291830- /O.CAN.PGUM.FA.A.0001.000000T0000Z-250629T2000Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Rota- 316 AM ChST Mon Jun 30 2025 ...FLOOD WATCH IS CANCELLED... The Flash Flood Watch is cancelled for Rota. The flash flooding threat has ended. Therefore, the Flash Flood Watch is being cancelled. $$ GUZ001-300815- /O.EXT.PGUM.FA.A.0001.000000T0000Z-250701T0700Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Guam- 316 AM ChST Mon Jun 30 2025 ...FLOOD WATCH NOW IN EFFECT THROUGH TUESDAY AFTERNOON... * WHAT...Flash flooding caused by excessive rainfall continues to be possible. * WHERE...Guam. * WHEN...Through Tuesday afternoon. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Between 4 and 8 inches of rain has fallen over the last few days across Guam. A monsoon disturbance well northeast of the region will allow for a wet southwesterly pattern to develop across the region over the next couple of days, bringing higher likelihood for locally heavy showers. An additional 2 to 4 inches of rain will be possible through Tuesday afternoon, which could lead to flash flooding. - http://www.weather.gov/safety/flood PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Williams