6/30/2025 3:16:00 AM until 6/30/2025 6:15:00 PM

You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.

* 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