11/3/2025 6:59:00 PM until 11/4/2025 7:00:00 PM

If driving, slow down, use your headlights, and leave plenty of distance ahead of you.

ESFGUM This Hydrologic Outlook is for Guam, Rota, Tinian and Saipan. A tropical disturbance developing in central Micronesia is being monitored by the Joint Typhoon Warning Center as Invest 90W, and as of Monday evening is located near 9N147E. Invest 90W is expected to move toward the Marianas by Wednesday, bringing potentially heavy downpours to the area in the second half of the week. After the system exits to the west, feeder bands along the leeside of the system may bring an extended period of rainfall for the rest of the week. Moderate uncertainty remains regarding potential rainfall impacts, but early estimates indicate this system to bring locally heavy rainfall of 5 to 8 inches across the Marianas by the weekend. With such rainfall, flash flooding remains a possibility Wednesday through Saturday. Uncertainty regarding mudslide risk during the weekend remains high. If feeder bands form, showers are likely to persist into the weekend, which would become more likely to saturate the soils enough to increase mudslide risk. Residents 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.