924
WGMY60 PGUM 210535
FFAGUM
URGENT - IMMEDIATE BROADCAST REQUESTED
Flood Watch
National Weather Service Tiyan GU
335 PM ChST Mon Sep 21 2026
GUZ001-212015-
/O.NEW.PGUM.FA.A.0005.260922T0000Z-260923T1200Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Guam-335 PM ChST Mon Sep 21 2026
...FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH WEDNESDAY
EVENING...
* WHAT...Flash flooding caused by excessive rainfall is possible.
* WHERE...Guam.
* WHEN...From Tuesday morning through Wednesday evening.
* 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. Low-water
crossings may be flooded.
* ADDITIONAL DETAILS...
- Heavy rainfall from Invest 91W located south of Guam may lead to
flash flooding Tuesday through Wednesday evening. Guidance shows
2 to 5 inches of rain falling during the watch period as Invest
91W moves just west of Guam. Many locations across Guam have
already seen 2 to 4 inches of rain since Saturday and soils
remain wet from heavy rainfall the last couple of weeks. This
will allow for a lower threshold for flash flooding over the next
couple of days.
- 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