Headline:
Flood Watch issued September 21 at 3:35PM ChST until September 23 at 10:00PM ChST by NWS Tiyan GU
Event:
Flood Watch
Urgency:
Future
Effective:
September 20, 2026 - 10:35pm
Expires:
September 21, 2026 - 1:15pm
Description:
* 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
Instruction:
You should monitor later forecasts and be prepared to take action
should Flash Flood Warnings be issued.
Area Description:
Guam
Forcast Office:
NWS Tiyan GU
Sender:
w-nws.webmaster@noaa.gov