Flood Watch
NWS Tiyan GU ยท US
Details
Flood Watch In Effect From Tuesday Morning Through Wednesday Evening
- Event
- Flood Watch
- Issued
- Onset
- Message expires
- Expected end
- Category
- Meteorological
- Urgency
- Future
- Severity
- Severe
- Certainty
- Possible
- Response
- Prepare
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
Instructions
You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued.
Affected areas
- Guam
Public contact
- Issuer
- NWS Tiyan GU
- Website
- http://www.weather.gov
Message record
- Received
- Issue to receipt
- ~36s
- CAP status
- Actual
- CAP message type
- Alert
- Lifecycle
- New
- Source
- NWWS-OI
- Feed
- NWWS
- Recovered
- No
CAP routing and identity
- ULID
- 01M317CTZNRNRJP4RNKPG71JNX
- Identifier
- urn:oid:2.49.0.1.840.0.bf17ea4cf9546607f5db1bbfe342e6552a735ec4.001.1
- Sender
- w-nws.webmaster@noaa.gov
- Scope
- Public
- CAP source
- 211803 v2.3.0
- Handling codes
- IPAWSv1.0
- Issuing office
- NWS Tiyan GU
- AWIPS ID
- CAPGUM
- NWWS sequence
- nwws_processor.8125
- WMO heading
- XOMY50
- WMO data type
- CAP alert message XML (XO)
- WMO bulletin number
- 50
Event codes
| Name | Value |
|---|---|
| SAME | FFA |
| NationalWeatherService | FAA |
Parameters
| Name | Value |
|---|---|
| AWIPSidentifier | FFAGUM |
| WMOidentifier | WGMY60 PGUM 210535 |
| NWSheadline | FLOOD WATCH IN EFFECT FROM TUESDAY MORNING THROUGH WEDNESDAY EVENING |
| BLOCKCHANNEL | EAS |
| BLOCKCHANNEL | NWEM |
| EAS-ORG | WXR |
| VTEC | /O.NEW.PGUM.FA.A.0005.260922T0000Z-260923T1200Z/ |
| eventEndingTime | 2026-09-23T22:00:00+10:00 |
| BLOCKCHANNEL | CMAS |
Locations
Location data
- Guam
| Name | Value |
|---|---|
| SAME | 066010 |
| UGC | GUZ001 |