Flood Warning Issued for Chehalis River in Grays Harbor and Thurston Counties
This alert is no longer in effect.
NOAA issued it on April 6, 2026, 4 months ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
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The National Weather Service has issued a Flood Warning for the Chehalis River above Grand Mound, with minor flooding expected to impact roads and farm lands through early Monday.
Read this weather record in 30 seconds
- Record type
- Flood Warning
- Affected area
- Western Washington
- Issued
- April 6, 2026
- Issuing authority
- NWS Seattle WA
Flood notices turn on location and timing. Treat the named area as this record's scope; do not assume nearby counties, parishes, or waterways were included.
Record status: historical. It was issued 4 months ago; use the issuing agency's live warning service for current conditions in Western Washington.
Alert Details
The National Weather Service in Seattle, WA, has issued a Flood Warning for the Chehalis River above Grand Mound. This alert is a re-issuance of a previous warning, updated with the latest hydrological information regarding rising water levels.
Affected Areas
The warning specifically impacts Grays Harbor and Thurston counties in Washington. The primary area of concern is the Chehalis River above Grand Mound. At the forecast flood levels, several roads in Independence Valley will be affected, including James Road, Independence Road, and Moon Road. Nearby farm lands are also expected to be covered by flood waters.
What You Should Do
Motorists are urged to follow the safety mantra: "Turn around, don't drown." Most flood-related deaths occur in vehicles. Do not attempt to drive around barricades or navigate cars through flooded areas. Residents should be especially cautious at night when it is significantly harder to recognize the dangers of flooding.
Expected Conditions
Minor flooding is forecast for the region. As of 10:00 PM PDT Friday, the river stage was measured at 140.8 feet, just below the flood stage of 141.0 feet. The river is expected to rise above flood stage shortly after midnight tonight and reach a crest of 142.3 feet late Saturday evening.
Timeline
The Flood Warning is effective from March 13 at 10:50 PM PDT until 4:51 AM PDT on Monday, March 16. The river is expected to rise above flood stage after midnight on Saturday and is projected to fall below flood stage by Sunday evening.
Original source: NOAA Official Notice ↗
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