Chehalis River at Porter, WA
Is Chehalis River at Porter, WA flooding right now?
Chehalis River at Porter, WA measured 30.58 ft on 2026-09-11 01:45:00 UTC. That observation was 17.4 ft below its 48 ft flood stage. This is the latest available reading, not a guarantee of current conditions.
Gauge height
30.58 ft
Streamflow
350 cfs
Minor flooding here begins at 48 ft, with major flooding at 52 ft. The highest crest on record was 53.17 ft on Wed, Dec 5, 2007.
Flood forecast
Flood stages at this gauge
| Category | Stage | Current distance |
|---|---|---|
| Action | 45.5 ft | 14.9 ft below |
| Minor flood | 48 ft | 17.4 ft below |
| Moderate flood | 50 ft | 19.4 ft below |
| Major flood | 52 ft | 21.4 ft below |
Highest crests on record
| Stage | Date |
|---|---|
| 53.17 ft | 2007-12-05 |
| 52.01 ft | 2022-01-08 |
| 49.64 ft | 2025-12-12 |
| 49.18 ft | 2021-01-15 |
| 48.99 ft | 2020-01-09 |
Nearby gauges
| Gauge | Distance | County |
|---|---|---|
| Chehalis River near Satsop, WA | 8.7 mi | Grays Harbor County |
| Satsop River near Satsop, WA | 9.5 mi | Grays Harbor County |
| Chehalis River near Rochester, WA | 12.9 mi | Thurston County |
| Chehalis River near Montesano, WA | 13.8 mi | Grays Harbor County |
| Kennedy Creek near New Kamilche, WA | 15.1 mi | Mason County |
Get a flood alert for this gauge
Free email alerts when this gauge approaches flood stage are coming soon. Leave your email and you'll be first in line.
One email when alerts launch, then only flood notifications. No spam, unsubscribe anytime.
Provisional data: Real-time readings are provisional and subject to revision by the USGS — sensors can be affected by ice, debris, or equipment malfunction. Do not rely on this site for decisions involving personal safety; follow official guidance from the National Weather Service and local authorities.