Chehalis River Flow Today
As of October 2, 2026 at 12:45 AM, the Chehalis River is flowing at 416 cfs at Porter, WA — 85% of normal for the date and down 3% in 24 hours. 4 of 4 USGS gauges reported in the last 3 days; flows range from 48 to 416 cfs. ❤ Favorite
Chehalis River map
See the Chehalis River on a live map
Every gauge, dam and paddle run on the river, one tap each:
- Gauges now — which reaches are high or low
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Chehalis River conditions today
Where the river is running versus normal, what’s rising or dropping, and what it means for a trip — built from the live USGS readings below.
At Porter, the Chehalis River is running 416 cfs — 85% of normal, down 3% since yesterday. Along the river, 3 of 4 reporting gauges are below normal (the typical gauge is at 79% of normal).
In the last 24 hours the river is rising at Grand Mound (+12%); dropping at Doty (-17%).
Highest against normal: Grand Mound at 108%. Lowest: Adna at 67%.
How the Chehalis River compares to normal
Every reporting gauge from the top of the river to the bottom: bar length is today’s flow, colour is percent of normal for the date.
Flow along the river, upstream to downstream
- Doty324 ft 48 cfs74%
- Adna195 ft 94 cfs67%
- Grand Mound134 ft 302 cfs108%
- Porter28 ft 416 cfs85%
Bar length uses a square-root scale so small headwater flows stay visible next to big downstream ones. Colour: <50% 50–90 90–110 110–150 150%+ of normal.
Where every gauge sits
One dot per Chehalis River streamgauge, placed by its own percent of normal. The line is the typical gauge (79%).
Chehalis River flow report
| Streamgage | Streamflow | % of normal | 24h | Gage height | To flood stage | Elevation |
|---|---|---|---|---|---|---|
|
Chehalis River Near Doty WA
Oct 2, 12:30 AM · USGS 12020000 |
48 cfs | 74% | -17% | 306.23 ft | 11.8 ft below | 324 ft |
|
Chehalis River Near Adna WA
Oct 2, 1:00 AM · USGS 12021800 |
94 cfs | 67% | -9% | 193.07 ft | · | 195 ft |
|
Chehalis River Near Grand Mound WA
Oct 2, 1:00 AM · USGS 12027500 |
302 cfs | 108% | +12% | 129.03 ft | 12.0 ft below | 134 ft |
|
Chehalis River At Porter WA
Oct 2, 12:45 AM · USGS 12031000 |
416 cfs | 85% | -3% | 30.76 ft | 17.2 ft below | 28 ft |
USGS provisional data. Readings are in each gauge’s local time; gauges silent for more than 3 days are marked “Last reported”. Tap any gauge for its hydrograph, forecast and history.
Dams & reservoirs on the Chehalis River
Releases from these dams shape the flow downstream. Tap one for its daily level and history.
Chehalis River streamflow over time
Daily total flow across every monitored gauge on the river.
Maximum streamflow by year
Chehalis River
The Chehalis River is a 126-mile long river that flows through western Washington State. It has two main tributaries, the East Fork Chehalis and the West Fork Chehalis. The river was an important resource for Native American tribes such as the Chehalis and Chinook for centuries before European settlers arrived. Today, the Chehalis River is used for a variety of recreational activities such as fishing, kayaking, and camping. It is also used for agricultural purposes, with farms and pastureland located along its banks. The river is home to several reservoirs and dams, including the Mossyrock and Mayfield Dams, which provide hydroelectric power and flood control for surrounding communities. Despite these measures, the Chehalis River is prone to flooding during heavy rain events.
Fishing near the Chehalis River
About the Chehalis River
How is the Chehalis River flowing right now?
As of October 2, 2026, the Chehalis River is flowing at 416 cfs at Porter, WA, about 85% of normal for the date. Across its 4 USGS gauges, current flows range from 48 to 416 cfs. Every gauge’s live reading is in the table above.
Is the Chehalis River running high or low?
The typical gauge on the Chehalis River is at 79% of normal for the date. Above 100% means higher than the historical average for this calendar day; below 100% means lower. The profile above shows which reaches are high or low.
What is flood stage on the Chehalis River?
The National Weather Service sets flood stages for Doty (318.0 ft), Grand Mound (141.0 ft), Porter (48.0 ft). The table shows how far each gauge is below its flood stage right now.
Where does the data come from?
Discharge and gage height are from the USGS National Water Information System; flood stages from the National Weather Service. The history chart sums every monitored gauge on the river.
Can I get alerts for a gauge?
Yes — open any gauge from the table, favorite it in the Snoflo app and set a flow threshold.