Newaukum River near Chehalis, WA
River level and flood forecast · Lewis County
The river is 10.1 ft below flood stage (202.5 ft).
Forecast to hold near 192.4 ft through Mon, Oct 19, 5 PM.
Flow: 39 cubic feet per second (USGS).
The last 7 days and the forecast
NWS forecast issued Mon, Oct 12, 8:27 AM. Forecasts change as rain falls and as upstream water arrives.
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An email when the National Weather Service forecasts Newaukum River near Chehalis to flood, when it floods, and when it's over.
Flood stages
| Major flood stage | 205.5 ft |
| Moderate flood stage | 204.5 ft |
| Flood stage | 202.5 ft |
| Action stage | 200.5 ft |
| Record crest (January 6, 2022) | 205.59 ft |
What floods at each level
From the National Weather Service, highest first.
- 205.5 ftflood waters will inundate most roads and a majority of residential and commercial areas within the region. Swift flood waters will become deep and hazardous, especially near river channels. A stage of 205.5 feet on the Newaukum corresponds to Phase 4 in the Lewis County flood system. Flooding will occur all along the river including headwaters, forks, tributaries, and other streams within and near the Newaukum River Basin.
- 204.5 ftdeep and hazardous flood waters will inundate many roads and residential and commercial areas along the Newaukum River and its forks. Impacted roadways and surrounding areas include SR 508, Jackson Hwy. and Tune, Rush, Sommerville, Griel, Hamilton, Tauscher, Guerrier, Kirkland, Macomber, Rice, Senn, Lucas Creek, Middle Fork and North Fork, Bishop, Shorey, Labree, Gish, Yates Roads. A stage of 204.5 feet on the Newaukum roughly corresponds to Phase 3 flood in the Lewis County flood system.
- 202.5 ftflood waters will inundate many roads and residential and commercial areas along the Newaukum River and its forks. Flooding in some areas may be deep and hazardous especially near rivers. Impacted roadways and surrounding areas include Jackson Hwy. and Tune, Rush, Sommerville, Griel, Hamilton, Tauscher, Guerrier, Kirkland, Macomber, Rice, Senn, Lucas Creek, Middle Fork and North Fork Roads. A stage of 202.5 feet on the Newaukum roughly corresponds to Phase 2 flood in the Lewis County flood system.
Highest crests on record
- 205.59 ft — January 6, 2022
- 205.48 ft — February 8, 1996
- 205.36 ft — December 9, 2025
- 204.86 ft — March 1, 2022
- 204.62 ft — November 12, 2021
Recent crests: 202.55 ft (December 12, 2025) · 205.36 ft (December 9, 2025) · 204.02 ft (December 6, 2023) · 204.86 ft (March 1, 2022) · 205.59 ft (January 6, 2022)
Up and down the river, and nearby
- UpstreamSouth Fork Newaukum River near Onalaska, WA
- DownstreamChehalis River at WWTP at Chehalis, WA
- Chehalis River near Adna, WA
- North Fork Newaukum River near Forest, WA
- Skookumchuck River near Bucoda, WA
- Chehalis River near Grand Mound, WA
- South Fork Chehalis Rver near Wildwood, WA
- Chehalis River at Rochester, WA
Not an official source. River levels, forecasts, flood stages and impacts are from the National Weather Service (NEWW1); flow from the U.S. Geological Survey. Readings are provisional. In a flood, follow your local officials and the NWS at weather.gov.