Chehalis River near Doty

1. 324.50 ftdeep and hazardous flood waters of the upper Chehalis and South Fork Chehalis rivers will inundate most roads and a majority of agricultural and residential areas. Many bridges will be closed and possibly damaged. This stage roughly corresponds to Phase 4 in the Lewis County flood system. Flooding will occur all along the river including headwaters...tributaries...and other streams within and near the upper Chehalis River Basin.
2. 323.50 ftdeep and hazardous flood waters of the upper Chehalis and South Fork Chehalis Rivers will inundate many residential and commercial areas and roadways including Hwy. 6...potentially closing schools. Other impacted roadways and surrounding areas include Curtis Hill...Lake Creek...Moon Hill...Wildwood...Beaver Creek...and King Roads in the Boisfort Valley and Labri Rd. and Front St. below Doty. This stage roughly corresponds to Phase 3 in the Lewis County flood system.
3. 318.00 ftflood waters of the upper Chehalis and South Fork Chehalis will inundate many roads and some residential and commercial areas. Impacted roadways and surrounding areas include Curtis Hill...Lake Creek...Moon Hill...Wildwood Roads in the Boisfort Valley and Labri Rd. and Front St. below Doty. This stage roughly corresponds to just below Phase 2 in the Lewis County flood system.
4. 316.50 ftflood waters of the upper Chehalis and South Fork Chehalis will spill over its banks...inundating low flood prone areas and possibly some roads below Doty and in the Boisfort Valley. This stage roughly corresponds to Phase 1 in the Lewis County flood system.

Chance of flooding, September to November

The three-month chances are the River Forecast Centers’ long-range flood outlook, issued September 20, 2026.

Most recent crests

• December 9, 2025: 318.47 ft
• December 5, 2023: 318.46 ft
• February 28, 2022: 318.11 ft
• January 6, 2022: 321.11 ft
• January 13, 2021: 318.55 ft
• January 3, 2021: 318.28 ft
• December 20, 2019: 319.66 ft
• February 9, 2017: 14.32 ft
• November 17, 2015: 14.42 ft
• February 6, 2015: 11.26 ft

• UpstreamChehalis River at Pe Ell
• DownstreamChehalis River at Adna
• Elk Creek (WA) at Doty
• South Fork Chehalis Rver at Curtis
• Stearns Creek at Claquato
• Chehalis River at WWTP at Chehalis
• South Fork Chehalis Rver at Wildwood
• Chehalis River at Rochester

Forecasts by the Northwest River Forecast Center. Forecasts are issued routinely year-round. River forecasts for this location take into account past and future precipitation. The stages/flows that will occur may be different if future rainfall is different than forecast.

Stage, flood stages, impacts and crest history from NOAA’s National Water Prediction Service. Streamflow and the daily record from the U.S. Geological Survey.