Rivermatics

USGS Streamgage 12020000

Chehalis River near Doty, WA

Chehalis River near Doty, WA is USGS streamgage 12020000 in Washington, monitoring river discharge in hydrologic subbasin 17100103. It sits on the Chehalis River, alongside 6 other gauges Rivermatics tracks on the same river. It drains a watershed of about 113 square miles. Discharge records at this site go back to 1939. Typical flow runs near 59.2 cfs in July and 432.8 cfs in April, with the higher of the two arriving in April. Rivermatics issues a daily machine-learned flow outlook for this gauge, reaching 14 days ahead.

View live conditions & forecast →

Gauge details

State
Washington
Drainage area
113 sq mi
Gauge elevation
307 ft
Subbasin (HUC-8)
17100103
Coordinates
46.61732, -123.27764
USGS site number
12020000
Records begin
1939-10-01 (87 years)
Rivermatics forecast
14-day flow outlook

14-day flow forecast

Based on observations through for Chehalis River near Doty, WA. Each day carries a median estimate and the band the model expects the flow to fall within — not a single number to plan against. Forecasts are re-issued daily; see the live screen for the current outlook.

Forecast daily mean discharge in cubic feet per second, by date
Date Low p10 Expected p50 High p90 Range
22.6 23.8 25
21.6 23.1 24.9
22.9 26.7 37.8
22.8 27.4 42.8
21.5 25 34
20.1 23 28.9
19.2 21.8 26
18.6 21 24.6
18.1 20.5 24
17.7 20.1 23.4
17.3 19.7 22.7
16.8 19.3 22.3
16.3 18.8 21.9
15.9 18.5 21.6

All values in cubic feet per second (cfs). Estimates only — do not use them for navigation or for any safety, rescue, or emergency decision.

Typical flow by month

Long-term daily discharge percentiles from the USGS record (up to 87 years of data), averaged within each month. These describe the historical normal range — they are not a forecast and not today's reading.

Historical monthly discharge percentiles in cubic feet per second
Month Low p10 Typical p50 High p90 Range
January 276.5 796.7 2,919.4
February 284.8 700 2,399.7
March 269 634.8 1,824.8
April 219.7 432.8 1,080.4
May 121.3 210.8 504.2
June 68.3 114.8 263.5
July 37.2 59.2 101.3
August 23.6 35.7 66.7
September 22.1 36.2 156.5
October 31.1 122.7 691.6
November 136.3 570.6 2,224
December 271 823.6 2,804.2

All values in cubic feet per second (cfs).

Common questions

When does Chehalis River near Doty, WA normally run highest?
December, on the long-term record. The median daily flow that month is about 823.6 cfs, against 35.7 cfs in August, the lowest month. These are historical normals for the date, not a forecast and not today's reading.
What is a normal flow for Chehalis River near Doty, WA?
It depends on the month. In January, half of days historically fall near 796.7 cfs, with the middle 80% of days between 276.5 and 2,919.4 cfs. The month-by-month table on this page gives the full range.
How long has Chehalis River near Doty, WA been measured?
Discharge records at USGS site 12020000 begin in 1939, about 87 years, covering roughly 9,200 days of published daily values. The long record is what makes the monthly percentiles on this page meaningful.
Is there a flow forecast for Chehalis River near Doty, WA?
Yes. Rivermatics trains a machine-learned model — a temporal-fusion transformer — on this basin's observed flows, weather, and snowpack, and issues a daily flow outlook reaching 14 days ahead: a median estimate inside a confidence band, not a single number to bet on. Every forecast is scored against days the model never trained on, and that track record is published on the live gauge screen. Open live conditions to see the current outlook.
Where is Chehalis River near Doty, WA?
The gauge sits at 46.61732, -123.27764, in Washington, in hydrologic subbasin 17100103, at an elevation of about 307 feet, draining roughly 113 square miles.
Can I use Chehalis River near Doty, WA data for flood or safety decisions?
No. Rivermatics provides estimates, not guarantees, and the readings and forecasts here may be delayed, inaccurate, or wrong. Do not use them for navigation or for any safety, rescue, or emergency decision. Check the National Weather Service and USGS directly, and use your own judgment.

Upstream and downstream on the Chehalis River

Every gauge Rivermatics tracks on this river, ordered by drainage area — upstream first. See the Chehalis River in full.

Other gauges in this subbasin