CNRFC - Hydrology - Observed River/Reservoir Conditions

WILLIAMSON RIVER - CHILOQUIN (WMSO3)

Latitude: 42.57º N	Longitude: 121.88º W	Elevation: 4149 Feet
Location: Klamath County in Oregon		River Group: North Coast

Monitor Stage: 8.0 Feet

Flood Stage: 9.0 Feet

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View USGS Data for this station location.

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	4,960	7.18	Apr 1, 2025
2024	1,860	5.01	Apr 21, 2024
2023	3,630	6.32	Apr 16, 2023
2022	1,040	4.16	Jan 9, 2022
2021	670	3.68	Apr 28, 2021
Historical High Stage/Flow Events (Period of Record - April 1917 to Present) - Ranked by Flow
1997	17,100	10.27	Jan 5, 1997
1964	16,100	10.56	Feb 26, 1964
1982	10,200	8.45	Feb 24, 1982
1970	8,010	7.53	Feb 27, 1970
1943	7,660	7.29	Apr 1, 1943
1938	7,620	7.27	Apr 22, 1938

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (ORZ029)

Today: Partly cloudy until early afternoon then becoming mostly cloudy. Slight chance of rain early This Afternoon. Slight chance of thunderstorms late This Afternoon. Highs in the lower 80s to lower 90s. Light winds becoming south 5 to 10 mph in the late morning and early afternoon, then shifting to the southwest late This Afternoon.

Tonight: Mostly cloudy with a slight chance of rain and thunderstorms in the evening, then partly cloudy with a slight chance of rain after midnight. Lows in the lower to mid 50s. West winds 5 to 10 mph shifting to the north late in the evening and overnight. Chance of precipitation 20 percent.

Wednesday: Sunny. Slight chance of thunderstorms in the afternoon. Highs in the lower to mid 80s. Northeast winds around 5 mph shifting to the east late in the morning, then shifting to the southwest in the afternoon.

Wednesday Night: Mostly clear. Lows in the mid 40s to mid 50s. Northwest winds 10 to 15 mph decreasing to around 5 mph well after midnight.

Thursday: Sunny. Highs in the mid 70s to mid 80s. Northwest winds around 5 mph shifting to the southwest 10 to 15 mph in the late morning and afternoon.

Thursday Night and Friday: Clear. Lows in the mid 40s to lower 50s. Highs in the mid 70s to mid 80s.

Friday Night through Saturday Night: Mostly clear. Lows in the mid 40s to mid 50s. Highs in the lower 80s to lower 90s.

Sunday: Sunny. Slight chance of rain in the morning. Highs in the mid 80s to lower 90s.

Sunday Night and Monday: Partly cloudy. Lows in the lower 50s to lower 60s. Highs in the mid 80s to lower 90s.

Flood Impacts
10.0 Feet	Widespread flooding is occurring along the Williamson River from the Highway 97 bridge downstream to Upper Klamath Lake. Widespread farm land flooding is occurring. Numerous structures are flooded.
9.0 Feet	The Williamson River is at flood stage. Water exceeds the channel of the river and begins to impact structures along the river and in low-lying areas near the river.
8.0 Feet	The Williamson River is near bankfull stage. Water is nearing many structures along and enar the river. Water is close to structures at the Water Wheel Campground near Highway 97.

Product Disclaimer

This river graphic is not intended to serve as a substitute for official flood watches, warnings, advisories, or statements issued by the NWS Medford Weather Forecast Office. Observations are preliminary and subject to change. River levels identified as "forecast" should be consistent with those contained in official NWS products. River levels identified as "guidance" have significant uncertainty due to future weather or reservoir regulation and are provided for planning purposes only.

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