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: Rain and snow This Morning, then rain and snow likely This Afternoon. Snow level 6000 feet lowering to 5500 feet This Afternoon. Little or no snow accumulation. Highs in the lower to mid 40s. South winds 10 to 20 mph shifting to the southwest 5 to 10 mph late This Afternoon. Chance of precipitation 80 percent.

Tonight: Mostly cloudy in the evening then becoming partly cloudy. A 10 percent chance of rain and snow. Patchy fog. Snow level 4600 feet in the evening. Lows in the lower to mid 30s. Southwest winds 5 to 10 mph.

Monday: Patchy fog in the morning. Mostly cloudy in the morning, then partly cloudy with a 10 percent chance of rain in the afternoon. Highs in the lower to mid 40s. West winds 5 to 10 mph.

Monday Night: Partly cloudy. Lows 15 to 25. West winds around 5 mph shifting to the southwest well after midnight.

Tuesday: Partly cloudy. Highs around 40. South winds 5 to 10 mph.

Tuesday Night: Mostly cloudy. Chance of snow in the evening, then snow likely after midnight. Lows in the mid 20s to lower 30s.

Wednesday: Mostly cloudy. Rain and snow in the morning, then rain and snow likely in the afternoon. Highs in the mid 30s to lower 40s.

Wednesday Night: Mostly cloudy. Rain and snow likely in the evening, then chance of rain and snow after midnight. Lows in the lower 20s to lower 30s.

Thursday: Mostly cloudy with a chance of rain and snow. Highs in the mid 30s to lower 40s.

Thursday Night: Mostly cloudy. Slight chance of rain and snow in the evening. Lows in the lower to mid 20s.

Friday: Mostly cloudy. Highs in the mid 30s to lower 40s.

Friday Night: Mostly cloudy. Slight chance of snow after midnight. Lows 15 to 25.

Saturday: Mostly cloudy. Slight chance of snow in the morning, then chance of rain and snow in the afternoon. Highs around 40.

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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