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: Cloudy. Rain through the day. Slight chance of snow This Afternoon. Snow level 6500 feet lowering to 5500 feet This Afternoon. No snow accumulation. Highs in the mid 40s to lower 50s. Windy. South winds 20 to 30 mph with gusts to around 45 mph decreasing to 15 to 20 mph late This Afternoon. Chance of precipitation 90 percent.

Tonight: Mostly cloudy with a 30 percent chance of rain and snow. Snow level 5000 feet. Lows in the mid 20s to lower 30s. South winds 10 to 15 mph.

Saturday: Mostly cloudy. A 30 percent chance of rain and snow in the morning. Snow level 5500 feet in the morning. Highs in the lower 40s to lower 50s. South winds 10 to 15 mph.

Saturday Night: Mostly cloudy. Chance of rain in the evening, then rain after midnight. Lows in the mid 20s to mid 30s. South winds 10 to 20 mph.

Sunday: Rain. Snow level 6500 feet lowering to 6000 feet in the afternoon. Highs in the lower to mid 40s. South winds 10 to 15 mph. Chance of rain 90 percent.

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

Monday: Mostly cloudy. Slight chance of rain and snow in the morning, then slight chance of snow in the afternoon. Highs in the mid 30s to lower 40s.

Monday Night: Partly cloudy. Lows in the lower to mid 20s.

Tuesday: Partly cloudy in the morning, then mostly cloudy with a slight chance of snow in the afternoon. Highs in the mid 30s to lower 40s.

Tuesday Night: Partly cloudy with a slight chance of snow in the evening, then mostly cloudy with snow likely after midnight. Lows in the lower to mid 20s.

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

Wednesday Night: Mostly cloudy with a chance of snow. Lows in the lower to mid 20s.

Thursday: Mostly cloudy. Slight chance of snow in the morning, then slight chance of rain and snow in the afternoon. Highs in the mid 30s to lower 40s.

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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