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 then becoming mostly cloudy late This Morning then becoming partly cloudy. Patchy blowing dust This Afternoon. Slight chance of rain late This Afternoon. Highs in the lower to mid 70s. Breezy. South winds 5 to 10 mph increasing to southwest 15 to 25 mph in the late morning and afternoon.

Tonight: Mostly cloudy. Patchy blowing dust in the evening. Chance of rain in the evening, then slight chance of rain and snow after midnight. Snow level 6000 feet in the evening. Lows in the lower 30s to lower 40s. West winds 10 to 20 mph with gusts to around 35 mph decreasing to 5 to 10 mph after midnight. Chance of precipitation 30 percent.

Tuesday: Mostly cloudy. Slight chance of snow in the morning, then chance of rain showers, snow and slight chance of thunderstorms in the afternoon. Snow level 5500 feet in the afternoon. Highs in the lower to mid 50s. West winds 10 to 15 mph. Chance of precipitation 30 percent.

Tuesday Night: Partly cloudy. A 20 percent chance of rain in the evening. Snow level 6000 feet in the evening. Lows in the lower to mid 30s. Northwest winds 10 to 20 mph.

Wednesday: Mostly cloudy. Chance of rain and snow in the morning, then chance of rain in the afternoon. Snow level 5500 feet rising to 6500 feet in the afternoon. Highs in the mid 50s to lower 60s. Northwest winds 5 to 10 mph shifting to the north 10 to 20 mph in the late morning and afternoon. Chance of precipitation 40 percent.

Wednesday Night: Mostly cloudy with a chance of rain. Lows in the mid 30s to lower 40s.

Thursday and Thursday Night: Mostly cloudy with showers likely and chance of thunderstorms. Highs in the mid 60s to lower 70s. Lows in the mid 30s to mid 40s.

Friday: Mostly cloudy. Slight chance of rain in the morning, then slight chance of thunderstorms in the afternoon. Highs in the lower to mid 60s.

Friday Night: Partly cloudy. Lows in the mid 30s to lower 40s.

Saturday: Partly cloudy in the morning, then sunny with a slight chance of rain in the afternoon. Highs in the mid 60s to lower 70s.

Saturday Night: Mostly clear with a slight chance of rain. Lows in the lower 30s to lower 40s.

Sunday: Sunny. Highs in the mid 60s to lower 70s.

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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