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
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	4,950	7.17	Apr 01, 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)

Tonight: Partly cloudy early This Evening then clearing. Lows in the lower to mid 30s. West winds 10 to 15 mph shifting to the south around 5 mph after midnight.

Sunday: Partly cloudy. Highs in the mid 50s to mid 60s. South winds 5 to 10 mph shifting to the southwest 10 to 20 mph in the afternoon.

Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the lower to mid 30s. West winds 15 to 20 mph decreasing to 5 to 10 mph late in the evening and overnight.

Monday: Mostly cloudy with a 20 percent chance of rain and snow. Snow level 4800 feet. Highs in the lower 50s to lower 60s. Northwest winds around 5 mph.

Monday Night: Mostly cloudy with a 20 percent chance of rain in the evening, then partly cloudy after midnight. Snow level 6000 feet in the evening. Lows in the lower 30s to lower 40s. Northwest winds around 5 mph shifting to the east after midnight.

Tuesday: Mostly cloudy. Chance of rain and slight chance of thunderstorms in the afternoon. Highs in the mid 50s to lower 60s.

Tuesday Night: Mostly cloudy. Chance of rain in the evening, then chance of rain and snow after midnight. Lows in the mid 30s to lower 40s.

Wednesday and Wednesday Night: Rain and snow. Breezy, cooler. Highs in the mid 40s to lower 50s. Lows in the lower 30s to lower 40s.

Thursday: Snow, breezy. Highs in the lower to mid 40s.

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

Friday: Partly cloudy. Slight chance of snow in the morning, then slight chance of rain and snow in the afternoon. Not as cool. Highs in the lower to mid 50s.

Friday Night and Saturday: Clear. Lows in the mid 20s to lower 30s. Highs in the mid 50s to mid 60s.

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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