National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service

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WILLIAMSON RIVER - CHILOQUIN (WMSO3)
Latitude: 42.57º NLongitude: 121.88º WElevation: 4149 Feet
Location: Klamath County in OregonRiver Group: North Coast
Monitor Stage: 8.0 FeetFlood Stage: 9.0 Feet

Observed Data Credit
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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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (ORZ029)
Today: Partly cloudy This Morning then clearing. Patchy freezing fog early This Morning. Highs in the lower to mid 30s. West winds 5 to 10 mph.

Tonight: Partly cloudy. Patchy fog through the night. Widespread freezing fog after midnight. Lows 15 to 20. North winds 5 to 10 mph.

Sunday: Sunny. Widespread freezing fog in the morning. Highs in the mid 30s to lower 40s. Northeast winds around 5 mph.

Sunday Night: Partly cloudy. Lows 15 to 25. Northeast winds around 5 mph.

Monday: Partly cloudy in the morning then clearing. Highs in the lower to mid 40s. East winds around 5 mph.

Monday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the lower to mid 20s.

Tuesday: Partly cloudy. Highs in the mid 40s to lower 50s.

Tuesday Night and Wednesday: Mostly clear. Lows in the lower to mid 20s. Highs in the mid 40s to lower 50s.

Wednesday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 20s to lower 30s.

New Years Day: Partly cloudy in the morning then becoming mostly cloudy. Chance of rain and snow. Highs in the lower 40s to lower 50s.

Thursday Night: Mostly cloudy with a chance of rain and snow. Lows in the mid 20s to lower 30s.

Friday: Mostly cloudy with a chance of snow. Highs in the lower to mid 40s.
Flood Impacts
10.0 FeetWidespread 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 FeetThe 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 FeetThe 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.