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
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
ESRI™ Locator Map
Official 7 Day National Weather Service Forecast   (ORZ029)
rest of Tonight: Mostly cloudy. Patchy fog. Lows in the mid 20s to mid 30s. Light winds becoming north around 5 mph well after midnight.

Sunday: Mostly cloudy in the morning then clearing. Patchy fog in the morning. Highs in the mid 40s to lower 50s. North winds around 5 mph.

Sunday Night: Mostly clear. Patchy fog. Lows in the lower 20s to lower 30s. Northwest winds around 5 mph early in the evening becoming light, then becoming northeast around 5 mph after midnight.

Monday: Mostly cloudy. Patchy fog in the morning. Highs in the lower to mid 50s. East winds around 5 mph shifting to the southeast late in the afternoon.

Monday Night: Mostly cloudy. Lows in the mid 20s to mid 30s. Southeast winds 10 to 15 mph.

Tuesday: Mostly cloudy. Slight chance of rain in the afternoon. Highs in the mid 40s to lower 50s.

Tuesday Night: Mostly cloudy. Patchy fog. Lows in the mid 20s to lower 30s.

Wednesday: Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs around 50.

Wednesday Night: Partly cloudy. Slight chance of light freezing rain after midnight. Lows in the mid 20s to lower 30s.

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

Thursday Night: Partly cloudy. Slight chance of rain and light freezing rain after midnight. Lows in the mid 20s to lower 30s.

Friday: Mostly cloudy. Slight chance of rain, chance of light freezing rain and slight chance of snow in the morning. Highs in the mid 40s to mid 50s.

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