CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

WILLIAMSON RIVER - CHILOQUIN (WMSO3)

Latitude: 42.57º N	Longitude: 121.88º W	Elevation: 4149 Feet
Location: Klamath County in Oregon		Bulletin Group: North Coast		River Group: Klamath

Issuance Time:

Dec 25 2025 at 12:58 PM PST

Next Issuance:

Dec 26 2025 at 9:00 AM PST

Action/Monitor: 8.0 Feet

Minor Flood: 9.0 Feet

Moderate Flood: 10.0 Feet

Major Flood: 11.0 Feet

Plot Type:

Please Note:
1) Each individual timeseries plotted on the graphical river forecast can be toggled on and off by clicking the legend entry above. If the "Observed (Raw Data)" contains bad data and is toggled off, the plot will scale to the remaining timeseries.

2) At extremely low river flows, the "Observed (Raw Data)" may show readings below the lower end of the available rating table, while the "Observed (Simulated)" will only show values at the bottom of the rating table, creating a potential discrepancy between the two readings.

Observed Data Credit
	Raw streamflow data is provided by the US Geological Survey (USGS). View US Geological Survey (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

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.

Official 7 Day National Weather Service Forecast (ORZ029)

Tonight: Mostly cloudy. Chance of rain and snow showers early this evening, then rain and snow showers late this evening. Chance of rain and snow showers after midnight. Snow level 3800 feet. Snow accumulation of 2 to 3 inches. Lows in the mid 20s to lower 30s. South winds 10 to 15 mph. Gusts up to 35 mph this evening. Chance of precipitation 90 percent.

Friday: Mostly cloudy. Rain and snow showers likely. Snow level 3700 feet. Snow accumulation of 1 to 2 inches. Highs in the mid 30s to lower 40s. South winds 10 to 15 mph. Chance of precipitation 80 percent.

Friday Night: Mostly cloudy with a 50 percent chance of snow. Lows in the lower to mid 20s. West winds 10 to 15 mph.

Saturday: Mostly cloudy in the morning then becoming partly cloudy. A 10 percent chance of snow. Highs in the lower to mid 30s. West winds 5 to 10 mph.

Saturday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows 15 to 20. Northwest winds around 5 mph shifting to the northeast well after midnight.

Sunday and Sunday Night: Partly cloudy. Highs in the mid 30s to lower 40s. Lows 15 to 20.

Monday: Sunny. Highs in the lower to mid 40s.

Monday Night through Wednesday: Partly cloudy. Lows in the lower to mid 20s. Highs in the lower 40s to lower 50s.

Wednesday Night: Mostly cloudy. Lows in the mid 20s.

New Years Day: Mostly cloudy. Slight chance of snow in the morning, then chance of rain and snow in the afternoon. Highs in the lower to mid 40s.

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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