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:

May 04 2025 at 10:00 AM PDT

Next Issuance:

May 05 2025 at 9:00 AM PDT

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
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
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
2020	1,120	4.26	Jan 29, 2020
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

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: Clear. Lows in the lower to mid 30s. Breezy. North winds 15 to 25 mph decreasing to 10 to 15 mph after midnight.

Monday: Sunny. Highs in the lower 60s to lower 70s. North winds 10 to 20 mph.

Monday Night: Mostly clear. Lows in the lower 30s to lower 40s. North winds 10 to 20 mph decreasing to 5 to 10 mph well after midnight.

Tuesday: Sunny. Highs in the lower to mid 70s. Northeast winds 5 to 10 mph.

Tuesday Night: Clear. Lows in the lower to mid 40s. North winds around 5 mph shifting to the northwest late in the evening and overnight.

Wednesday through Thursday: Mostly clear. Highs in the lower to mid 70s. Lows in the lower to mid 40s.

Thursday Night: Clear. Lows in the lower to mid 40s.

Friday and Friday Night: Mostly clear. Highs in the mid 70s to lower 80s. Lows in the lower to mid 40s.

Saturday and Saturday Night: Partly cloudy. Highs in the mid 70s to lower 80s. Lows in the lower to mid 40s.

Sunday: Partly cloudy. Slight chance of rain in the afternoon. Highs in the mid 60s to mid 70s.

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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