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

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KLAMATH RIVER - SEIAD VALLEY (SEIC1)
Latitude: 41.85º NLongitude: 123.23º WElevation: 1320 Feet
Location: Siskiyou County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Jan 01 2026 at 8:57 AM PSTNext Issuance: Jan 02 2026 at 9:00 AM PST
Action/Monitor: 13.0 FeetMinor Flood: 15.0 FeetModerate Flood: 20.0 FeetMajor Flood: 28.0 Feet

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
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Raw streamflow data is provided by the US Geological Survey (USGS).
View US Geological Survey (USGS) Data for this station location.

Verification - Historical Graphical RVF
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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*
21,100
12.50
Dec 29, 2024
2024*
10,400***
8.61
Jan 28, 2024
2023*
9,370
8.15
Apr 30, 2023
2022*
5,130
5.79
Apr 16, 2022
2021*
4,860
5.61
Jan 13, 2021
 Historical High Stage/Flow Events (Period of Record - Jul 1951 to Present)** - Ranked by Flow
1965*
165,000
33.75
Dec 23, 1964
1974*
126,000
29.65
Jan 16, 1974
1956*
122,000
29.20
Dec 22, 1955
1997* 117,000 28.72 Jan 1, 1997
2006* 74,000 23.17 Dec 31, 2005
1982* 71,500 22.80 Dec 20, 1981
* Discharge affected by regulation or diversion
** Most recent continuous record back to Jul 1951 with segmented periods back to Oct 1912
*** Estimated
Location Photographs
ESRI™ Locator Map
Flood Impacts
33.75 FeetMajor flooding is occurring along the entire reach of the Klamath River in Siskiyou County. Much of Highway 96 is impassable.
28.0 FeetExpect considerable flooding along the Klamath River in Siskiyou County. Sections of Highway 96 are flooded.
20.0 FeetHighway 96 innundated in low-lying spots along the Klamath River in Siskiyou County. Flooding is also likely at the confluence with the Scott River and the confluence with Indian Creek.
15.0 FeetThe Klamath River is at flood stage. The Klamath River begins to flow out of its banks in some areas. Some low-lying structures may be flooded.
13.0 FeetThe Klamath River is nearing bankfull.
Official 7 Day National Weather Service Forecast   (CAZ080)
Tonight: Mostly cloudy. Chance of rain early this evening, then rain likely late this evening. Chance of rain after midnight. Snow level 7000 feet. Lows in the mid 30s to mid 40s. South winds 10 to 15 mph. Chance of rain 60 percent.

Friday: Mostly cloudy. Chance of rain in the morning, then chance of rain and snow in the afternoon. Snow may be heavy at times in the afternoon. Snow level 6500 feet lowering to 6000 feet in the afternoon. Highs in the lower 40s to lower 50s. Southeast winds 10 to 20 mph. Gusts up to 35 mph in the afternoon. Chance of precipitation 30 percent.

Friday Night: Rain and snow. Snow may be heavy at times. Snow level 6000 feet lowering to 5500 feet after midnight. Snow accumulation of 1 to 2 inches. Lows in the mid 30s to lower 40s. Breezy. Southeast winds 15 to 25 mph. Chance of precipitation near 100 percent.

Saturday: Rain and snow. Snow may be heavy at times in the afternoon. Snow level 5500 feet. Highs in the lower 40s to lower 50s. Breezy. South winds 15 to 25 mph. Chance of precipitation near 100 percent.

Saturday Night: Rain and snow. Snow may be heavy at times. Snow level 5000 feet lowering to 4500 feet after midnight. Lows in the lower 30s to lower 40s. Breezy. South winds 15 to 25 mph. Chance of precipitation near 100 percent.

Sunday: Rain and snow. Snow may be heavy at times in the morning. Highs in the mid 30s to mid 40s.

Sunday Night: Rain and snow. Lows in the lower to mid 30s.

Monday: Rain and snow in the morning, then chance of rain and snow in the afternoon. Highs in the mid 30s to mid 40s.

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

Tuesday: Mostly cloudy with a chance of rain and snow. Highs in the mid 30s to mid 40s.

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

Wednesday and Wednesday Night: Mostly cloudy with rain and snow likely. Highs in the mid 30s to mid 40s. Lows in the mid 20s to mid 30s.

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