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: May 03 2025 at 9:58 AM PDTNext Issuance: May 04 2025 at 9:00 AM PDT
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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To view other verification locations, use our Historical Graphical River Forecast Interface.
Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
Date
 Most Recent 5 Years
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
2020*
7,270
7.08
Apr 24, 2020
 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
* 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)
Today: Mostly cloudy. Chance of rain showers until early afternoon. Chance of snow showers late this morning. Snow level 5500 feet this morning. Highs in the mid 40s to mid 50s. Northwest winds 10 to 15 mph. Chance of precipitation 30 percent.

Tonight: Mostly cloudy in the evening then clearing. Lows in the lower to mid 30s. North winds 10 to 20 mph.

Sunday: Sunny. Highs in the mid 50s to mid 60s. Breezy. North winds 15 to 25 mph.

Sunday Night: Clear. Lows in the mid 30s to lower 40s. Breezy. North winds 15 to 25 mph.

Monday: Sunny. Highs in the mid 60s to mid 70s. Northeast winds 10 to 20 mph.

Monday Night through Wednesday: Clear. Lows in the lower 40s to lower 50s. Highs in the lower 70s to lower 80s.

Wednesday Night through Thursday Night: Mostly clear. Lows in the mid 40s to lower 50s. Highs in the lower 70s to lower 80s.

Friday: Sunny. Highs in the lower 70s to lower 80s.
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.