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 - KLAMATH (KLMC1)
Latitude: 41.51º NLongitude: 123.98º WElevation: 6 Feet
Location: Del Norte County in CaliforniaBulletin Group: North CoastRiver Group: Klamath
Issuance Time: Apr 29 2025 at 7:36 AM PDTNext Issuance: Apr 30 2025 at 9:00 AM PDT
Action/Monitor: 30.0 FeetMinor Flood: 38.0 FeetModerate Flood: 42.0 FeetMajor Flood: 46.0 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*
142,000
31.13
Jan 14, 2024
2023*
139,000
30.86
Dec 31, 2022
2022*
53,800
20.30
Jan 8, 2022
2021*
76,300
23.67
Jan 13, 2021
2020*
88,300
25.19
Jan 26, 2020
 Historical High Stage/Flow Events (Period of Record - December 1861 to Present)** - Ranked by Flow
1965*
557,000
55.30
Dec 23, 1964
1974*
529,000
41.96
Jan 16, 1974
1986*
459,000
36.76
Feb 18, 1986
1861*
450,000
60.00
Dec -- 1861
1890*
425,000
63.00
Feb --, 1890
1956*
425,000
49.70
Dec 22, 1955
 * Discharge affected to unknown degree by regulation or diversion
 ** Most recent continuous record back to 1932 with segmented periods back to Dec 1861
Location Photographs
ESRI™ Locator Map
Flood Impacts
66.0 FeetExtensive and severe flooding can be expected from above Klamath Glen to the Pacific Ocean including the towns of Klamath and Klamath Glen and US Highway 101. The forecast level is over the top of the levee. Any persons living or working in areas protected by the levee should take appropriate action and move to higher ground.
65.5 FeetExtensive and severe flooding can be expected from above Klamath Glen to the Pacific Ocean including the towns of Klamath and Klamath Glen and US Highway 101. The forecast level is at the top of the levee. Any persons living or working in areas protected by the levee should take appropriate action and move to higher ground. High tides and strong, onshore winds amplify effects.
65.0 FeetSevere flooding is expected in the delta area, particularly US Highway 101 in the vicinity of Requa Road, the access road to Klamath Glen, and secondary roads. The forecast level is within 0.5 feet of top of levee. Any persons living or working in areas protected by the levee should take appropriate action and move to higher ground. High tides and strong onshore winds will amplify flooding effects.
64.0 FeetSevere flooding is the delta area is likely, particularly US Highway 101 in the vicinity of Requa Road, the access road to Klamath Glen, and secondary roads. The forecast level is within 1.5 feet of the top of the levee. Any persons living or working in areas protected by the levee should be prepared to take appropriate action and move to higher ground. High tides and strong onshore winds will amplify flooding effects.
63.0 FeetSevere flooding of the delta area below the levee. Most roads will be flooded and impassable, including US Highway 101 and numerous secondary roads. The forecast level is within 2.5 feet of the top of the levee protecting Klamath Glen. Any persons living or working in areas protected by the levee should be prepared to take appropriate action and move to higher ground. High tides and strong onshore winds will amplify flooding effects.
49.0 FeetExtensive flooding along the river from Blue Creek downstream to the Pacific Ocean. Most roads in the area, including US Highway 101, Requa Rd, and the access road to Klamath Glen are likely to be flooded and impassable.
46.0 FeetNumerous road closures are expected including US Highway 101 and secondary roads in the area. Significant flooding of many homes and businesses will occur. Loss of power is likely due to innundation of the transfer station.
42.0 FeetFlooding of Highway 101 near Requa Rd, the access road to Klamath Glen, and adjacent low lying secondary roads near the delta is likely. Flooding will be amplified if coincident with high tides and strong onshore winds.
40.0 FeetFlooding may occur on the access road to Klamath Glen and adjacent low lying secondary roads near the delta. Flooding will be amplified if coincident with high tides and strong, onshore winds.
38.0 FeetFlooding of lowest lying areas is likely.
34.0 FeetFlooding of lowest lying areas may occur.
Official 7 Day National Weather Service Forecast   (CAZ101)
Tonight: Mostly cloudy in the evening then clearing. Lows 41 to 51. North wind 5 to 15 mph.

Wednesday: Sunny. Highs 60 to 75. Northwest wind 5 to 15 mph.

Wednesday Night: Mostly clear. Lows 41 to 51. Northwest wind around 10 mph shifting to the northeast overnight.

Thursday: Sunny. Highs 59 to 70. Northwest wind around 5 mph.

Thursday Night: Partly cloudy. Areas of fog. Lows 41 to 51. West wind around 5 mph.

Friday: Mostly cloudy. Patchy fog. Chance of rain showers. Highs 55 to 65. Southwest wind around 5 mph.

Friday Night: Rain showers likely. Lows 40 to 50.

Saturday: Mostly cloudy. Chance of rain showers. Highs 51 to 61.

Saturday Night: Partly cloudy. Slight chance of rain showers. Lows 37 to 47.

Sunday through Monday: Mostly clear. Highs 57 to 71. Lows 37 to 47.

Monday Night and Tuesday: Partly cloudy. Lows 41 to 51. Highs 59 to 71.
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 Eureka 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.