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

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CLEAR LAKE - LAKEPORT (CLKC1)
Latitude: 39.04º NLongitude: 122.91º WElevation: 1318 Feet
Location: Lake County in CaliforniaBulletin Group: Lower SacramentoRiver Group: Cache Putah
Issuance Time: Jul 01 2025 at 7:36 AM PDTNext Issuance: Jul 02 2025 at 9:00 AM PDT
Action/Monitor: 8.0 FeetMinor Flood: 9.0 FeetModerate Flood: 11.9 FeetMajor Flood: 12.0 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 Storage (Ac-ft)
Stage (feet)
Date
 Most Recent 5 Years
2024*
352,800
8.42
Feb 23, 2024
2023*
344,400
8.23
Mar 22, 2023
2022*
7,360
0.55
Feb 13, 2022
2021*
49,100
1.23
Mar 24, 2016
2020*
191,900
4.70
Apr 16, 2020
 Historical High Stage/Flow Events (Period of Record - Oct 1984 to Present)**
1998
--
11.44
Feb 24, 1998
1986
480,900
11.34
Feb 2, 1986
1983
485,400
11.34
Jan 3, 1983
1914 471,800 11.09 Jan 28, 1914
* Data for the most recent 5 years utilizes mean daily values rather than instantaneous values
** Most recent continuous record back to Oct 1984 with segmented periods back to 1874
Location Photographs
ESRI™ Locator Map
Flood Impacts
11.0 FeetMajor flooding occurs all around the north end of the lake, especially in Lakeport and Clearlake Oaks. Highway 20 around the north end of the lake is closed in some areas.
9.0 FeetLow lying structures and some main roads around the lake are threatened by the high lake levels.
8.5 FeetMinor flooding of some lake side residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8.5 FeetMinor flooding of some lakeside residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8.0 FeetMinor flooding of some lakeside residents occurs.
Official 7 Day National Weather Service Forecast   (CAZ115)
Tonight: Mostly clear. Lows 61 to 71.

Wednesday: Sunny. Highs 87 to 100.

Wednesday Night: Mostly clear. Lows 58 to 68.

Thursday: Mostly sunny. Highs 79 to 94.

Thursday Night: Mostly clear. Lows 51 to 61.

Independence Day: Sunny. Highs 76 to 89.

Friday Night through Monday: Clear. Lows 54 to 64. Highs 81 to 96.

Monday Night and Tuesday: Mostly clear. Lows 55 to 65. Highs 82 to 96.
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.