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: May 01 2025 at 8:26 AM PDTNext Issuance: May 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)
Today: Sunny. Highs 75 to 86.

Tonight: Clear. Lows 46 to 56.

Friday: Sunny. Highs 67 to 79.

Friday Night: Mostly cloudy. Lows 43 to 53. West wind around 20 mph.

Saturday: Partly cloudy. Slight chance of rain. Highs 55 to 67. Northwest wind around 20 mph with gusts at higher elevations to around 35 mph.

Saturday Night: Partly cloudy. Slight chance of rain. Lows 39 to 49.

Sunday: Sunny. Highs 66 to 76.

Sunday Night and Monday: Clear. Lows 47 to 57. Highs 69 to 84.

Monday Night: Mostly clear. Lows 49 to 59.

Tuesday: Sunny. Highs 74 to 85.

Tuesday Night and Wednesday: Mostly clear. Lows 47 to 57. Highs 72 to 85.
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.