CNRFC - Hydrology - Observed River/Reservoir Conditions

CLEAR LAKE - LAKEPORT (CLKC1)

Latitude: 39.04º N	Longitude: 122.91º W	Elevation: 1318 Feet
Location: Lake County in California		Bulletin Group: Lower Sacramento		River Group: Cache Putah

Action/Monitor: 8.0 Feet

Minor Flood: 9.0 Feet

Moderate Flood: 11.9 Feet

Major Flood: 12.0 Feet

Plot Type:

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

Historical Mean Daily Stage/Storage Data
Water Year	Peak Storage (Ac-ft)	Stage (feet)	Date
Most Recent 5 Years
2025*	349,706	8.35	Feb 16, 2025
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, 2021
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
Left of Gage Photo	Gage House Photo	Right of Gage Photo

ESRI™ Locator Map

Flood Impacts
11.0 Feet	Major 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 Feet	Low lying structures and some main roads around the lake are threatened by the high lake levels.
8.5 Feet	Minor flooding of some lake side residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8.5 Feet	Minor flooding of some lakeside residents occurs. More buildings are threatened from Lakeport to Clearlake Oaks.
8.0 Feet	Minor flooding of some lakeside residents occurs.

Official 7 Day National Weather Service Forecast (CAZ115)

Tonight: Mostly cloudy until late Tonight then becoming partly cloudy. Slight chance of rain showers in the evening. Patchy valley fog overnight. Lows 37 to 47. Northeast wind around 20 mph in the evening.

Tuesday: Sunny. Patchy valley fog in the morning. Highs 54 to 64.

Tuesday Night: Partly cloudy. Patchy valley fog. Lows 36 to 46.

Wednesday: Mostly cloudy. Patchy valley fog. Highs 48 to 58.

Wednesday Night: Cloudy. Rain likely. Lows 39 to 49.

Thursday: Mostly cloudy. Rain likely. Highs 47 to 57.

Thursday Night: Mostly cloudy in the evening then becoming partly cloudy. Slight chance of rain. Lows 37 to 47.

Friday: Partly cloudy in the morning then clearing. Highs 55 to 65.

Friday Night and Saturday: Mostly clear. Lows 38 to 48. Highs 55 to 67.

Saturday Night through Sunday Night: Partly cloudy. Lows 39 to 49. Highs 57 to 67.

Monday: Partly cloudy. Slight chance of rain. Highs 55 to 65.

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.

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