CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

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

Issuance Time:

Jul 02 2025 at 8:22 AM PDT

Next Issuance:

Jul 03 2025 at 9:00 AM PDT

Action/Monitor: 8.0 Feet

Minor Flood: 9.0 Feet

Moderate Flood: 11.9 Feet

Major Flood: 12.0 Feet

Plot Type:

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

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
Upstream Photo	Gage House Photo	Downstream 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 clear. Lows 58 to 68.

Thursday: Partly cloudy in the morning then becoming mostly cloudy. Highs 78 to 93.

Thursday Night: Mostly clear. Lows 50 to 60. West wind around 20 mph in the evening.

Independence Day: Sunny. Highs 73 to 87.

Friday Night and Saturday: Clear. Lows 50 to 60. Highs 78 to 93.

Saturday Night through Wednesday: Clear. Lows 56 to 66. Highs 84 to 99.

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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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.