CNRFC - Hydrology - River Guidance - Graphical RVF

*** IMPORTANT *** Week of June 16 - Website Data Outage - Due to a major computer upgrade the week of June 16, nearly all data on the CNRFC web site will not be updated. We anticipate the down time to be approximately 4 days. The latest deterministic hydrologic forecasts for official forecast points will continue to be available at the National Water Prediction Service during this time.

Location:

RUSSIAN RIVER - HOPLAND (HOPC1)

Latitude: 39.03º N	Longitude: 123.13º W	Elevation: 498 Feet
Location: Mendocino County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Jun 14 2025 at 7:33 AM PDT

Next Issuance:

Jun 15 2025 at 9:00 AM PDT

Action/Monitor: N/A

Minor Flood: 15.0 Feet

Moderate Flood: 23.0 Feet

Major Flood: 26.0 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 Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2024*	11,400	18.32	Feb 5, 2024
2023*	11,800	18.64	Dec 31, 2022
2022*	10,200	16.65	Oct 24, 2021
2021*	948	4.36	Feb 2, 2021
2020*	2,740	8.20	Jan 16, 2020
Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1956	45,000	27.00	Dec 22, 1955
1965*	41,500	26.01	Dec 22, 1964
1974*	39,700	25.50	Jan 16, 1974
2006*	35,600	26.81	Dec 31, 2005
1986*	32,900	22.96	Feb 17, 1986
* Discharge affected by regulation or diversion

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
30.0 Feet	Disastrous flooding. Many homes and businesses damaged. Numerous primary and secondary roads and some bridges could be washed out. This is equal to the highest known stage, which occurred in December 1937. 6500 acres were inundated by flood waters.
28.0 Feet	Disastrous flooding will occur. Many homes and businesses could be damaged. Many primary and secondary roads and some bridges could be washed out.
27.0 Feet	Widespread major flooding. At the forecast level, over 500 homes and farm buildings were damaged on December 22, 1955. 6300 acres of land were inundated by flood waters. All persons in the areas area urged to move to high ground and take appropriate action to protect life and property.
26.0 Feet	Widespread major flooding will occur. Primary roads and some bridges will flood.
25.0 Feet	Severe bank erosion is likely with widespread flooding of farmland, buildings, and low-lying homes in the Hopland, Ukiah, and Talmage areas. Many secondary roads will be flooded. This level of flooding caused 6100 acres to flood in February 1940.
24.0 Feet	Flooding of low-lying stuctures and farmland in the Hopland, Ukiah, and Talmage ares. Many secondary roads may also be flooded. Severe bank erosion is possible.
23.0 Feet	Flooding of farmland, buildings, and low-lying homes in the Hopland area. Flooding will begin in the Ukiah and Talmage areas.
21.0 Feet	Flooding of low-lying structures just west of the railroad tracks near Hopland.
20.0 Feet	Flooding of low-lying structures east of the railroad tracks near Hopland.
18.0 Feet	Flooding of Highway 222 near Ukiah. Secondary roads in low-lying areas will be flooded in the Hopland, Ukiah, and Talmage areas.
17.0 Feet	Significant flooding of Highway 175 at the approaches to the Russian River bridge. Minor flooding of Highway 222 near Ukiah, and in crop land along the left and right banks of the Russian River near Hopland.
15.0 Feet	Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect flooding of cropland on the right bank of river.

Official 7 Day National Weather Service Forecast (CAZ113)

Today: Mostly cloudy in the morning then clearing. Highs 75 to 90.

Tonight: Partly cloudy. Lows 44 to 54.

Monday: Sunny. Highs 68 to 83.

Monday Night: Clear. Lows 46 to 56. Northwest wind around 20 mph.

Tuesday: Sunny. Highs 74 to 89.

Tuesday Night and Wednesday: Clear. Lows 51 to 61. Highs 78 to 93.

Wednesday Night and juneteenth: Mostly clear. Lows 47 to 57. Highs 78 to 93.

Thursday Night: Clear. Lows 44 to 54.

Friday: Sunny. Highs 64 to 79.

Friday Night and Saturday: Clear. Lows 43 to 53. Highs 66 to 81.

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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