CNRFC - Hydrology - River Guidance - Graphical RVF

RUSSIAN RIVER - HOPLAND (HOPC1)

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

Issuance Time:

Mar 20 2023 at 1:54 PM PDT

Next Issuance:

Mar 21 2023 at 9:00 AM PDT

Monitor Stage: N/A

Flood Stage: 15.0 Feet

Plot Type:

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

Historical Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2021*	948	4.36	Feb 2, 2021
2020*	2,740	8.20	Jan 16, 2020
2019*	22,200	22.95	Feb 27, 2019
2018*	9,160	16.26	Apr 6, 2018
2017*	16,600	22.25	Jan 11, 2017
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

Official 7 Day National Weather Service Forecast (CAZ113)

Tonight: Partly cloudy in the evening then becoming mostly cloudy. Chance of rain showers and snow showers overnight. Snow level 3000 feet. Lows 33 to 43.

Tuesday: Snow showers in the morning. Rain showers through the day. Snow level 3000 to 3500 feet. Snow accumulations up to 1 inch. Highs 42 to 54. Northeast wind around 20 mph.

Tuesday Night: Mostly cloudy. Rain showers likely in the evening, then chance of rain showers overnight. Lows 34 to 44.

Wednesday: Mostly cloudy. Rain likely. Highs 46 to 56.

Wednesday Night and Thursday: Mostly cloudy. Slight chance of rain showers. Lows 34 to 44. Highs 46 to 57.

Thursday Night: Partly cloudy. Lows 30 to 40.

Friday: Mostly cloudy in the morning then becoming partly cloudy. Slight chance of rain showers and snow showers. Highs 45 to 56.

Friday Night: Partly cloudy. Lows 27 to 37.

Saturday: Mostly sunny. Slight chance of rain showers and snow showers. Highs 46 to 57.

Saturday Night: Mostly clear. Lows 26 to 36.

Sunday: Partly cloudy in the morning then becoming mostly cloudy. Chance of rain and snow. Highs 45 to 55.

Sunday Night: Mostly cloudy. Rain and snow likely. Lows 31 to 41.

Monday: Rain and snow likely. Highs 41 to 51.

Impacts - E19 Information
15.0 Feet	Flooding of Highway 175 is expected at the approaches to the Russian River bridge. Expect minor flooding of crop land on the right bank of the river.
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.
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.
20.0 Feet	Flooding of low-lying structures east of the railroad tracks near Hopland.
21.0 Feet	Flooding of low-lying structures just west of the railroad tracks near Hopland.
23.0 Feet	Flooding of farm land, buildings and low-lying homes in the Hopland area. Flooding will begin in the Ukiah and Talmage areas.
24.0 Feet	Flooding of low-lying structures and farm land in the Hopland, Ukiah, and Talmage areas. Many secondary roads may also be flooded. Severe bank erosion is possible.
25.0 Feet	Severe bank erosion is likely with widespread flooding of farm land, 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.
26.0 Feet	Widespread major flooding will occur. Primary roads and some bridges will flood.
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 area are urged to move to high ground and take appropriate action to protect life and property.
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.
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.

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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