CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SOUTH FORK EEL RIVER - MIRANDA (MRNC1)

Latitude: 40.18º N	Longitude: 123.78º W	Elevation: 263 Feet
Location: Humboldt County in California		Bulletin Group: North Coast		River Group: North Coast

Issuance Time:

Dec 23 2025 at 8:07 PM PST

Next Issuance:

Dec 24 2025 at 9:00 AM PST

Action/Monitor: 27.0 Feet

Minor Flood: 33.0 Feet

Moderate Flood: 38.0 Feet

Major Flood: 42.0 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
Note: Water Year 2025 is currently showing peak daily mean values. These will be updated to instantaneous peaks in the coming months.
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025	41,800	25.26	Nov 22, 2024
2024	35,300	23.24	Jan 14, 2024
2023	51,700	28.16	Dec 30, 2022
2022	19,900	18.07	Oct 24, 2021
2021	10,000	14.14	Jan 13, 2021
Historical High Stage/Flow Events (Period of Record - Oct 1939 to Present) - Ranked by Flow
1965	199,000	46.00	Dec 22, 1964
1956	173,000	42.70	Dec 22, 1955
1986	123,000	38.29	Feb 17, 1986
1982	123,000	34.79	Dec 19, 1981
1974	122,000	34.57	Jan 16, 1974
1960	117,000	34.61	Feb 08, 1960

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
47.0 Feet	Extensive and severe flooding of all areas along the river. Severe damage to roads, bridges and structures can be expected. US Highway 101 and Highway 254 (Avenue of the Giants) will likely be closed. All persons in the vicinity of the river should take appropriate actions to protect life and property.
45.0 Feet	Severe flooding of many communities and roads along the river can be expected. Numerous road closures are likely, possibly including US Highway 101 and Highway 254 (Avenue of the Giants). All persons in the vicinity of the river should take appropriate actions to protect life and property.
42.0 Feet	Extensive and severe flooding of many portions of the Avenue of the Giants, especially areas in the vicinity of Sylvandale, Myers Flat, Weott and Phillipsville. Expect numerous road closures in these areas.
38.0 Feet	Considerable flooding of portions of the Avenue of the Giants (Highway 254) in the vicinity of Sylvandale, Myers Flat and Weott, with numerous road closures expected. Minor flooding will begin along Phillipsville Road and adjacent low lying areas.
35.0 Feet	Considerable flooding of portions of Avenue of the Giants in the vicinity of Sylvandale, Myers Flat and Weott is likely. Expect closure Of Avenue of the Giants (Highway 254) in numerous locations.
33.0 Feet	Flooding of portions of the Avenue of the Giants is likely in the vicinity of Sylvandale, and the Myers Flat and Redwood Giants Trailer Park. Flooding is also possible near Weott.
30.0 Feet	Flooding of portions of the Avenue of the Giants may occur, especially in the vicinity of Sylvandale and the Myers Flat and Redwood Giants Trailer Park.
27.0 Feet	Flooding of portions of the Avenue of the Giants (Highway 254) is possible near Sylvandale.

Official 7 Day National Weather Service Forecast (CAZ106)

Tonight: Rain in the evening, then rain showers and slight chance of thunderstorms overnight. Very windy. Some thunderstorms may produce heavy rainfall overnight. Lows 36 to 46. Southeast wind 25 to 40 mph in the valleys and southeast 30 to 45 mph at higher elevation.

Wednesday: Mostly cloudy. Rain. Snow level 4500 feet. Highs 46 to 58. South wind around 20 mph in the morning.

Wednesday Night: Rain in the evening, then rain showers and slight chance of thunderstorms overnight. Windy. Some thunderstorms may produce heavy rainfall overnight. Snow level 5000 feet. Lows 36 to 46. In the valleys, southeast wind 20 to 30 mph overnight. At higher elevation, southeast wind up to 20 mph increasing to 25 to 40 mph overnight.

Christmas Day: Windy. Rain showers and slight chance of thunderstorms. Snow level 4000 feet. Highs 40 to 52. South wind 20 to 35 mph with gusts at higher elevations to around 50 mph.

Thursday Night and Friday: Rain and snow. Snow level 4000 feet. Lows 34 to 44. Highs 40 to 52. Southeast wind around 20 mph.

Friday Night: Mostly cloudy. Chance of rain and snow. Lows 29 to 39.

Saturday: Mostly cloudy in the morning then clearing. Highs 42 to 54.

Saturday Night: Mostly clear. Lows 27 to 37.

Sunday and Sunday Night: Partly cloudy. Highs 49 to 60. Lows 29 to 39.

Monday through Tuesday: Mostly clear. Highs 53 to 66. Lows 33 to 43.

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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