CNRFC - Hydrology - Observed River/Reservoir Conditions

SOUTH FORK EEL RIVER - MIRANDA (MRNC1)

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

Monitor Stage: 27.0 Feet

Flood Stage: 33.0 Feet

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
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

Official 7 Day National Weather Service Forecast (CAZ106)

Today: Patchy valley fog in the morning. Rain showers and snow showers likely through the day. Snow level 500 feet rising to 2000 feet in the afternoon. Snow accumulations up to 2 inches. Highs 33 to 45.

Tonight: Rain showers and snow showers likely in the evening, then rain showers and snow showers overnight. Snow may be heavy at times overnight. Snow level 1500 to 2000 feet. Snow accumulations of 5 to 7 inches. Lows 25 to 35.

Thursday: Rain showers and snow showers. Snow level 1500 to 2000 feet. Snow accumulations of 2 to 4 inches. Highs 33 to 45.

Thursday Night: Partly cloudy. Chance of rain showers and snow showers. Snow level 1500 feet. Lows 20 to 30.

Friday: Mostly cloudy. Chance of rain showers and snow showers. Snow level 1000 feet rising to 2500 feet in the afternoon. Highs 38 to 48.

Friday Night: Mostly cloudy. Rain showers and snow showers likely. Lows 28 to 38.

Saturday and Saturday Night: Rain showers and snow showers. Highs 39 to 51. Lows 31 to 41.

Sunday through Monday: Rain showers. Highs 42 to 54. Lows 35 to 45.

Monday Night and Tuesday: Rain showers and snow showers. Lows 34 to 44. Highs 42 to 56.

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.

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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