CNRFC - Hydrology - Observed River/Reservoir Conditions

TRINITY RIVER - HOOPA (HOOC1)

Latitude: 41.05º N	Longitude: 123.68º W	Elevation: 333 Feet
Location: Humboldt County in California		Bulletin Group: North Coast		River Group: Klamath

Action/Monitor: 44.0 Feet

Minor Flood: 48.0 Feet

Moderate Flood: 52.0 Feet

Major Flood: 56.0 Feet

Plot Type:

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*	46,500	28.44	Jan 14, 2024
2023*	66,500	32.28	Mar 15, 2023
2022*	16,600	20.91	Jan 8, 2022
2021*	13,300	19.67	Feb 16, 2021
2020*	25,100	23.65	Jan 26, 2020
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	57.00	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
1986*	116,000	42.43	Feb 18, 1986
* Discharge affected by regulation or diversion
** Most recent continuous record back to Oct 1931 with segmented periods back to Oct 1911

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Flood Impacts
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river is expected. Many road closures are likely including Highway 96 at several locations between Willow Creek and Weitchpec. Many homes and businesses in valley areas will be innundated.
55.0 Feet	Extensive and severe flooding between Willow Creek and Weitchpec, and flooding of many homes and businesses in the valley areas. Expect closure of Highway 96 between Willow Creek and Weitchpec.
53.0 Feet	Extensive flooding of all low lying areas adjacent to the river, including Highway 96 north and south of Hoopa. Significant damage to structures in these areas is likely.
51.0 Feet	Extensive flooding of all low lying areas adjacent to the river including Highway 96 both north and south of Hoopa is likely. Significant damage to structures in these areas is possible.
48.0 Feet	Considerable flooding of low lying areas adjacent to the river including Highway 96 is likely. Significant damage to structures in these areas is possible.
46.0 Feet	Flooding of many low lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
44.0 Feet	Minor flooding of the lowest lying areas may occur.

Official 7 Day National Weather Service Forecast (CAZ105)

Today: Mostly cloudy in the morning then becoming partly cloudy. Highs 65 to 80.

Tonight: Mostly cloudy. Lows 36 to 46.

Sunday: Mostly cloudy. Slight chance of rain in the afternoon. Snow level 4000 feet. Highs 53 to 68.

Sunday Night: Rain. Snow level 4500 to 5000 feet. Lows 37 to 47.

Monday: Rain. Snow level 4500 feet. Highs 47 to 62.

Monday Night: Mostly cloudy. Slight chance of rain. Lows 37 to 47.

Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Highs 55 to 70.

Tuesday Night: Mostly cloudy. Lows 38 to 48.

Wednesday and Wednesday Night: Partly cloudy. Highs 59 to 74. Lows 39 to 49.

Thursday through Friday: Partly cloudy. Highs 68 to 83. Lows 40 to 50.

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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