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 Mean Daily Stage/Flow Data
Water Year	Peak Discharge (cfs)	Stage (feet)	Date
Most Recent 5 Years
2025*	58,300	30.79	Feb 04, 2025
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
Historical High Stage/Flow Events (Period of Record - Oct 1931 to Present)** - Ranked by Flow
1965*	231,000	40.30	Dec 22, 1964
1956	190,000	36.90	Dec 22, 1955
1974*	145,000	45.98	Jan 16, 1974
1958	125,000	29.15	Feb 19, 1958
1940	124,000	31.20	Feb 28, 1940
1983*	122,000	43.16	Jan 27, 1983
1997*	122,000	42.97	Jan 01, 1997
* 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: Rain showers likely in the morning, then rain showers in the afternoon. Highs 48 to 63.

Tonight: Rain showers. Snow level 5000 to 5500 feet. Lows 37 to 47.

Monday: Mostly cloudy. Rain showers in the morning, then slight chance of rain showers in the afternoon. Snow level 4500 feet. Highs 45 to 60.

Monday Night: Partly cloudy. Slight chance of rain showers. Snow level 4500 to 5000 feet. Lows 35 to 45.

Tuesday: Mostly sunny. Highs 48 to 63.

Tuesday Night: Mostly clear. Patchy frost. Lows 32 to 42.

Wednesday: Partly cloudy. Patchy frost. Chance of rain showers. Highs 51 to 66.

Wednesday Night and Thursday: Mostly cloudy. Rain showers likely. Lows 36 to 46. Highs 51 to 66.

Thursday Night: Mostly cloudy in the evening then becoming partly cloudy. Chance of rain showers. Lows 34 to 44.

Friday and Friday Night: Partly cloudy. Highs 51 to 66. Lows 36 to 46.

Saturday: Partly cloudy. Slight chance of rain showers. Highs 53 to 68.

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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