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

Monitor Stage: 44.0 Feet

Flood Stage: 48.0 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
2022*	16,600	20.91	Jan 8, 2022
2021*	13,300	19.67	Feb 16, 2021
2020*	25,100	23.65	Jan 26, 2020
2019*	88,100	36.31	Feb 27, 2019
2018*	39,800	26.87	Apr 7, 2018
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

Impacts - E19 Information
44.0 Feet	Minor flooding of the lowest lying areas may occur.
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.
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.
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.
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 likely.
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.
57.0 Feet	Severe flooding of roads, bridges and structures in and around low areas of the river. 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 inundated.

Official 7 Day National Weather Service Forecast (CAZ105)

Tonight: Partly cloudy. Lows 42 to 52.

Friday: Sunny. Highs 67 to 82.

Friday Night: Partly cloudy. Lows 42 to 52.

Saturday: Mostly sunny. Slight chance of rain. Snow level 4500 feet. Highs 59 to 74.

Saturday Night and Sunday: Partly cloudy. Lows 34 to 44. Highs 62 to 77. North wind around 20 mph.

Sunday Night through Monday Night: Partly cloudy. Lows 40 to 50. Highs 65 to 80.

Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Highs 59 to 74.

Tuesday Night: Mostly cloudy. Lows 38 to 48.

Wednesday: Mostly cloudy. Slight chance of rain. Highs 56 to 71.

Wednesday Night and Thursday: Mostly cloudy. Chance of rain. Lows 37 to 47. Highs 56 to 71.

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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