CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

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

Issuance Time:

Dec 24 2025 at 7:29 AM PST

Next Issuance:

Dec 24 2025 at 3:00 PM PST

Action/Monitor: 44.0 Feet

Minor Flood: 48.0 Feet

Moderate Flood: 52.0 Feet

Major Flood: 56.0 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*	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: Mostly cloudy. Snow in the morning. Chance of rain through the day. Windy. Snow level 4000 to 4500 feet. Snow accumulations up to 1 inch. Highs 45 to 58. South wind 25 to 35 mph in the morning.

Tonight: Rain likely in the evening, then rain overnight. Windy. Snow level 5000 feet. Lows 36 to 46. Southeast wind 20 to 25 mph in the valleys and southeast 20 to 35 mph at higher elevation.

Christmas Day: Rain and snow. Windy. Near steady temperature in the lower 40s. Snow may be heavy at times in the morning. Snow level 4000 feet. Snow accumulations of 2 to 4 inches. In the valleys, south wind 20 to 25 mph. At higher elevation, south wind 20 to 35 mph decreasing to up to 25 mph in the afternoon.

Thursday Night: Breezy. Rain and snow. Snow level 3500 to 4000 feet. Lows 34 to 44. Southeast wind 20 to 25 mph with gusts at higher elevations to around 50 mph.

Friday: Breezy. Rain and snow. Snow level 3500 to 4000 feet. Highs 39 to 54. Southeast wind 20 to 25 mph with gusts at higher elevations to around 45 mph.

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

Saturday through Sunday Night: Partly cloudy. Highs 44 to 59. Lows 30 to 40.

Monday through Tuesday: Mostly clear. Highs 51 to 65. 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.

NWS RSS Feed

Verification - Historical Graphical RVF
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.