National Weather Service Advanced Hydrologic Prediction Service

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Weather Forecast Office Eureka, CA

California Nevada River Forecast Center

Hydrograph

River at a Glance

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About this graph

Tabular Data (UTC)

Tabular Data (PDT)

Datum: Not Available

Metadata

NOTE: Gauge reading affected by reservoir operations.

Reliability of the Forecast: Based on current and forecast river, weather and reservoir conditions

NOTE: Forecasts for the Trinity River at Hoopa are issued routinely year-round.

Return to Area Map

Flood Categories (in feet)

Major Flood Stage:	56
Moderate Flood Stage:	52
Flood Stage:	48
Action Stage:	44
Low Stage (in feet):	-9999

Historic Crests
(1) 57.00 ft on 12/22/1964
(2) 50.30 ft on 12/22/1955
(3) 45.98 ft on 01/16/1974
(4) 43.16 ft on 01/27/1983
(5) 42.97 ft on 01/01/1997
Show More Historic Crests

(P): Preliminary values subject to further review.

Recent Crests
(1) 32.58 ft on 03/15/2023 (P)
(2) 30.29 ft on 12/31/2022
(3) 20.13 ft on 12/24/2021
(4) 23.65 ft on 01/26/2020
(5) 36.31 ft on 02/27/2019
Show More Recent Crests

(P): Preliminary values subject to further review.

Low Water Records
Currently none available.

For more information on your flood risk go to www.floodsmart.gov.

Show FEMA's National Flood Hazard Layers

Zoom Level:10

	Gauge Location	Disclaimer
Latitude/Longitude Disclaimer: The gauge location shown in the above map is the approximate location based on the latitude/longitude coordinates provided to the NWS by the gauge owner.

Flood Impacts & Photos

If you notice any errors in the below information, please contact our Webmaster
57	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	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	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	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	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	Flooding of many low lying areas near the river is likely. Minor flooding may occur over Highway 96 between Willow Creek and Hoopa.
44	Minor flooding of the lowest lying areas may occur.

About This Location

Latitude: 41.049852° N, Longitude: 123.673668° W, Horizontal Datum: NAD83/WGS84

River Stage Reference Frame	Gauge Height	Flood Stage	Uses
NWS stage	0 ft	48 ft	Interpreting hydrographs and NWS watch, warnings, and forecasts, and inundation maps
Vertical Datum	Elevation (gauge height = 0)	Elevation (gauge height = flood stage)	Elevation information source
NAVD88	Not Available	Not Available	Survey grade GPS equipment, FEMA flood plain maps, newer USGS topographic maps
NGVD 29	274.82 ft	322.82 ft	Older USGS topographic maps, NGVD29 benchmarks
MSL	Not Available	Not Available	Older USGS topographic maps, MSL benchmarks
Other	Not Available	Not Available

Current/Historical Observations:

U.S. Geological Survey (USGS) Data and Site Info for Hoopa

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Collaborative Agencies

The National Weather Service prepares its forecasts and other services in collaboration with agencies like the US Geological Survey, US Bureau of Reclamation, US Army Corps of Engineers, Natural Resource Conservation Service, National Park Service, ALERT Users Group, Bureau of Indian Affairs, and many state and local emergency managers across the country. For details, please click here.

NWS Information

National Weather Service
Eureka Weather Forecast Office
300 Startare Drive
Eureka, CA 95501
(707) 443-6484
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Page last modified: 2-Nov-2020 7:27 PM

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