CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

SOUTH FORK TRINITY RIVER - HYAMPOM (HYMC1)

Latitude: 40.65º N	Longitude: 123.49º W	Elevation: 1211 Feet
Location: Trinity County in California		Bulletin Group: North Coast		River Group: Klamath

Issuance Time:

Dec 30 2025 at 1:16 PM PST

Next Issuance:

Dec 31 2025 at 9:00 AM PST

Action/Monitor: N/A

Minor Flood: N/A

Moderate Flood: N/A

Major Flood: N/A

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.

Location Photographs
Upstream Photo	Gage House Photo	Downstream Photo

ESRI™ Locator Map

Official 7 Day National Weather Service Forecast (CAZ108)

Today: Mostly cloudy. Slight chance of rain in the morning, then chance of rain in the afternoon. Highs 49 to 62.

Tonight: Rain. Lows 37 to 47.

New Years Day: Patchy valley fog in the morning. Rain through the day. Highs 44 to 57.

Thursday Night: Rain. Lows 39 to 49. Southeast wind around 20 mph.

Friday: Rain. Highs 43 to 55. Southeast wind around 20 mph with gusts at higher elevations to around 35 mph.

Friday Night: Rain showers and slight chance of thunderstorms. Lows 34 to 44.

Saturday through Sunday: Rain and snow. Highs 37 to 50. Lows 33 to 43.

Sunday Night: Rain and snow. Lows 31 to 41.

Monday: Rain and snow. Highs 37 to 51.

Monday Night: Mostly cloudy. Chance of rain and snow. Lows 29 to 39.

Tuesday: Mostly cloudy. Chance of rain and snow. Highs 40 to 55.

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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Verification - Historical Graphical RVF
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To view other verification locations, use our Historical Graphical River Forecast Interface.