CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MATTOLE RIVER - ETTERSBURG (ETTC1)

Latitude: 40.14º N	Longitude: 123.99º W	Elevation: 579 Feet
Location: Humboldt County in California		Bulletin Group: North Coast		River Group: North Coast

Issuance Time:

Jan 07 2026 at 7:06 AM PST

Next Issuance:

Jan 07 2026 at 3:00 PM 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 (CAZ104)

Tonight: Mostly cloudy until late tonight then becoming partly cloudy. Chance of rain showers through the night. Snow level 2500 to 3000 feet. Lows 31 to 41. Northwest wind 10 to 20 mph.

Thursday: Sunny. Highs 42 to 52. North wind 5 to 15 mph.

Thursday Night: Partly cloudy. Lows 31 to 41. Northeast wind 5 to 15 mph.

Friday: Sunny. Highs 50 to 60. Southeast wind around 5 mph.

Friday Night and Saturday: Partly cloudy. Lows 35 to 45. Highs 50 to 60. Southeast wind around 5 mph.

Saturday Night and Sunday: Mostly cloudy. Lows 37 to 47. Highs 50 to 63.

Sunday Night through Wednesday: Partly cloudy. Lows 40 to 50. Highs 53 to 67.

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.