CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MATTOLE RIVER - PETROLIA (MTOC1)

Latitude: 40.31º N	Longitude: 124.28º W	Elevation: 40 Feet
Location: Humboldt County in California		Bulletin Group: North Coast		River Group: North Coast

Issuance Time:

Jan 07 2026 at 2:18 PM PST

Next Issuance:

Jan 08 2026 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 (CAZ104)

Today: Mostly sunny. Slight chance of rain and snow in the morning. Snow level 2000 to 2500 feet. Highs 41 to 51. North wind 5 to 15 mph.

Tonight: Partly cloudy. Lows 31 to 41. North wind around 15 mph shifting to the east overnight.

Friday: Sunny. Highs 51 to 61. Southeast wind around 5 mph.

Friday Night: Partly cloudy. Lows 35 to 45. Southeast wind around 5 mph.

Saturday: Mostly cloudy. Highs 51 to 61. Southeast wind around 5 mph.

Saturday Night and Sunday: Mostly cloudy. Lows 37 to 47. Highs 51 to 63.

Sunday Night and Monday: Partly cloudy. Lows 37 to 47. Highs 53 to 64.

Monday Night: Mostly clear. Lows 40 to 50.

Tuesday: Mostly sunny. Highs 57 to 67.

Tuesday Night and Wednesday: Mostly clear. Lows 41 to 51. Highs 56 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
Month:	Day:	Year:	Cycle:
To view other verification locations, use our Historical Graphical River Forecast Interface.