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:

Jul 19 2025 at 7:48 AM PDT

Next Issuance:

Jul 20 2025 at 9:00 AM PDT

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 clear. Lows 50 to 60. North wind 5 to 15 mph with gusts at higher elevations to around 30 mph.

Sunday: Sunny. Highs 75 to 90. North wind 5 to 15 mph with gusts at higher elevations to around 30 mph.

Sunday Night: Partly cloudy. Lows 49 to 59. North wind 5 to 15 mph with gusts at higher elevations to around 30 mph.

Monday: Partly cloudy. Highs 67 to 82. Northwest wind around 10 mph.

Monday Night and Tuesday: Partly cloudy. Lows 48 to 58. Highs 67 to 82. Northwest wind around 10 mph.

Tuesday Night and Wednesday: Partly cloudy. Lows 49 to 59. Highs 68 to 83.

Wednesday Night and Thursday: Mostly cloudy. Lows 49 to 59. Highs 68 to 83.

Thursday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows 49 to 59.

Friday: Mostly cloudy in the morning then becoming partly cloudy. Highs 67 to 82.

Friday Night and Saturday: Partly cloudy. Lows 48 to 58. Highs 68 to 83.

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.