CNRFC - Hydrology - River Guidance - Graphical RVF

Location:

MARK WEST CREEK - MIRABEL HEIGHTS (MWEC1)

Latitude: 38.49º N	Longitude: 122.85º W	Elevation: 50 Feet
Location: Sonoma County in California		Bulletin Group: Russian Napa		River Group: Russian Napa

Issuance Time:

Jul 03 2025 at 8:14 AM PDT

Next Issuance:

Jul 04 2025 at 9:00 AM PDT

Action/Monitor: 50.5 Feet

Minor Flood: 55.0 Feet

Moderate Flood: 59.0 Feet

Major Flood: 65.0 Feet

Please Note:

Stage forecasts at this location are uncertain due to backwater effects.

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

Flood Impacts
65.0 Feet	Major Flooding. Major roadway inundation on Trenton-Healdburg Road, Wohler Road in the vicinity of Mark West Creek, and Eastside Road. Trenton-Healdsburg Road bridge over Mark West Creek flooded and/or backwatered. Major flooding of lowest vineyards adjacent to channels, of approximately 5-10 feet deep or more. Lower Windsor Creek also likely flooding.
59.0 Feet	Moderate Flooding. Trenton-Healdsburg Road begins to flood at lowest spots on right bank (north side). Portions of Wohler Road downstream also likely flooded, including Wohler Road Bridge over Mark West Creek. NWS will issue Flash Flood Warning, if not yet already issued.
55.0 Feet	Minor Flooding. More severe flooding occurring on adjacent agricultural lands and access roads. NWS will issue an Urban/Small Stream Advisory, if not yet already issued.
50.5 Feet	Monitor Stage. Low-lying floodplain vineyards and agricultural land on both side of channel, mostly downstream of Trenton-Healdsburg Road, begin to flood.

Official 7 Day National Weather Service Forecast (CAZ506)

rest of Tonight: Mostly clear. Breezy. Lows in the upper 40s to mid 50s. West winds 20 to 30 mph.

Independence Day: Partly cloudy in the morning then becoming sunny. Breezy. Highs in the mid 60s to lower 80s. West winds 10 to 20 mph increasing to 20 to 30 mph in the afternoon.

Friday Night: Mostly clear. Breezy. Lows in the mid 40s to lower 50s. West winds 20 to 30 mph decreasing to 10 to 20 mph after midnight.

Saturday: Sunny. Highs in the upper 60s to mid 80s. Southwest winds 10 to 20 mph.

Saturday Night: Mostly clear. Lows in the upper 40s to mid 50s. Southwest winds 10 to 20 mph.

Sunday: Partly cloudy in the morning then becoming sunny. Highs in the lower 70s to mid 80s.

Sunday Night: Clear in the evening then becoming partly cloudy. Patchy fog. Lows in the upper 40s to mid 50s.

Monday: Partly cloudy in the morning then becoming sunny. Highs in the upper 60s to lower 80s.

Monday Night: Mostly clear in the evening then becoming mostly cloudy. Patchy fog. Lows in the upper 40s to mid 50s.

Tuesday: Mostly cloudy in the morning then becoming sunny. Highs in the upper 60s to mid 80s.

Tuesday Night: Mostly clear in the evening then becoming partly cloudy. Areas of fog. Lows in the lower to mid 50s.

Wednesday through Thursday: Mostly clear. Highs in the mid 70s to lower 90s. Lows in the 50s.

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 San Francisco Bay Area-Monterey 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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