National Weather Service California Nevada River Forecast Center Department of Commerce National Oceanic and Atmospheric Administration National Weather Service


Latitude: 38.51º NLongitude: 122.45º WElevation: 195 Feet
Location: Napa County in CaliforniaBulletin Group: Russian NapaRiver Group: Russian Napa
Monitor Stage: 16.0 FeetFlood Stage: 18.0 Feet

Observed Data Credit
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Raw streamflow data is provided by the US Geological Survey (USGS).
View USGS Data for this station location.

Historical Stage/Flow Data
Water Year
Peak Discharge (cfs)
Stage (feet)
 Most Recent 5 Years
2022* 7,560 16.82 Oct 24, 2021
178 2.26 Jan 27, 2021
Dec 7, 2019
Feb 27, 2019
Mar 22, 2018
 Historical High Stage/Flow Events (Period of Record - Jun 2000 to Present)* - Ranked by Flow
Dec 31, 2005
Feb 17, 1986
1997 13,100 17.70 Jan 1, 1997
Dec 22, 1955
1963 12,300 15.30 Jan 31, 1963
* Discharge affected by regulation or diversion
** Most recent continuous record back to Jun 2000 with segmented periods back to Oct 1929
*** Flood of record at old gage site
Location Photographs
ESRI™ Locator Map
Impacts - E19 Information
16.0 FeetMonitor Stage. WFO Monterey/San Francisco Bay Area may issue a Flood Watch to cover Napa Valley region flood potential at this stage.
18.0 FeetFlood Stage. Minor flooding of low lying agricultural areas along river begins. Low lying rural residential areas immediately adjacent to the river and some secondary roads affected.
20.0 FeetModerate flooding of the lower portions of Silverado Trail along the reach. Inundation of low lying residential areas along the east river bank in the vicinity of Pope Street Bridge. Secondary and many primary roads inundated. Most major cross roads inundated and unsafe.
22.0 FeetMajor flooding throughout the upper Napa Valley with most roads inundated, making travel extremely difficult and unsafe.
24.0 FeetDisastrous flooding. Widespread flooding across the upper Napa Valley with travel essentially impossible. The peak water level during the flood of 12/31/2005 measured 23.6 feet.
Official 7 Day National Weather Service Forecast   (CAZ506)
Today: Partly cloudy in the morning then becoming mostly cloudy. Highs in the 60s to upper 70s. West winds 10 to 20 mph.

Tonight: Mostly cloudy. A slight chance of showers after midnight. Lows in the 50s. West winds 10 to 20 mph.

Saturday: Mostly cloudy. A slight chance of showers. Highs in the lower 60s to mid 70s. West winds 5 to 15 mph.

Saturday Night: Mostly clear. Lows in the upper 40s to mid 50s. Northwest winds 5 to 10 mph.

Sunday: Sunny. Highs in the upper 60s to lower 80s. North winds up to 5 mph and becoming northwest 5 to 15 mph in the afternoon.

Sunday Night: Mostly clear. Lows in the upper 40s to mid 50s.

Monday through Tuesday: Mostly clear. Highs in the lower 70s to mid 80s. Lows in the lower to mid 50s.

Tuesday Night through Thursday: Mostly clear. Lows in the mid 50s to lower 60s. Highs in the upper 70s to lower 90s.
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.