| Back to River Map | <<< Previous Forecast Point | | | End of River Group | Printer Version | Tabular Version |  |
| Latitude: 38.37º N | Longitude: 122.30º W | Elevation: 25 Feet | |
| Location: Napa County in California | River Group: Russian Napa | ||
| Issuance Time: | Mar 31 2023 at 1:30 PM PDT | Next Issuance: | Apr 01 2023 at 9:00 AM PDT |
| Monitor Stage: 22.0 Feet | Flood Stage: 25.0 Feet |
| Observed Data Credit | |
 | Raw streamflow data is provided by the US Geological Survey (USGS). |
Historical Stage/Flow Data |
|||
|
Water Year
|
Peak Discharge (cfs)
|
Stage (feet)
|
Date
|
| Most Recent 5 Years | |||
2021* |
87 |
4.11 |
Feb 2, 2021 |
2020* |
820 |
7.48 |
Dec 8, 2019 |
2019* |
16,600 |
26.47 |
Feb 27, 2019 |
2018* |
4,580 |
16.74 |
Mar 22, 2018 |
2017* |
15,900 |
26.81 |
Jan 8, 2017 |
| Historical High Stage/Flow Events (Period of Record - Oct 1959 to Present) - Ranked by Flow | |||
1986* |
37,100 |
30.20 |
Feb 18, 1986 |
1995* |
32,600 |
30.50 |
Mar 09, 1995
|
2006* |
29,600 |
29.85 |
Dec 31, 2005 |
| * Discharge affected by regulation or diversion | |||
| Location Photographs | ||
| ESRI™ Locator Map |
| Official 7 Day National Weather Service Forecast (CAZ506) |
| Today: Mostly cloudy. Patchy fog in the morning. A slight chance of showers in the afternoon. Highs in the 50s to lower 60s. South winds 5 to 15 mph. Tonight: Mostly cloudy. Lows in the 30s to mid 40s. West winds 5 to 15 mph. Sunday: Mostly cloudy. Highs in the 50s to lower 60s. West winds 10 to 20 mph. Sunday Night: Mostly clear. Lows in the mid 30s to lower 40s. West winds 10 to 20 mph. Monday: Sunny, breezy. Highs in the 50s to lower 60s. Northwest winds 20 to 30 mph decreasing to 10 to 20 mph in the afternoon. Monday Night: Clear, breezy. Lows in the mid 30s to lower 40s. Tuesday and Tuesday Night: Partly cloudy. Highs in the 50s. Lows in the mid 30s to lower 40s. Wednesday through Friday: Partly cloudy. A slight chance of showers. Highs in the mid 50s to upper 60s. Lows in the 30s to upper 40s. |
| Impacts - E19 Information | |
| 20.0 Feet | Erosion of lowest agricultural areas along river begins. |
| 22.0 Feet | In the city of Napa, the Napa River Dry Bypass is fully inundated and flow begins to cross McKinstry Street. |
| 24.0 Feet | In the city of Napa, flow begins to leave the Napa River channel at RiverPointe (North of Lincoln Avenue). |
| 25.0 Feet | Flooding of lowest parts of towns in reach begins. Inundation of lowest agricultural land in Napa Valley. Some secondary roads are inundated. Moderate damage from bank erosion and sediment deposition throughout the reach. |
| 26.0 Feet | In the city of Napa, flow begins to leave the Napa River channel in the South Coombs area (north of Imola Avenue) and the south oxbow (near Taylor Street). Crop losses and erosion damage become serious. Moderate flood damage in lower parts of urban areas along the reach. Transportation in the Napa Valley becoming difficult. The flood of 2/3/1998 measured 26.72 feet. |
| 27.0 Feet | In the city of Napa, moderate flooding begins on the east side of Napa River near Milliken Creek Inn. |
| 28.0 Feet | In the city of Napa, significant flooding occurs near Lincoln Avenue with some secondary roads inundated. Major flooding of towns within the reach of the gage, especially Napa. Inundation of agricultural land, major damage from bank erosion and sediment deposition in Napa Valley. Transporation difficult throughout the Napa Valley. The 1/1/1997 flood measured 28.07 feet and cut off east-west travel except at Highway 29 over the Napa River. |
| 29.0 Feet | In the city of Napa, the Soscol Corridor between the Bypass and LakePark is inundated, and the LakePark area begins to flood and flow begins to leave the Napa River at Riverside Drive. |
| 30.0 Feet | In the city of Napa, flooding in the south oxbow area expands south towards Tulocay Creek and Imola Avenue begins to flood on both sides of the river. Major flooding continues in the Napa Valley, with major damage to homes and businesses, especially in Napa. Transportation impossible in the Napa Valley. 20,000 acres possible flooded in the Napa Valley. Between 5,000 and 7,000 evacuations occurred in the 2/18/1986 record flood, 37,000 cfs and 30.20 feet. |
| 32.0 Feet | Widespread flooding occurs in the entire Napa Valley, with transportation impossible. Disastrous damage to homes and businesses in the Napa Valley, especially the city of Napa. |
| 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. |
Follow us on Twitter
Follow us on Facebook
Follow us on YouTube
NWS RSS Feed