Please Note: 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.
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.
Official 7 Day National Weather Service Forecast (CAZ506)
Tonight: Partly cloudy in the evening then becoming mostly cloudy. Patchy dense fog in the evening, then areas of dense fog after midnight. Lows in the 40s to lower 50s. West winds up to 5 mph and becoming north after midnight.
Tuesday: Mostly cloudy in the morning then becoming partly cloudy. Areas of dense fog in the morning. Highs in the 60s to lower 70s. Northeast winds up to 5 mph and becoming southeast in the afternoon.
Tuesday Night: Partly cloudy in the evening. Patchy dense fog in the evening, then areas of dense fog after midnight. Rain likely after midnight. Lows in the 40s to lower 50s. South winds up to 5 mph.
Wednesday: Patchy dense fog in the morning. Rain likely in the morning, then a chance of rain in the afternoon. Highs in the 50s to mid 60s. Southwest winds 10 to 20 mph. Chance of rain 70 percent.
Wednesday Night: Mostly cloudy. Patchy dense fog. A chance of rain. Lows in the 40s. West winds 5 to 15 mph. Chance of rain 50 percent.
Thursday: Mostly cloudy. Patchy dense fog. A chance of rain. Highs in the mid 50s to lower 60s.
Thursday Night: Partly cloudy in the evening then becoming mostly clear. A slight chance of rain. Lows in the 30s to mid 40s.
Friday: Sunny. Highs in the mid 50s to lower 60s.
Friday Night: Mostly clear in the evening then becoming partly cloudy. Lows in the lower 30s to mid 40s.
Saturday: Partly cloudy in the morning then becoming mostly cloudy. Patchy dense fog. Highs in the mid 50s to lower 60s.
Saturday Night and Sunday: Mostly cloudy. A slight chance of rain. Lows in the mid 30s to upper 40s. Highs in the 50s to mid 60s.
Sunday Night: Partly cloudy in the evening then becoming mostly cloudy. Lows in the 30s to upper 40s.
Monday: Mostly cloudy in the morning then becoming partly cloudy. Patchy dense fog. Highs in the 50s to mid 60s.
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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