Full Notification

The National Weather Service has re-issued a Flash Flood Watch for Napa County through Thursday afternoon. A moderate atmospheric river is currently impacting the region, bringing periods of moderate to heavy rain.

The NWS Watch cautions that rapid ponding of water in urban areas and areas with poor drainage may occur. Those living or driving through areas of steep terrain are cautioned that mudslides or washouts are a possibility.

A Flash Flood Watch is issued when conditions are favorable for flooding. It does not mean flooding will occur, but it is possible. In contrast, a Flash Flood Warning is issued when flash flooding is imminent or occurring. When NWS upgrades a Flash Flood Watch to a Flash Flood Warning, based on observed precipitation, they send a Wireless Emergency Alert (WEA) message to cell phones in the impacted areas through mobile carriers. WEA alerts are distinct from regular text messages in that they feature a special tone and vibration, both repeated twice.  The WEA message will typically show the type and time of the alert, the agency issuing the alert, and any action the agency advises the public to take in response. NWS has advised that rainfall thresholds may trigger the issuance Flash Flood Warnings overnight and residents in impacted areas may receive WEA alerts.

**REMINDER: Do NOT attempt to cross flooded roadways – ‘Turn Around, Don’t Drown’!**

For a complete list of Napa County sandbag locations, visit Napa County’s flood preparedness page.

To see Napa County road closures in effect, visit the Road Closures & Traffic Map.

And to see Napa County’s real-time rainfall and river-stream data network, visit the OneRain website.  

To learn more about the potential hazards in a post-fire landscape visit the County’s post-fire watershed recovery website.

To reach Napa County’s non-emergency Watershed Protection Hotline, Monday-Friday between the hours of  8:00 am and 5:00 pm, call (707) 299-1350.