Severe · Flood WatchActive alert
Flood Watch issued October 22 at 11:36AM PDT until October 23 at
Affecting Surprise Valley California; Lassen-Eastern Plumas-Eastern Sierra Counties; Western Nevada Basin and Range including Pyramid Lake; Northern Washoe County
In effect until: Oct 23, 2026, 12:00 PM
Surprise Valley California; Lassen-Eastern Plumas-Eastern Sierra Counties; Western Nevada Basin and Range including Pyramid Lake; Northern Washoe County
Possible impact zone; conditions develop through 12:00 PM.
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
Read the original bulletin (official text)
* WHAT...Flooding caused by excessive rainfall is possible. * WHERE...Northeastern Lassen County and Surprise valley in California, and northern Washoe County and northwestern Pershing County in Nevada. The watch area includes the Biscar and S1-Vya burn scars. * WHEN...Through 5 AM PDT Friday. * IMPACTS...Small creeks and streams may flood rural roads. Increased sediment transport from burn scars may clog culverts and ditches. * ADDITIONAL DETAILS... - Storm total rainfall of 0.5 to 1.5 inches, locally 2 inches or more, is possible through through early Friday. Heavier rain this afternoon and evening may briefly exceed 0.5 inch per hour. Runoff may linger overnight. - Vulnerable locations include remote ranches within and near the Biscar and S1-Vya burn scars, downstream drainages, and culverts along US-395 from Stoney Creek Road north to Rye Patch Road. - http://www.weather.gov/safety/flood
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Alert data: U.S. National Weather Service / NOAA · Translation: WeatherTranslate™