Mar 21, 2018
Torrential rain from an atmospheric river with locally heavy convective showers brought flash flooding to portions of the northern Sierra and Motherlode foothills. The heaviest flooding was in Groveland, where 4-5 of rain fell, combining with 8-9 of rain in higher elevations upstream. There was also widespread damage in Tuolumne County to roads from debris flows, soil erosion, erosion of water conveyance systems, sewer systems that were inundated with excess water and debris. Roads damaged inlud
Source: NOAA National Weather Service Storm Events Database (event 747042). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Tuolumne County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.