May 18, 2018
An area of showers and thunderstorms formed over Nez Perce County during the morning hours of May 18th. Lewiston ASOS reported 0.99 inches of rain while the COOP Observer at Nez Perce reported 1.17 inches of rain from these storms. This rain produced a number of secondary road washouts and minor main road damage through out the county. In the Lewiston area urban flooding affected parking lots and poor drainage properties including a number of apartments in Lewiston.
Source: NOAA National Weather Service Storm Events Database (event 758589). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Nez Perce County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.