Jun 29, 2013
Earlier in the day a surge of monsoon moisture tracked into the region from Nevada allowing for a good buildup of atmospheric moisture. A 40 knot west-southwest, mid-level jet maximum associated with an upper level wave combined with above normal moisture content (precipitable water values near one inch) and strong heating initiated supercell thunderstorms in the early evening hours over western Lemhi County. One particular supercell brought very heavy rains in a short amount of time inducing d
Source: NOAA National Weather Service Storm Events Database (event 460060). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Lemhi County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.