Aug 9, 2013
A wave of monsoon moisture tracked south to north across western Montana on August 9, 2013. Embedded multicellular thunderstorms produced very heavy rain with flash flooding reported near Drummond and gusty winds that brought tree damage to portions of the Bitterroot and Missoula Valleys.
Source: NOAA National Weather Service Storm Events Database (event 472152). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Granite County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.