Jul 17, 2013
Convective activity developed early in the afternoon with thunderstorms rapidly developing over West and Southwest Montana in response to an upper trough moving across Northwest Montana into southern Alberta. Though jet streak energy supported the system, convective parameters were not overly impressive. Additionally, precipitable water values were very high across the CWA translating to heavy rain with some isolated to scattered severe storms.
Source: NOAA National Weather Service Storm Events Database (event 470403). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Beaverhead County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.