May 15, 2015
Moisture and instability ahead of an upper level low allowed for afternoon thunderstorms to develop across portions of central and northern Wyoming. Many of the storms were moving south to north within the counter-clockwise rotation of the low. Heavy rain, small hail, and funnel clouds were all observed in the Wind River and Big Horn basins.
Source: NOAA National Weather Service Storm Events Database (event 583106). Narrative written by NWS staff at the time of the event.
This event is one of many recorded floods in Park County. See the full FEMA flood zone map, NFIP claim totals, and disaster history for the area.