Jun 24, 2011
The high waters at the confluence of the Lamar River and Soda Butte Creek combined to undercut and damage a 200-foot-section of Yellowstone National Park's Northeast Entrance road. The first extended period of warm weather caused melting of a large late-season snowpack which increased flow in both channels. Flow on the Lamar River peaked on Friday, June 24, at around 11,000 cfs and crested near 9.5 feet. Only the eastbound lane of the road was impacted, but the erosion still necessitated complet
Source: NOAA National Weather Service Storm Events Database (event 325522). 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.