Flash Flood — Lincoln, Wyoming

2014-08-14 · near Alpine, Lincoln, Wyoming

Event narrative

Heavy rain caused several mudslides across US Highway 89 around milepost 120 in the steep terrain of Snake River Canyon east of Alpine. Rainfall totals were estimated at one-half to three-quarters of an inch in less than 40 minutes. The highway was closed for about three hours and several vehicles were damaged. The slides, mostly composed of mud, were three to four feet deep in some places.

Wider weather episode

Slow-moving thunderstorms developed over eastern Idaho and drifted east into Lincoln County. A moist airmass combined with the slow movement of the storms resulted in heavy rainfall and several mudslides across US Highway 89 just east of Alpine.

View location on OpenStreetMap → (43.1820, -110.9861)

Source: NOAA Storm Events Database, event_id 530647. Narrative written by the NWS forecast office that issued the report.