Flood in Lemhi County, Idaho

Local emergency manager reported flooding at the Oregon Bar campground 7 miles north of Salmon. Also an NWS employee reported minor flooding in the Elk Bend area, where water was flowing over yards and into outbuildings.

A few warm days and nights to increase snowmelt, followed by a rain event that had several hours of rain over the Salmon River Basin culminated in high flows the evening of May 6th. Twelve hour precipitation at the Salmon RAWS was recorded at 0.82', with values up stream in the basin ranging from around 0.15' to 0.75'. There was widespread light rain with some very wet, fast moving showers and thunderstorms embedded. Also, the Pahsimeroi River upstream along the county border registered a record discharge into the Salmon River, but this was largely thought to be backflow from the Salmon itself as the Pahsimeroi gage is near the mouth.