Flood — Madison, Idaho

2018-03-14 to 2018-03-31 · near Edmonds, Madison, Idaho

Event narrative

Extensive snow melt combines with heavy rains to create extensive sheet flooding problems in Madison County. 200 miles of county roads were washed out or damaged. the worst of it came on March 22nd with heavy rains over the county. The majority of the road damage was in the eastern part of the county. The state of Idaho declared Madison County a disaster area on March 19th. Damage estimates on mainly the roads by county officials exceeded one million dollars. Rocky Hollow road was destroyed.

Wider weather episode

A return to heavy mountain snows in late February and early March added significantly to the snow pack especially in the Upper Snake River Highlands and snow melt and heavy rains occurred sporadically from the middle of the month onward. The worst of the flooding occurred in Clark and Madison which were both declared state disaster areas by the end of the month. Low elevations in the central mountains also began to experience with extensive damage also occurring in Blaine County.

View location on OpenStreetMap → (43.9200, -111.8800)

Source: NOAA Storm Events Database, event_id 747624. Narrative written by the NWS forecast office that issued the report.