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Flood in Shoshone County, Idaho

Flood March 15, 2017 – March 31, 2017 · Shoshone County, Idaho

$385K
Damage as recorded

Where the report was made, with tornadoes recorded within 15 miles over the years.

What the National Weather Service wrote

Snow melt and periodic heavy rain during the month of March caused numerous debris flows and areal flooding issues through out the county. Many road washouts and closures affected travel and cut off residents of some communities until emergency repairs could be made days later. Shoshone County was included in a Presidential Disaster Declaration as a result of the damage sustained during this episode.

The wider storm

March was a very wet month over the Idaho Panhandle. A series of moist Pacific storm systems brought periodic heavy rain to the region in addition to warmer temperatures which quickly melted low elevation snow pack. Bonners Ferry recorded 4.58 inches of precipitation for the month which was 2.92 inches above normal. Coeur D'Alene received 4.38 inches which was 2.04 inches above normal and The University of Idaho at Moscow recorded 7.19 inches which was 4.50 inches above normal.

All of this water quickly saturated the ground leading to numerous debris flows in steep terrain and widespread flooding in fields and low spots. Numerous roads were flooded or cut by debris flows through out the Idaho Panhandle during the second half of March.

The St. Joe River, the Cour D'Alene River and Palouse River as well as numerous smaller streams and lakes rose above Flood Stage during this event. Lake Coeur D' Alene and the Spokane River draining Lake Coeur d'Alene also crested above Flood Stage damaging numerous docks, parks and homes along the shore line and river.

Idaho State declared a State of Emergency for seven counties in North Idaho to assist recovery crews in obtaining resources to repair damage to area roads and other infrastructure. These counties were also included in a Presidential Disaster Declaration as a result of this very wet period.

Began near Stetson (46.7666, -114.9005).

Source: NOAA Storm Events Database, event 688069. Narratives are written by the National Weather Service forecast office that issued the report.

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