Custer storm history

The Salmon River in Salmon reached moderate flood stage in May and this caused flooding from the headwaters of the Salmon south through Challis into Custer County. Trail Creek, Valley Creek, Garden Creek and Antelope Creek all overflowed banks with flood warnings throughout the m…

A mudslide occurred in Custer County on Bayhorse Creek Rd about 1 mile from the Bayhorse town site. One to one and a half inches of rain fell in a two hour period.

The Idaho Transportation Department closed a 12-mile stretch of state Highway 21, from Banner Summit to Grandjean Road, due to a landslide on on August 26th. ITD stated on Facebook around 5:30 p.m. Tuesday that the section of highway will be 'potentially' closed for the next two …

The Little Creek mesonet site measured a 64 mph thunderstorm outflow wind gust.

A 60 mph wind gust was measured at the Challis airport ASOS.

A large tree was blown down on a house with minor roof damage southeast of Mackay.

A 60 mph wind gust measured at the Stanley RAWS.

The ITD mesonet site in Clayton recorded a 63 mph wind gust.

A 61 mph wind gust recorded at Horton Peak mesonet site.

A 59 mph wind gust was recorded at the Challis Regional Airport ASOS.

A 58 mph wind gust recorded by spotter in Challis.

A 58 mph thunderstorm outflow wind measured at Challis Airport.

Trained spotter had a 61 mph wind gust.

Tree blown down in Challis in 60 mph wind gusts.

Challis airport recorded 60 mph wind gust.

Private weather station measured 58 mph gust just off of Idaho Highway 75.

Heavy rain caused a landslide blocking all lanes of Highway 75 near US Highway 93 south of Challis.

Forest Service road 135 washed away near the intersection of Bear Creek and Antelope Pass Roads. Rainfall combined with snow melt continued to create flooding in the Salmon Challis National Forest.

A NWS survey found evidence of an extensive mud slide along and across Highway 75 North of Clayton.

Idaho Transportation Department reported multiple mudslides and rock falls along US 93 between Evans and McKim Creek roads.

Idaho Transportation Department reported a mudslide and running water across Idaho Route 75 between East Fork Rd and Malm Gulch Rd completely blocking the highway.

A 61 mph gust measured at Challis ASOS.

A 61 mph wind gust measured in Challis.

Six trees down On Yankee Fork River in Clayton. Metal roof torn off the Yankee Fork Ranger Station .

The Big Lost Wood River flooded at Leslie on Highway 93. Two homes were affected at the foundation with flooding. They were upstream of the Highway 93 bridge over the Big Lost River.

Sheet flooding and minor ice jam flooding occurred throughout March as snow began to melt with the warmer temperatures along with periods of rain the latter half of the month. County road and field damage occurred with damage estimates over 60 thousand dollars.

The Salmon River in Salmon had reached moderate flood stage in May and stayed at flood stage into June and this caused flooding from the headwaters of the Salmon south through Challis into Custer County. The Yankee Fork and East fork of the Salmon River flooded along with Thompso…

Road damage from melting of heavy winter snows continued throughout the county along with mainly minor field flooding and occasional ice jams near the Butte County border.

The combination of record or near record snows in December and January with a warmup in February caused sheet flooding and some ice jam flooding as well. An ice jam on the Lost River near Darlington caused flooding to some homes on that river. Extensive road damage occurred throu…

One inch hail near Leslie, Idaho.

Farmers and ranchers in Custer County were declared by the USDA to qualify for natural disaster assistance due to crop damage from heavy August rains. Eastern Idaho barley crop damage was estimated at 64 million dollars with a portion of that in Custer County.

Custer County Sheriffs office reported 1 foot of water near Garden Creek affecting power and telephone poles.

Rainfall of 0.30 inches in 15 minutes caused extensive street flooding in the city of Challis.

Wind gusts estimated over 60 mph uprooted a large spruce tree in Challis and it took out a Custer Telephone cable TV line. Salmon River Electric reported power outages in the Yankee Fork and Rod and Gun Club areas. The Yankee Fork outage was due to a tree falling on the Yankee Fo…

Valley Creek came out of its banks due to heavy rains and several campsites, homes and farms were flooded. Local roads were covered with water as well. Flooding occurred near Stanley Lake at campsites as well. Flooding was reported of backcountry roads and campgrounds from Stanle…

Trees downed in Redfish Lake Area on power lines causing power outages.

Tree downed on a house in Challis with a reported 61 mph wind gust. Power was knocked out for 2 hours in the entire city of Challis.

The Morgan Creek area had several roads washed out by heavy rains.

Microburst winds estimated to be as high as 95 mph did extensive damage at the Redfish Lake campgrounds. Up to 1,000 Lodge-pole pine trees were uprooted with several snapped 3 to 5 feet above ground level. Twenty to forty Douglas Firs uprooted as well. The average diameter of the…

Fifty to 100 Lodge-pole pines were uprooted at the Stanley Lake Campground with an average diameter of 3 to 8 inches. No deaths or injuries were reported.

Fifty to 100 lodge-pole pines were uprooted at the Iron Creek Campground. The average diameter was 4 to 10 inches. No injuries were reported.

Power lines downed by thunderstorm winds just north of Mackay closing roads.

Three-quarter inch hail reported in Challis.

Rainfall of over 1 inch in less than one hour caused three mudslides along highway 75 in Challis.

One inch hail fell four miles east southeast of Mackay.