Debris Flow in Idaho

Events

76

Deaths

0

Injuries

0

Damage

$8.8 million

• Debris Flows and Flooding in Idaho, March 15 to 31, 2017$7.1 million · 6 eventsMarch 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.
• Debris Flows and Flooding in Idaho, April 1 to 20, 2011$2.5 million · 12 eventsA stationary trough of low pressure off the Pacific Northwest Coast steered a deep fetch of subtropical moisture into the Idaho Panhandle which persisted from the end of March through April 7th bringing several rounds of heavy rain.
• Debris Flows and Flooding in Idaho, March 28 to 31, 2012$1.8 million · 17 eventsA stagnant longwave pattern featuring a broad trough off the Pacific Northwest Coast and upper-level ridge over the Central US resulted in a parade of moist storm systems tracking through the Inland Northwest from March 28th through the 31st.
• Debris Flow and Flooding in Idaho, March 30 to 31, 2011$1.8 million · 6 eventsA stationary trough of low pressure off the Pacific Northwest Coast steered a deep fetch of subtropical moisture into the Idaho Panhandle which persisted from March 29th through early April.
• Debris Flows in Idaho, January 1, 2020$2.0 million · 2 eventsDuring the evening of January 1st a debris flow of rocks and mud cut a railroad line about 10 miles east of Bonners Ferry. A BNSF train was derailed with 3 locomotives and 6 rail cars being pushed into the Kootenai River with two engineers trapped inside.
• Debris Flow in Idaho, March 6 to 7, 2016$500,000 · 1 eventA very wet warm front brought near 24 hours of near steady rainfall to North Idaho. 24 hour rainfall totals generally varied one half inch to up to one and one half inches.
• Flash Flood and Debris Flow in Idaho, April 9 to 11, 2019$362,000 · 6 eventsBeginning on April 6th and continuing through April 10th a series of Pacific atmospheric rivers were directed into Oregon, southeast Washington and central Idaho saturating the ground with heavy rainfall.
• Tornado and Debris Flow in Idaho, April 3 to 30, 19978 injured · $100 · F0 · 14 eventsA strong Pacific storm system moved into Northern Idaho and dumped 5 inches of snow upon Sandpoint and Kellog.
• Debris Flow and Flooding in Idaho, March 15, 2012$250,000 · 3 eventsA Pacific storm system moving through the region resulted in heavy rain across the Northern Panhandle region. The warm and moist air mass likely resulted in some mid elevation snowmelt combining with the heavy rain to result in numerous flooding and debris flow reports.
• Debris Flow in Idaho, April 14, 2024$200,000 · 1 eventSlow moving thunderstorm brought heavy rain the area. Rain gages in the area were spotty but had storm total of 1.9 to 2.5 inches between 7 and 10 pm PDT. Radar estimated around half an inch of rain in the area.
• Debris Flow and Flooding in Idaho, March 26 to 27, 2012$153,000 · 5 eventsA negatively tilted upper-level trough lifting through the Inland NW on the evening of March 25th through the morning hours of the 26th tapped into subtropical moisture resulting in moderate to heavy convective rainfall for central portions of the Idaho Panhandle.
• Debris Flow in Idaho, July 3 to 10, 2020$180,000 · 1 eventHeavy rainfall at the end of June likely contributed to a rock slide that closed both lanes of US Route 95 south of Riggins, ID.
• Debris Flows in Idaho, April 7 to 15, 2017$152,000 · 4 eventsSaturated soil conditions across north Idaho caused by periodic heavy rain and melting snow during the month of March and into early April produced numerous debris flows and areas of small stream and field flooding.
• Debris Flow in Idaho, April 27, 2011$75,000 · 1 eventA wet spring resulted in saturated soils across northern Idaho. Recent heavy rainfall on the 25th and 26th of April was too much for a hillside along East Hayden Lake Road. Rainfall totals for the event ranged from three-quarters of an inch to an inch and a half across this area.
• Flash Flooding and Debris Flow in Idaho, June 1, 2015$16,000 · 50 kt wind · 17 eventsA trof of low pressure sweeping around the edge of a low pressure system moving north along the Oregon and Washington Coast produced numerous thunderstorms that moved across Eastern Washington and Northern Idaho.
• Debris Flow in Idaho, January 15 to 20, 2006$30,000 · 1 eventA rockslide occurred during the early morning hours of the 16th around two miles west of the town of Avery along the Saint Joe Road. Damage to the road was estimated to be around 30,00 dollars while it took road crews until the afternoon of the 20th to fix the road.
• Ice Storm and Debris Flows in Idaho, December 28 to 30, 2017$2,000 · 17 eventsA stationary front fed by a rich plume of Pacific moisture followed by the passage of a surface low pressure brought heavy snow to the mountains and valleys of north Idaho beginning on the 28th of December and continuing through the 30th.
• Debris Flow in Idaho, May 1, 2012$20,000 · 1 eventAn extremely wet March and April over the Northern Idaho Panhandle contributed to a large landslide down the steep terrain adjacent to Myrtle Creek in Boundary County. The slide caused extensive damage to Myrtle Creek Road, also known as Forest Road 633.
• Debris Flows in Idaho, April 11 to 12, 2023$15,000 · 2 eventsAt approximately 6:30 pm MDT on the 11th a mud slide necessitated the closure of SH-36 between Ovid and Preston. Continued warming temperatures resulted in two more slides in the area. As of 2:30 pm MDT on the 12th the highway remains closed north of Mink Creek.
• Debris Flow and Heavy Snow in Idaho, December 11 to 12, 2019$1,000 · 9 eventsDuring the evening of December 10th through the morning of December 12th a warm front and a following cold front passage delivered heavy snow accumulations to the mountains of north Idaho and the valleys of far north Idaho.
• Debris Flow and Damaging Wind in Idaho, September 16, 202458 kt wind · 8 eventsHeavy rain fell on burn scars from wildfires in the West Central Mountains caused debris flows on US Forest Service roads in the Payette National Forest.
• Debris Flow and Damaging Winds in Idaho, June 17, 199785 kt wind · 7 eventsDuring the evening of June 17, a severe thunderstorm developed over southeastern Oregon and crossed into southwest Idaho moving to the northeast. Numerous reports of severe winds and damages were received from spotters.
• Flash Flooding and Debris Flow in Idaho, August 13, 201471 kt wind · 6 eventsAn upper level low pressure system off the coast of Oregon moved slowly inland on the 13th leading to more severe weather across Southwest Idaho.
• Flash Flooding and Debris Flows in Idaho, August 26, 20256 eventsMonsoonal moisture surged into the region over a three day period, the most intense of which was the 26th. High atmospheric moisture content combined with weak flow in a monsoonal pattern to produce very moist storms moving very slowly.
• Debris Flow and Damaging Winds in Idaho, July 17, 199752 kt wind · 3 eventsDuring the late afternoon of July 17th, a severe thunderstorm formed over southeast Oregon and moved into southwest Idaho . In Payette County, the county sheriff reported large tree branches and power lines down.

Debris Flow everywhereEvery kind of event in Idaho

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24.