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Idaho Flood Stories

189 first-hand accounts of flood events in Idaho, ranked by impact. Each is a NOAA-written narrative of the moment.

Flash Flood1 death

Cassia, ID · Jul 29, 1996

Heavy rain produced flash flooding with water 3 to 4 feet deep across the east bound lanes of Interstate 84 near mile marker 261. A driver rounded a corner and drove into the flooded area.

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Flood$100K damage

Kootenai, ID · Mar 5, 2014

The region was under a transitioning weather regime through the first week of March. March 1st came in dry and very cold under a modified Arctic air mass. This kept soil temperatures below freezing across much of the central to northern Idaho Panhandle.

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Flash Flood$1.0M damage

Ada, ID · Jun 6, 2023

Thunderstorms developed across southwest Idaho early Tuesday evening and produced |heavy rain and strong winds across portions of the Lower Treasure Valley, including the city of Boise.

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Flood$44.0M damage

Western Lemhi County, ID · Feb 8, 1996

Major flooding took place the second week of February in Northern Idaho. Conditions that developed in late January contributed significantly to the flood.

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Flood$1.5M damage

Caribou, ID · Jun 1, 2023

Extreme snowmelt from heavy snowfall and extreme flows on the Portneuf River caused damage to the Chesterfield Reservoir spillway. The old structure started to deconstruct and makeshift repairs were made to alleviate any significant flooding.

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Flood$100K damage

Madison, ID · Apr 10, 2023

The beginning of snowmelt caused some flooding and county roads to wash away east of Rexburg. Madison County closed two roads due to wash out and one due to two mud slides near each other. The mud slides occurred on 6000 East. The roads are in largely agricultural areas.

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Flood$6.0M damage

Idaho, ID · Apr 9, 2019

Moderate to heavy rainfall combined with snow melt contributed to flooding, mud-slides and road wash-outs and closures. More specifically, the South Fork of the Clearwater River saw an all-time record crest of 10.79 feet on the morning of April 9 which contributed to the town of…

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Flood$1.0M damage

Nez Perce, ID · Jun 12, 2022

Another trough system brought a round of slow moving stratiform slow moving showers. With the abundant amount of precipitation from earlier in the month, the streams and creeks were already near bank full.

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Flood$6.1M damage

Minidoka, ID · Feb 4, 2017

A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month.

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Flood$750K damage

Nez Perce, ID · Jun 12, 2022

Another trough system brought a round of slow moving stratiform slow moving showers. With the abundant amount of precipitation from earlier in the month, the streams and creeks were already near bank full.

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Flood$5.2M damage

Cassia, ID · Feb 4, 2017

A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month.

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Flood$1.3M damage

Madison, ID · Mar 14, 2018

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.

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Flood$2.0M damage

Bonner, ID · Mar 15, 2017

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.

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Flood$420K damage

Valley, ID · Apr 7, 2019

An Atmospheric River brought a persistent stream of moisture off the Pacific Ocean to West Central Idaho April 6-10. Rainfall totals of 2 to 5 inches were measured at many weather stations while snow melt added 1 to 3 inches of melt-water to the runoff.

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Flood$403K damage

Adams, ID · Apr 7, 2019

An Atmospheric River brought a persistent stream of moisture off the Pacific Ocean to West Central Idaho April 6-10. Rainfall totals of 2 to 5 inches were measured at many weather stations while snow melt added 1 to 3 inches of melt-water to the runoff.

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Flood

Clark, ID · Dec 24, 2025

Medicine Lodge Creed near Small went into flood stage around 950 PM on the 24th and reached an all time record at 1230 AM on the 25th and didn't drop below flood stage until 545 AM on the 25th. Two road washouts occurred.

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Flood$2.4M damage

Jefferson, ID · Feb 5, 2017

A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month.

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Flood$680K damage

Clark, ID · Mar 13, 2018

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.

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Flood$2.1M damage

Lincoln, ID · Feb 5, 2017

A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month.

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Flash Flood$200K damage

Latah, ID · Apr 9, 2019

Beginning 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.

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Flood$1.7M damage

Franklin, ID · Feb 5, 2017

A trend toward above normal temperatures in February after extreme snowfall amounts in both December and January led to extensive flooding issues during the entirety of the month.

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Flood$800K damage

Latah, ID · Mar 15, 2017

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.

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Flood$20K damage

Bonner, ID · Dec 10, 2025

An atmospheric river brought heavy rains to the Central Idaho Panhandle December 10 and 11. Areas saw 48 hour rain amounts of 2 to 4 inches. The rain combined with snow melt and led to several flooding and landslide incidents.

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Flood$20K damage

Shoshone, ID · Dec 10, 2025

An atmospheric river brought heavy rains to the Central Idaho Panhandle December 10 and 11. Areas saw 48 hour rain amounts of 2 to 4 inches. The rain combined with snow melt and led to several flooding and landslide incidents.

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