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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.

Flood$25K damage

Kootenai, ID · Jan 16, 2011

An unseasonably warm and wet period resulted in small stream and main stem river flooding. The Inland Northwest remained in the warm sector of a flat ridge with warm air advection into the region.

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Flash Flood

Lemhi, ID · Jun 29, 2013

Earlier in the day a surge of monsoon moisture tracked into the region from Nevada allowing for a good buildup of atmospheric moisture. A 40 knot west-southwest, mid-level jet maximum associated with an upper level wave combined with above normal moisture content (precipitable…

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Flash Flood

Lemhi, ID · Jun 29, 2013

Earlier in the day a surge of monsoon moisture tracked into the region from Nevada allowing for a good buildup of atmospheric moisture. A 40 knot west-southwest, mid-level jet maximum associated with an upper level wave combined with above normal moisture content (precipitable…

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Flood$50K damage

Benewah, ID · May 18, 2008

Unseasonably warm temperatures led significant mountain snow melt. This led to moderate flooding on the Coeur D'Alene and St. Joe Rivers in north Idaho. The Coeur D'Alene River at Cataldo crested at 45.96 feet at 9:45 AM PST on May 16th, where the flood stage is 43.0 feet.

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Flood$10K damage

Latah, ID · Mar 26, 2012

A 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.

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Flood$20K damage

Bonner, ID · Jul 1, 2011

Following a very wet April and May, warmer June temperatures began to melt an above normal mountain snowpack increasing flows into already swollen river basins.

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Flood$60K damage

Custer, ID · Jun 4, 2010

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.

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Flash Flood

Ada, ID · Aug 26, 2025

Monsoonal 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.

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Flash Flood

Boise, ID · Aug 26, 2025

Monsoonal 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.

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Flash Flood

Boise, ID · Aug 26, 2025

Monsoonal 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.

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Flood$15K damage

Shoshone, ID · Mar 30, 2011

A 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.

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Flood$15K damage

Benewah, ID · Jan 17, 2011

An unseasonably warm and wet period resulted in small stream and main stem river flooding. The Inland Northwest remained in the warm sector of a flat ridge with warm air advection into the region.

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Flash Flood$140K damage

Washington, ID · Jun 4, 2010

A deep low pressure system anchored in the Gulf of Alaska and a zonal flow pattern across the Pacific Northwest and Intermountain West provided the right ingredients for a sustained moisture plume which produced convection and periods of moderate to heavy rain over a three day…

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Flood

Kootenai, ID · Feb 23, 2025

A strong atmospheric river moved through the region on February 23-25. Many locations across the Lower Idaho Panhandle received rain amounts 1 to 2 inches over the period.

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Flood

Kootenai, ID · Feb 23, 2025

A strong atmospheric river moved through the region on February 23-25. Many locations across the Lower Idaho Panhandle received rain amounts 1 to 2 inches over the period.

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Flash Flood

Power, ID · Sep 3, 2013

The most significant flooding took place in Pocatello and Chubbuck in Bannock County, the second major flood in two weeks. Upwards of 4 to 5 inches of rain occurred in a localized area in Old Town and West Pocatello with more widespread 1 to 2 inch amounts north and east in…

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Flash Flood

Lemhi, ID · Sep 5, 2013

Strong rising air associated with the nose of a 50 knot mid-level south-southwest jet combined with near record high moisture levels and an unstable atmosphere triggered wet multicellular thunderstorms over Lemhi County by late afternoon on September 5th.

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Flood$20K damage

Idaho Palouse, ID · May 17, 1996

Due to extensive rainfall and warm temperatures, flooding took place at several locations. Damage occured on the Middle Fork of the Weiser river where sandbags were needed to protect a house.

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Flood$20K damage

Northern Panhandle, ID · May 17, 1996

Due to warm temperatures and excessive rainfall several rivers rose above flood stage causing flood damage during this period. The Middle Fork of the Weiser River caused damage and sandbags were needed to protect one home.

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Flood$20K damage

Idaho Palouse, ID · May 17, 1996

Due to warm temperatures and excessive rainfall several rivers rose above flood stage causing flood damage during this period. The Middle Fork of the Weiser River caused damage and sandbags were needed to protect one home.

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Flood$89K damage

Latah, ID · Jan 5, 2010

An estimated one inch of rain in combination with frozen ground let to rapid runoff into the Cow Creek Drainage, which went out of its banks and flooded portions of the east side of Genessee. One home reported having water underneath it in crawl spaces.

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Flood$10K damage

Bannock, ID · Jun 1, 2011

The Portneuf River at Pocatello remained above flood stage through June 18th. The river crested at 9.28 feet on June 11th. Extensive lowland flooding occurred near Inkom.

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Flood

Bingham, ID · Jun 1, 2011

The Snake River at Blackfoot was above flood stage from June 1st through June 19th. It was below flood stage from June 13th through June 16th. Water levels reached moderate flood stage and crested at 11.79 feet on the evening of June 10th.

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Flood$38K damage

Lincoln, ID · Jan 21, 2012

Several thousand dollars worth of damage due to flooding from extensive rainfall during the week. In Oneida County highways 36 and 38 damaged with mud and debris. Old Highway 191 near Malad Summit covered with mud and debris also.

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