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Montana Flood Stories

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

Flash Flood$25K damage

Fergus, MT · Jun 7, 2023

Several rounds of rain and thunderstorms affected much of Montana during the first half of June. Flash flooding occurred across portions of the region, especially across Fergus County as well as the Rocky Mountains.

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Flood$250K damage

Teton, MT · Jan 15, 2020

A prolonged period of single digit and sub-zero temperatures caused large areas of anchor ice developed on the Spring Creek in the northeastern section of Choteau, which caused up to a couple of feet flood water to enter parts of a nearby residential area and a section of…

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Flash Flood$700K damage

Lewis And Clark, MT · Jul 3, 2022

Low pressure along the west coast spread deeper moisture increasing the chances for showers and thunderstorms across the region through Independence Day.

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Flash Flood$100K damage

Jefferson, MT · Jun 27, 2023

An unstable airmass with a minor weather disturbance resulted in afternoon showers and thunderstorms, with locally severe weather occurring. Isolated locations also experienced flooding, such as portions of Jefferson County where Milligan Canyon Road was washed out in several…

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Flood$10K damage

Fergus, MT · Jun 2, 2023

June began with river flooding along Clear Creek near Chinook, which reached Major Flood Stage for the second time this spring. In fact, Clear Creek recorded its third highest crest on record, as of writing.

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Flash Flood$685K damage

Deer Lodge, MT · Jul 15, 2017

An upper level wave tracked up from the Clearwater Mountains of Idaho towards the Seeley Lake area and initiated thunderstorms thanks to warmer than normal temperatures in the region.

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Flood$1.1M damage

Valley, MT · Aug 24, 2014

A very wet and slow-moving low pressure system stalled over Montana and directed near-continuous rainfall over central and northeastern portions of the state for several days.

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Flood$6.0M damage

Musselshell, MT · May 23, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$515K damage

Petroleum, MT · Aug 23, 2014

A very wet and slow-moving low pressure system stalled over Montana and directed near-continuous rainfall over central and northeastern portions of the state for several days.

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Flood$4.0M damage

Big Horn, MT · May 21, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$4.0M damage

Sweet Grass, MT · May 20, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$2.0M damage

Stillwater, MT · May 20, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$35K damage

Flathead, MT · May 22, 2016

A slow moving closed low pressure system tracked from Oregon north and east across northwest Montana into southern Alberta from May 21st to May 22nd.

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Flash Flood$2.7M damage

Yellowstone, MT · Jun 20, 2010

Meteorologically speaking, this was a very active severe weather day for south central Montana. A very moist and unstable atmosphere was in place across portions of the Billings Forecast area during the afternoon and evening of the 20th (Father's Day).

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Flood$1.1M damage

Custer, MT · May 20, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$1.3M damage

Missoula / Bitterroot Valleys, MT · Mar 11, 1996

A rapid warming of temperatures, after an extended cold, snowy period, caused ice jams and flooding problems across north central Montana. Many small streams went out of their banks, washing out numerous roads.

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Flood$912K damage

Flathead/mission Valleys, MT · May 1, 1997

Snowmelt flooding caused numerous road closures and road washouts throughout the region. In Flathead County, at least three road washouts were reported and one bridge damaged.

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Flood$375K damage

Fallon, MT · May 20, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$50K damage

Granite, MT · Jun 13, 2017

A closed low pressure system brought widespread heavy precipitation amounts of 1-3��� across portions of western Montana. The combination of heavy rain and continued high elevation snow melt caused rapid rises on small streams and creeks, especially around Georgetown…

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Flood$726K damage

Missoula/bitterroot Valleys, MT · May 1, 1997

Snowmelt flooding caused numerous road closures and road washouts throughout the region. In Flathead County, at least three road washouts were reported and one bridge damaged.

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Flood$700K damage

Lower Clark Fork Region, MT · Feb 7, 1996

Warmer temperatures, after an extended cold and snowy period, caused numerous flooding problems across central Montana during the second week of February. Snowmelt over frozen ground caused streams and rivers to go out of their banks, washing out roads and bridges.

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Flood$700K damage

Flathead/mission Valleys, MT · Jun 2, 2005

Three days of moderate to heavy rain on top of snow pack in the Mission and Swan Mountains caused small creeks to flood with mud and debris flows causing damage. Total rainfall amounts ranged from 2.50 inches in the valleys, and 4 to 7 inches over higher terrain in Lake County.

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Flood$320K damage

Carter, MT · May 20, 2011

A Pacific low moved into the four corners region on the 17th and migrated northeast into the Dakotas through the 22nd, bringing another round of heavy precipitation aided by a tap of Gulf of Mexico moisture.

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Flood$543K damage

Kootenai/cabinet Region, MT · May 1, 1997

Snowmelt flooding caused numerous road closures and road washouts throughout the region. In Flathead County, at least three road washouts were reported and one bridge damaged.

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