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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

Sweet Grass, MT · Jun 6, 2023

A very moist, easterly surface flow advected 50 to 60 degree dewpoints from the central plains into the Billings Forecast Area. In addition, atmospheric precipitable waters were well over 1.00. Steering winds were light resulting in slow-moving thunderstorms.

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Flash Flood

Stillwater, MT · Jun 6, 2023

A very moist, easterly surface flow advected 50 to 60 degree dewpoints from the central plains into the Billings Forecast Area. In addition, atmospheric precipitable waters were well over 1.00. Steering winds were light resulting in slow-moving thunderstorms.

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Flash Flood

Stillwater, MT · Jun 6, 2023

A very moist, easterly surface flow advected 50 to 60 degree dewpoints from the central plains into the Billings Forecast Area. In addition, atmospheric precipitable waters were well over 1.00. Steering winds were light resulting in slow-moving thunderstorms.

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Flash Flood$20K damage

Flathead, MT · Jul 19, 2004

Early morning heavy rain soaked Kalispell with several business and basements reported flooded. An underpass in Kalispell was flooded with 4 feet of water. Later that afternoon a round of severe thunderstorms hit western montana producing hail and heavy rains.

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Flood

Cascade, MT · Jul 23, 2020

Southwesterly flow and associated shortwave energy streaming ahead of a Pacific Northwest trough brought thunderstorms with heavy rain and gusty winds to Southwest and portions of Central/North-central Montana on Thursday July 23rd.

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Flood

Lewis And Clark, MT · Jun 30, 2020

Much of central MT has already seen 1 to 2 of precipitation with locally higher amounts in central/northern Lewis and Clark County. An additional 0.5 to 1 of rainfall likely for the western portions of central Montana.

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Flood

Madison, MT · Jun 19, 2020

Recent rainfall combined with melting snow raises river levels for some central and southern rivers. Overall limited impacts expected; however, The Big Hole River near Melrose experiences a little more upstream water flowing into it.

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Flash Flood

Granite, MT · Aug 9, 2013

A wave of monsoon moisture tracked south to north across western Montana on August 9, 2013. Embedded multicellular thunderstorms produced very heavy rain with flash flooding reported near Drummond and gusty winds that brought tree damage to portions of the Bitterroot and…

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Flash Flood

Valley, MT · Jul 12, 2024

A storm rapidly developed in Saskatchewan, turned right and tracked southeastward into Montana. The storm spawned a couple other storms that would track east-southeast across Montana counties that border Canada.

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Flood

Flathead, MT · Jun 12, 2022

Periods of convective and upslope precipitation brought areal and river flooding June 11 through June 16. Rainfall of 2 to 6 inches was common for the lower elevations of Northwest Montana between June 11 and June 15.

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Flood

Missoula, MT · Jun 12, 2022

Periods of convective and upslope precipitation brought areal and river flooding June 11 through June 16. Rainfall of 2 to 6 inches was common for the lower elevations of Northwest Montana between June 11 and June 15.

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Flood

Missoula, MT · Jun 12, 2022

Periods of convective and upslope precipitation brought areal and river flooding June 11 through June 16. Rainfall of 2 to 6 inches was common for the lower elevations of Northwest Montana between June 11 and June 15.

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Flood

Lincoln, MT · Jun 14, 2022

Periods of convective and upslope precipitation brought areal and river flooding June 11 through June 16. Rainfall of 2 to 6 inches was common for the lower elevations of Northwest Montana between June 11 and June 15.

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Flood$30K damage

Daniels, MT · Mar 15, 1999

Rapidly melting snow pack caused area creeks and streams to overflow their banks. Some road damage including a few road washouts and closures were a result.

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Flash Flood

Richland, MT · May 27, 2023

A large area of thunderstorms moved up into our area from southeastern Montana. Although the far southern area was under a Severe Thunderstorm Watch, no severe storms occurred over our region.

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Flash Flood

Cascade, MT · Jul 6, 2019

A surface trough built in from the north from the Great Basin into the Northern Rockies, while southeasterly winds at the surface brought in low level moisture into the region. Pacific moisture increased in the upper levels as an approaching trough.

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Flash Flood

Cascade, MT · Aug 21, 2019

On august 21st, an upper level trough over the Pacific Northwest ushered a moist and unstable southwest flow into the region, while much of North-central Montana was situated on the northeast side of a stationary front, where unusually strong easterly surface winds pumped in low…

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Flood

Judith Basin, MT · May 27, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Teton, MT · May 26, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Glacier, MT · May 26, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Cascade, MT · May 27, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Lewis And Clark, MT · May 26, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Chouteau, MT · May 29, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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Flood

Meagher, MT · May 27, 2019

A slow-moving low pressure system was accompanied by unusually-high amounts of moisture, periods of steady of heavy rain, and some thunderstorms over north-central Montana during May 25th through the early morning of the 28th.

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