Montana

Storm History: Missoula County, Montana

747 episodes, 1,530 events since 1957

Every storm the National Weather Service has filed in Missoula County, Montana: floods, hail, damaging wind, tornadoes, winter storms, heat and the rest, with the most serious on record. Events filed by forecast zone count for every county the zone covers.

The record

Events
1,530
Deaths
42
Injuries
105
Damage
$16 million
Episodes
747

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

Open the live radar over Missoula County

Every year

From 1996 the record holds 48 kinds of event with each office’s narrative; before that, tornadoes, hail and thunderstorm wind only, and before 1955 tornadoes alone.

By kind of event

Counted under the kind that heads each episode.

Kind of eventEventsDeathsInjuriesDamage
Heavy Snow44226$1.3 million
Winter Storm3991822$496,000
Hail15601$1.7 million
High Wind9601$1.4 million
Winter Weather93717$62,000
Thunderstorm Wind6612$5.8 million
Blizzard5224$399,000
Extreme Cold/Wind Chill3501$2,000
Flood3300$3.3 million
Ice Storm3320
Frost/Freeze2300
Cold/Wind Chill1810
Wildfire1403$588,000
Strong Wind1200$1.0 million
Flash Flood1100$27,000
Tornado1000$30
Avalanche8534
Excessive Heat700
Heavy Rain600$5,000
Debris Flow400$35,000
Heat400
Dust Devil200$40,000
Dense Fog225$70,000
Lightning111
Dust Storm118
Funnel Cloud100
Freezing Fog100$50,000

The deadliest

The costliest

Damage within this county, in the dollars of its year.

The largest hail

The largest stone in each episode, which may have fallen in a neighboring county of the same episode.

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Missoula CountyEvery warning in Missoula County since 1986Every county in Montana

Sources

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.