Montana

Storm History: Roosevelt County, Montana

590 episodes, 1,151 events since 1953

Every storm the National Weather Service has filed in Roosevelt 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
1,151
Deaths
4
Injuries
7
Damage
$15 million
Episodes
590

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 Roosevelt 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
Hail34401$6.3 million
Drought11100
Tornado11011$2.7 million
Flash Flood9700$431,000
High Wind8901$30,000
Dense Fog6700
Blizzard6200
Extreme Cold/Wind Chill5500
Winter Storm4400$387,000
Thunderstorm Wind4300$5,000
Cold/Wind Chill3820
Flood2700
Winter Weather2300
Heavy Snow1310
Ice Storm1004
Wildfire800$5.0 million
Heat400
Dust Storm300
Excessive Heat100
Funnel Cloud100
Freezing Fog100

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.

The strongest tornadoes

Every tornado in Roosevelt County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Roosevelt CountyEvery warning in Roosevelt 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.