Montana

Storm History: Flathead County, Montana

700 episodes, 1,304 events since 1955

Every storm the National Weather Service has filed in Flathead 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
1,304
Deaths
30
Injuries
41
Damage
$35 million
Episodes
700

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 Flathead 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
Winter Storm35387$12 million
Heavy Snow33044$489,000
Hail12700$2.3 million
High Wind10513$4.0 million
Winter Weather85615$7,000
Extreme Cold/Wind Chill4500
Blizzard4412$210,000
Thunderstorm Wind4115$1.7 million
Flood3430$2.4 million
Frost/Freeze2100
Strong Wind1920$84,000
Ice Storm1700$30,000
Cold/Wind Chill1600$1,000
Tornado1200$308,000
Avalanche1241$5,000
Flash Flood1200$11 million
Debris Flow802$900
Heavy Rain600
Excessive Heat500
Wildfire300
Heat300
Lightning202$1,000
Funnel Cloud200
Dense Fog100
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.

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Flathead CountyEvery warning in Flathead 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.