Montana

Storm History: Sanders County, Montana

608 episodes, 1,122 events since 1956

Every storm the National Weather Service has filed in Sanders 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
1,122
Deaths
30
Injuries
50
Damage
$18 million
Episodes
608

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 Sanders 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 Storm3411314$6.7 million
Heavy Snow33946$545,000
High Wind9113$3.9 million
Winter Weather91818$7,000
Blizzard3812$210,000
Hail3600$27,000
Extreme Cold/Wind Chill3401
Frost/Freeze2500
Flood2300$3.2 million
Ice Storm2000$30,000
Cold/Wind Chill1510$1,000
Thunderstorm Wind1401$88,000
Strong Wind1200$77,000
Avalanche700$9,000
Tornado600
Excessive Heat600
Wildfire500$10,000
Debris Flow500$900
Heat500
Flash Flood400$3.6 million
Dense Fog225$70,000
Heavy Rain200$5,000
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 Sanders CountyEvery warning in Sanders 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.