Idaho

Storm History: Bonneville County, Idaho

350 episodes, 603 events since 1956

Every storm the National Weather Service has filed in Bonneville County, Idaho: 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
603
Deaths
11
Injuries
13
Damage
$42 million
Episodes
350

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 Bonneville 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 Storm13600$229,000
Thunderstorm Wind11410$73,000
High Wind9300$1.1 million
Hail6107$1.0 million
Heavy Snow4911$50,000
Winter Weather2122$36,000
Wildfire1900$100,000
Flash Flood1700$837,000
Tornado1601$32 million
Extreme Cold/Wind Chill1400
Flood1200$381,000
Dust Storm1100
Avalanche950
Heavy Rain800$6.0 million
Blizzard801$2,000
Lightning401$11,000
Funnel Cloud300
Dense Fog200$13,000
Heat200
Cold/Wind Chill110
Excessive Heat100
Freezing Fog110
Debris Flow100

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 Bonneville County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Bonneville CountyEvery warning in Bonneville County since 1986Every county in Idaho

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.