Illinois

Storm History: Boone County, Illinois

327 episodes, 419 events since 1959

Every storm the National Weather Service has filed in Boone County, Illinois: 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
419
Deaths
26
Injuries
454
Damage
$8.3 million
Episodes
327

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 Boone 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
Tornado8125454$7.3 million
Hail6110$302,000
Flash Flood5700$537,000
Thunderstorm Wind5400$117,000
Winter Storm4000
Flood2500
Drought2200
High Wind1300$50,000
Extreme Cold/Wind Chill1300
Winter Weather1200
Cold/Wind Chill900
Ice Storm900
Heavy Snow800
Excessive Heat700
Blizzard500
Strong Wind100
Frost/Freeze100
Heat100

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 Boone County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Boone CountyEvery warning in Boone County since 1986Every county in Illinois

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.