Illinois

Storm History: Jefferson County, Illinois

744 episodes, 827 events since 1955

Every storm the National Weather Service has filed in Jefferson 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
827
Deaths
11
Injuries
79
Damage
$36 million
Episodes
744

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 Jefferson 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
Tornado100357$14 million
Hail9900$250,000
Dense Fog9900
Thunderstorm Wind6516$14 million
Winter Weather6531$4,000
Frost/Freeze5700$3.0 million
Flash Flood5211$556,000
Heat5105
Strong Wind5101$69,000
Winter Storm3900$230,000
Excessive Heat3107
Drought2700$3.5 million
Cold/Wind Chill2010
Heavy Snow2001$50,000
Flood1720$141,000
High Wind1000$27,000
Heavy Rain900$2,000
Ice Storm600$40,000
Extreme Cold/Wind Chill400
Lightning300$70,000
Freezing Fog100
Dust Storm100$1,000

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 Jefferson County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Jefferson CountyEvery warning in Jefferson 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.