Illinois

Storm History: Union County, Illinois

728 episodes, 773 events since 1955

Every storm the National Weather Service has filed in Union 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
773
Deaths
8
Injuries
52
Damage
$20 million
Episodes
728

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 Union 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
Dense Fog10900
Strong Wind8120$97,000
Tornado63113$7.0 million
Hail61020$269,000
Frost/Freeze5500$30,000
Heat54116
Thunderstorm Wind5112$1.0 million
Winter Weather4900
Flood4300$4.2 million
Winter Storm3911$1.3 million
Flash Flood3420$707,000
Excessive Heat3400
Drought3300$3.5 million
Heavy Snow2000$25,000
Cold/Wind Chill1900
High Wind1000$1.5 million
Ice Storm600$160,000
Extreme Cold/Wind Chill400
Heavy Rain300
Freezing Fog200
Funnel Cloud100
Lightning100$20,000
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 Union County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Union CountyEvery warning in Union 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.