Illinois

Storm History: Hamilton County, Illinois

625 episodes, 662 events since 1957

Every storm the National Weather Service has filed in Hamilton 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
662
Deaths
1
Injuries
9
Damage
$18 million
Episodes
625

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 Hamilton 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 Fog10500
Winter Weather5800
Frost/Freeze5200$3.0 million
Hail5100$782,000
Heat5100
Strong Wind4900$58,000
Flash Flood4700$553,000
Tornado3909$9.4 million
Winter Storm3700$100,000
Thunderstorm Wind3410$598,000
Excessive Heat3300
Drought3000$3.5 million
Cold/Wind Chill2100
Heavy Snow1900
High Wind1100$14,000
Flood1000$460,000
Ice Storm600$10,000
Extreme Cold/Wind Chill400
Heavy Rain300
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 Hamilton County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Hamilton CountyEvery warning in Hamilton 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.