Iowa

Storm History: Story County, Iowa

574 episodes, 1,320 events since 1950

Every storm the National Weather Service has filed in Story County, Iowa: 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
1,320
Deaths
1
Injuries
34
Damage
$252 million
Episodes
574

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 Story 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
Tornado398128$94 million
Hail34801$4.0 million
Flash Flood22000$7.9 million
Flood8400$28 million
Thunderstorm Wind5203$1.4 million
High Wind3602$1.4 million
Winter Storm2800$756,000
Blizzard2700$660,000
Drought2700$106 million
Heavy Snow2500$3.5 million
Heavy Rain2300
Ice Storm1200$293,000
Extreme Cold/Wind Chill1100
Frost/Freeze900$4.0 million
Cold/Wind Chill700$294,000
Funnel Cloud500
Winter Weather300
Excessive Heat300$135,000
Heat100
Lightning100$5,000

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 Story County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Story CountyEvery warning in Story County since 1986Every county in Iowa

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.