Iowa

Storm History: Osceola County, Iowa

502 episodes, 607 events since 1958

Every storm the National Weather Service has filed in Osceola 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
607
Deaths
0
Injuries
15
Damage
$40 million
Episodes
502

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 Osceola 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
Hail13800$2.4 million
Winter Weather8200
Tornado79014$15 million
Winter Storm4500$10 million
Blizzard4201$28,000
Thunderstorm Wind4000$381,000
Drought3900$3.9 million
High Wind3200$127,000
Excessive Heat2100
Cold/Wind Chill1900
Heavy Snow1900
Extreme Cold/Wind Chill1500
Ice Storm1100$172,000
Flood700$8.3 million
Flash Flood700
Heat400
Wildfire300
Strong Wind300
Lightning100$75,000

The deadliest

None recorded.

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 Osceola County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Osceola CountyEvery warning in Osceola 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.