Iowa

Storm History: Clay County, Iowa

731 episodes, 1,017 events since 1954

Every storm the National Weather Service has filed in Clay 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
1,017
Deaths
2
Injuries
6
Damage
$90 million
Episodes
731

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 Clay 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
Hail24801$33 million
Flood16810$30 million
Tornado14500$7.3 million
Winter Weather7510
Thunderstorm Wind7200$717,000
Flash Flood4800$136,000
Winter Storm4700$10 million
Drought4600$7.4 million
Blizzard4404$63,000
High Wind3500$742,000
Excessive Heat2000
Cold/Wind Chill1700
Extreme Cold/Wind Chill1600
Heavy Snow1500
Ice Storm900
Heat400
Strong Wind400
Wildfire301$15,000
Lightning100$10,000

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 Clay County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Clay CountyEvery warning in Clay 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.