Iowa

Storm History: Dallas County, Iowa

583 episodes, 1,181 events since 1955

Every storm the National Weather Service has filed in Dallas 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
1,181
Deaths
0
Injuries
9
Damage
$181 million
Episodes
583

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 Dallas 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
Tornado38605$15 million
Hail22901$2.3 million
Flash Flood21300$5.1 million
Flood11403$33 million
Thunderstorm Wind4200$349,000
Winter Storm3000$575,000
High Wind2800$935,000
Drought2500$110 million
Heavy Snow2400$6.9 million
Blizzard2100$900,000
Heavy Rain1300
Ice Storm1200$848,000
Extreme Cold/Wind Chill1000
Frost/Freeze900$4.0 million
Funnel Cloud800
Cold/Wind Chill700$294,000
Winter Weather300
Lightning300$37,000
Excessive Heat300$135,000
Heat100

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 Dallas County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Dallas CountyEvery warning in Dallas 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.