Iowa

Storm History: Plymouth County, Iowa

719 episodes, 1,017 events since 1951

Every storm the National Weather Service has filed in Plymouth 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
4
Injuries
13
Damage
$79 million
Episodes
719

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 Plymouth 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
Hail27903$5.9 million
Tornado19205$17 million
Flood11300$8.3 million
Thunderstorm Wind7302$486,000
Winter Weather6800
Drought6100$47 million
Flash Flood5000$71,000
Blizzard3811$33,000
Winter Storm3620
High Wind2900$75,000
Excessive Heat2200
Heavy Snow1500
Cold/Wind Chill1000
Extreme Cold/Wind Chill1000
Ice Storm812$210,000
Heat600
Strong Wind300
Wildfire200
Funnel Cloud100
Lightning100$15,000

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 Plymouth County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Plymouth CountyEvery warning in Plymouth 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.