North Dakota

Storm History: Mercer County, North Dakota

385 episodes, 528 events since 1956

Every storm the National Weather Service has filed in Mercer County, North Dakota: 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
528
Deaths
0
Injuries
8
Damage
$18 million
Episodes
385

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 Mercer 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
Tornado14604$5.8 million
Hail13300$1.4 million
Blizzard4903$3.5 million
High Wind4500$102,000
Thunderstorm Wind3000$23,000
Winter Storm2900$30,000
Heavy Snow2000
Extreme Cold/Wind Chill2000
Flash Flood1900$4.1 million
Drought1200
Cold/Wind Chill800
Flood701$2.6 million
Winter Weather300
Funnel Cloud200
Lightning100$5,000
Excessive Heat100
Wildfire100
Dense Smoke100
Dust Storm100

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 Mercer County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Mercer CountyEvery warning in Mercer County since 1986Every county in North Dakota

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.