Colorado

Storm History: Jefferson County, Colorado

1,017 episodes, 1,870 events since 1960

Every storm the National Weather Service has filed in Jefferson County, Colorado: 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
1,870
Deaths
39
Injuries
220
Damage
$4.9 billion
Episodes
1,017

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 Jefferson 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
Winter Storm39424
High Wind311319$26 million
Hail27514$132,000
Tornado2651150$353 million
Heavy Snow18700
Winter Weather14003
Flash Flood10533$2.4 billion
Blizzard5900$31 million
Thunderstorm Wind3000
Avalanche292014
Wildfire17712$2.1 billion
Lightning16210$1.3 million
Drought1000
Strong Wind701$20,000
Flood600$25,000
Extreme Cold/Wind Chill600
Cold/Wind Chill600
Dust Storm300
Funnel Cloud200
Frost/Freeze100
Dust Devil100$5,000

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 Jefferson County, with its track

Every episode, newest first

Earlier years, state by state:

More

Tornadoes in Jefferson CountyEvery warning in Jefferson County since 1986Every county in Colorado

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.