Boulder, CO Tornado History — 72 Tornadoes Since 1950
How many tornadoes has Boulder, CO had?
Boulder has had 72 tornadoes on record within 25 miles since 1950, including 1 strong to violent (EF3+) tornado.
When was the most recent tornado near Boulder?
The most recent tornado within 25 miles of Boulder was an EF2 on June 7, 2021.
When is tornado season in Boulder?
June is historically the peak month for tornadoes near Boulder, with 31 on record. April through June account for 48 of the 72 tornadoes on record near Boulder.
At a Glance
Recent Tornado Activity Near Boulder
The last 20 years of confirmed tornadoes within 25 miles — 11 total, averaging 0.6 per year over this window.
Preliminary tornado reports near Boulder since December 29, 2025
This is a preliminary report, not confirmed tornadoes. It has not yet been through an NWS damage survey, and is not counted in the confirmed totals above.
Preliminary reports are revised, merged, and sometimes withdrawn — historically about 23% are consolidated downward once surveys complete. Ratings are omitted until a survey assigns one.
Confirmed records above are complete through December 29, 2025. NOAA publishes the confirmed archive annually, so tornadoes after that date appear here first and move into the totals above once finalized.
[Landspout] Reports including a photo of a landspout approximately a mile to the north of Dicks Sporting Goods Park. Lasted approximately 7 minutes. Location estimated (BOU)
Within 25 miles of Boulder. Quoted text is the report narrative exactly as filed. Source: NOAA Storm Prediction Center preliminary storm reports, updated daily.
Tornadoes by Decade
Tornadoes by Enhanced Fujita Rating
F0–F5 ratings (pre-2007) are grouped with their EF equivalents. The Enhanced Fujita scale replaced the original Fujita scale in February 2007.
Tornadoes by Month
Have any tornadoes near Boulder been fatal?
No fatalities are on record within 25 miles of Boulder from any of the 72 tornadoes since 1950, though 49 injuries have been reported, according to NOAA Storm Prediction Center records.
Notable Tornadoes Near Boulder
What the record shows near Boulder
The 1990s were the busiest decade near Boulder, with 21 of the 72 confirmed tornadoes within 25 miles; the 2020s have produced 1 so far. The Boulder record runs from the 1950s to today.
Of the tornadoes rated near Boulder, 65 reached EF0 or EF1 and 7 reached EF2 or stronger. The most intense on record near Boulder is rated EF3, of which 1 is logged.
Across the last 20 years Boulder has averaged 0.6 confirmed tornadoes a year within 25 miles, 11 in total. 2009 was the busiest of them with 3, and 13 of those years passed with none at all.