Boulder County tornado history

11 tornadoes touched Boulder County, Colorado between 1950 and 2025 — about 0.1 a year. The strongest was rated EF3 (Jun 4, 2015).

11tornadoes since 1950
EF3strongest rating
0killed · 0 injured
6.7 milongest path · 2015
(E)F0(E)F1(E)F2(E)F3(E)F4(E)F5· dots = start point only

By rating

(E)F02
(E)F16
(E)F22
(E)F31
(E)F40
(E)F50

By month

JFMAMJJASOND

Peak month: June.

By decade

’50’60’70’80’90’00’10’20

Strongest tornadoes

DateRatingPathWidthInjuredKilled
Jun 4, 2015EF36.7 mi440 yd00
Oct 15, 1980F21.5 mi50 yd00
Jun 5, 1988F20.5 mi50 yd00
Apr 30, 1980F15.7 mi20 yd00
Jun 16, 1996F11.5 mi300 yd00
May 17, 1978F10.5 mi17 yd00
Sep 17, 1953F10.1 mi50 yd00
May 12, 1955F10.1 mi150 yd00
Jun 6, 1997F10.1 mi50 yd00
Jun 1, 1990F00.2 mi20 yd00
Jul 12, 1996F00.1 mi50 yd00

Most recent tornadoes

DateRatingPathWidthInjuredKilled
Jun 4, 2015EF36.7 mi440 yd00
Jun 6, 1997F10.1 mi50 yd00
Jul 12, 1996F00.1 mi50 yd00
Jun 16, 1996F11.5 mi300 yd00
Jun 1, 1990F00.2 mi20 yd00
Jun 5, 1988F20.5 mi50 yd00
Oct 15, 1980F21.5 mi50 yd00
Apr 30, 1980F15.7 mi20 yd00
May 17, 1978F10.5 mi17 yd00
May 12, 1955F10.1 mi150 yd00
Sep 17, 1953F10.1 mi50 yd00

Nearby counties

Clear Creek County, CO2Denver County, CO20Jefferson County, CO12Grand County, CO1Larimer County, CO33Adams County, CO190Douglas County, CO64Weld County, CO285

Questions

How many tornadoes has Boulder County, Colorado had?

11 tornadoes touched Boulder County, Colorado between 1950 and 2025 in the NOAA Storm Prediction Center database — about 0.1 per year.

What was the strongest tornado in Boulder County?

The strongest rating recorded was EF3 on Jun 4, 2015, with a 6.7-mile path.

When is tornado season in Boulder County?

Most of its tornadoes happened in June (5 of 11). Tornadoes can occur in any month, so keep alerts on year-round.

Right now: live tornado warnings map · alerts for your location. Dates link to that day’s full storm reports where available (2004 onward).