Boulder County, Colorado
Tornadoes, hail, floods and severe storms recorded here between 1953 and 2025, from NOAA's Storm Events Database. Search an address to see which tornadoes came closest to it.
11
Tornado reports
356
Hail reports
36
Floods since 1996
513
All events
6
Deaths
$299.4M
Property damage
Tornado paths in Boulder County
The part of each tornado’s path NOAA recorded in this county, 11 in all. Zoom in and the paths widen to their surveyed width.
EF0EF1EF2EF3EF4EF5Unrated
Year by year
All storm eventsTornadoes
NOAA's storm database records tornadoes back to 1950 and hail and thunderstorm wind back to 1955, but floods only from 1996 on. Older floods are missing here. For those, the U.S. Geological Survey's stream gauge records and flood reports are the place to look.
Most significant events
The strongest tornadoes, deadliest events and biggest damage here, up to 50.
Tornado EF3 Tornado
The tornado first touched about 3 miles south of Berthoud, and then tracked to the west/northwest and lifted about 6 miles southwest of Berthoud. The majority of the damage was EF1, with some areas of EF2, and a few small areas of EF3. At least 25 homes between Longmont and Berth…
Two hikers were struck by lightning on Bear Peak off the Bear Peak Trail. The male hiker sustained a direct lightning strike and died later at the hospitail. The female hike sustained minor injuries from an indirect strike.
In Boulder, Old Tale Road at McSorley was closed due to debris and downed trees. Debris forced the partial closure of 3rd Street and Canyon and the Eastbound lane of Baseline Road near Foothills Parkway. Flooding was also reported at: 9th and Alpine, 9th and Balsam and South Boul…
In Boulder, many vehicles were abandoned near Lookout Road and Spine due to floodwaters. Significant flooding was reported at the Justice Center; the Juvenile Detention Center had to be evacuated to the second floor. Floodwaters to a depth of 2 feet inundated Hawthorne Street in …
A climber was struck and killed by lightning as he and a companion were ascending a sheer rock face, near the summit of Longs Peak. Lightning struck the victim, who was using climbing ropes and a harness, killing him instantly. His friend was not injured.
Heavy rain, ranging from 6 to 18 inches through the storm event, caused widespread flooding along the entire drainage systems of Boulder and St. Vrain Creeks. Three vehicles were partially submerged when floodwaters undercut Dillon Road near CO287, between Lafayette and Broomfiel…
Hail Hail
The report was from mPING.
Hail Hail
The report was from mPING.
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The report was from mPING.
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The report was from mPING.
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Report from mping.
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Report from mping.
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Report from mping.
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Report from Mping.
Hail Hail
Picture of 1 inch hail on Twitter.
Thunderstorm Wind Thunderstorm Wind
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Size was estimated.
Hail Hail
The report was from mping.
Hail Hail
The report was from mping.
Hail Hail
The report was from mping.
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The report was via mping.
Thunderstorm Wind Thunderstorm Wind
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Flash Flood Flash Flood
Localized flash flooding reported from Geer Canyon to Left Hand Canyon to CO36.
Flash Flood Flash Flood
Heavy rain caused localized flash flooding in Erie. Standing water stranded vehicles at the Intersection of Highway 7 and Mountain View Blvd. A couple of basements also flooded.
Flash Flood Flash Flood
Heavy rain produced flash flooding in Geer Canyon in the Calwood burn area.
Hail Hail
Events by year, as a table
| Year | Events | Tornadoes |
|---|---|---|
| 2025 | 16 | 0 |
| 2024 | 8 | 0 |
| 2023 | 10 | 0 |
| 2022 | 5 | 0 |
| 2021 | 5 | 0 |
| 2020 | 4 | 0 |
| 2019 | 46 | 0 |
| 2018 | 47 | 0 |
| 2017 | 3 | 0 |
| 2016 | 1 | 0 |
| 2015 | 13 | 1 |
| 2014 | 7 | 0 |
| 2013 | 26 | 0 |
| 2012 | 6 | 0 |
| 2011 | 7 | 0 |
| 2010 | 14 | 0 |
| 2009 | 20 | 0 |
| 2008 | 6 | 0 |
| 2007 | 16 | 0 |
| 2006 | 12 | 0 |
| 2005 | 16 | 0 |
| 2004 | 20 | 0 |
| 2003 | 7 | 0 |
| 2002 | 3 | 0 |
| 2001 | 4 | 0 |
| 2000 | 11 | 0 |
| 1999 | 3 | 0 |
| 1998 | 5 | 0 |
| 1997 | 20 | 1 |
| 1996 | 24 | 2 |
| 1995 | 5 | 0 |
| 1994 | 18 | 0 |
| 1993 | 5 | 0 |
| 1992 | 3 | 0 |
| 1991 | 7 | 0 |
| 1990 | 5 | 1 |
| 1989 | 8 | 0 |
| 1988 | 2 | 1 |
| 1987 | 5 | 0 |
| 1986 | 5 | 0 |
| 1985 | 2 | 0 |
| 1984 | 2 | 0 |
| 1983 | 10 | 0 |
| 1982 | 7 | 0 |
| 1981 | 7 | 0 |
| 1980 | 5 | 2 |
| 1979 | 3 | 0 |
| 1978 | 1 | 1 |
| 1977 | 2 | 0 |
| 1975 | 1 | 0 |
| 1974 | 1 | 0 |
| 1973 | 4 | 0 |
| 1972 | 1 | 0 |
| 1971 | 1 | 0 |
| 1970 | 1 | 0 |
| 1969 | 1 | 0 |
| 1967 | 5 | 0 |
| 1966 | 2 | 0 |
| 1964 | 1 | 0 |
| 1962 | 4 | 0 |
| 1958 | 1 | 0 |
| 1957 | 1 | 0 |
| 1955 | 1 | 1 |
| 1953 | 1 | 1 |
Search your address
See every tornado that passed within 25 miles of a place in Boulder County, measured to its path.
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