Boulder weather alerts

There are no active weather alerts for Boulder, CO right now.

The National Weather Service issues alerts for Boulder as part of Boulder County.

Updated 11:01 AM MST from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS

Map data: NWS, OpenFreeMap, OpenStreetMap

Tornado history within 25 miles of Boulder

82 tornadoes have been recorded within 25 miles of Boulder since 1950, injuring 49 people. The most recent was on June 7, 2021 (rated EF2).

Tornadoes by (E)F rating

Strongest tornadoes within 25 miles of Boulder

Date	Rating	County	Path length	Width	Injuries
June 4, 2015	EF3	Boulder County	6.7 mi	440 yd	0
June 7, 2021	EF2	Weld County	7.5 mi	50 yd	0
May 30, 1976	F2	Adams County	5.4 mi	67 yd	0
June 3, 1981	F2	Adams County	2.3 mi	133 yd	42
June 5, 1988	F2	Adams County	2 mi	50 yd	0

Most recent tornadoes

Date	Rating	County	Path length	Width
June 7, 2021	EF2	Weld County	7.5 mi	50 yd
June 4, 2015	EF3	Boulder County	6.7 mi	440 yd
May 7, 2015	EF0	Weld County	0.1 mi	50 yd
July 28, 2014	EF0	Weld County	0.1 mi	50 yd
August 3, 2013	EF0	Weld County	0.1 mi	50 yd

Alert type	2016–2025	Last issued
Winter Weather Advisory	264	November 4, 2026
Winter Storm Warning	95	May 18, 2026
Winter Storm Watch	85	May 5, 2026
Red Flag Warning	84	August 5, 2026
Severe Thunderstorm Warning	81	August 30, 2026
Flood Advisory	70	July 28, 2026
High Wind Warning	66	March 16, 2026
High Wind Watch	45	March 12, 2026
Fire Weather Watch	42	August 5, 2026
Severe Thunderstorm Watch	31	August 26, 2026