Boulder County weather alerts
There are no active weather alerts for Boulder County, CO right now.
Since 2016 the National Weather Service has issued about 931 alerts that included Boulder County, roughly 93 a year. The most common is the winter weather advisory (264 from 2016 to 2025). No tornado warnings were recorded here in that period. 11 tornadoes have touched down in the county since 1950.
Updated from the National Weather Service · lists refresh hourly; the live map loads current alerts directly from the NWS
No warnings, watches or advisories include Boulder County at the moment. This page updates automatically when the National Weather Service issues one. Check neighboring Jefferson County, Grand County, Weld County, Broomfield County.
Boulder County alert history
Alert events that included Boulder County or its forecast zones, from the NWS warning archive.
| Alert type | 2016–2025 | 2026 | Last issued |
|---|---|---|---|
| Winter Weather Advisory | 264 | 17 | November 4, 2026 |
| Winter Storm Warning | 95 | 4 | May 18, 2026 |
| Winter Storm Watch | 85 | 2 | May 5, 2026 |
| Red Flag Warning | 84 | 15 | August 5, 2026 |
| Severe Thunderstorm Warning | 81 | 9 | August 30, 2026 |
| Flood Advisory | 70 | 3 | July 28, 2026 |
| High Wind Warning | 66 | 4 | March 16, 2026 |
| High Wind Watch | 45 | 3 | March 12, 2026 |
| Fire Weather Watch | 42 | 15 | August 5, 2026 |
| Severe Thunderstorm Watch | 31 | 3 | August 26, 2026 |
| Flood Watch | 30 | 0 | August 13, 2024 |
| Flash Flood Warning | 19 | 0 | July 17, 2025 |
| Dense Fog Advisory | 5 | 0 | May 25, 2025 |
| Tornado Watch | 4 | 0 | June 29, 2023 |
| Snow Squall Warning | 3 | 0 | February 27, 2024 |
| Cold Weather Advisory | 2 | 0 | February 13, 2025 |
| Extreme Cold Watch | 2 | 0 | January 21, 2025 |
| Extreme Cold Warning | 2 | 0 | January 21, 2025 |
| Blizzard Warning | 1 | 0 | March 13, 2019 |
Tornado history in Boulder County
11 tornadoes have been recorded in Boulder County since 1950. That ranks 29 of 64 counties in Colorado. The most recent was on June 4, 2015 (rated EF3).
Strongest tornadoes in Boulder County
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 4, 2015 | EF3 | Boulder County | 6.7 mi | 440 yd | 0 | 0 |
| October 15, 1980 | F2 | Boulder County | 1.5 mi | 50 yd | 0 | 0 |
| June 5, 1988 | F2 | Boulder County | 0.5 mi | 50 yd | 0 | 0 |
| April 30, 1980 | F1 | Boulder County | 5.7 mi | 20 yd | 0 | 0 |
| June 16, 1996 | F1 | Boulder County | 1.5 mi | 300 yd | 0 | 0 |
Most recent tornadoes
| Date | Rating | County | Path length | Width | Deaths | Injuries |
|---|---|---|---|---|---|---|
| June 4, 2015 | EF3 | Boulder County | 6.7 mi | 440 yd | 0 | 0 |
| June 6, 1997 | F1 | Boulder County | 0.1 mi | 50 yd | 0 | 0 |
| July 12, 1996 | F0 | Boulder County | 0.1 mi | 50 yd | 0 | 0 |
| June 16, 1996 | F1 | Boulder County | 1.5 mi | 300 yd | 0 | 0 |
| June 1, 1990 | F0 | Boulder County | 0.2 mi | 20 yd | 0 | 0 |
About Boulder County
- Population: 330,262 (2024 estimate)
- State: Colorado
- NOAA Weather Radio SAME code: 008013 (how to use it)
- Cities: Boulder