Alert archive / Colorado / Boulder County
Weather alerts in Boulder County, Colorado, 2026
132 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Boulder County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 132
- Warnings
- 46
- Watches
- 38
- Advisories
- 26
- Busiest month
- June29 alerts
- Busiest day
- February 23, 20264 alerts
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 2, 12:07 PM MST | Fire Weather Watch | BOU | 39 hr |
| Jan 5, 4:51 PM MST | Fire Weather Watch | BOU | 10 hr |
| Jan 6, 3:03 AM MST | Red Flag Warning | BOU | 14 hr |
| Jan 7, 2:34 PM MST | Winter Weather Advisory | BOU | 44 hr |
| Jan 14, 1:47 PM MST | Fire Weather Watch | BOU | 20 hr |
| Jan 14, 1:47 PM MST | Red Flag Warning | BOU | 28 hr |
| Jan 15, 10:01 AM MST | Red Flag Warning | BOU | 32 hr |
| Jan 22, 1:51 AM MST | Winter Weather Advisory | BOU | 63 hr |
| Jan 22, 1:58 AM MST | Cold Weather Advisory | BOU | 4 days |
| Jan 25, 1:02 PM MST | Winter Weather Advisory | BOU | 6 hr |
| Feb 10, 11:58 AM MST | Winter Weather Advisory | BOU | 47 hr |
| Feb 13, 10:55 AM MST | Winter Weather Advisory | BOU | 16 hr |
| Feb 13, 12:30 PM MST | Fire Weather Watch | BOU | 72 hr |
| Feb 15, 12:24 PM MST | Winter Weather Advisory | BOU | 4 days |
| Feb 16, 12:13 PM MST | Red Flag Warning | BOU | 31 hr |
| Feb 17, 10:51 PM MST | High Wind Watch | BOU | 12 hr |
| Feb 18, 11:02 AM MST | High Wind Warning | BOU | 16 hr |
| Feb 22, 12:34 PM MST | High Wind Watch | BOU | 24 hr |
| Feb 23, 11:59 AM MST | Red Flag Warning | BOU | 29 hr |
| Feb 23, 12:26 PM MST | High Wind Warning | BOU | 30 hr |
| Feb 23, 12:44 PM MST | Winter Storm Warning | BOU | 59 hr |
| Feb 23, 12:44 PM MST | Winter Weather Advisory | BOU | 59 hr |
| Feb 24, 11:57 AM MST | Red Flag Warning | BOU | 30 hr |
| Feb 25, 1:00 AM MST | Fire Weather Watch | BOU | 26 hr |
| Feb 26, 3:16 AM MST | Fire Weather Watch | BOU | 8 hr |
| Feb 26, 11:04 AM MST | Red Flag Warning | BOU | 31 hr |
| Mar 3, 3:51 AM MST | Winter Weather Advisory | BOU | 11 hr |
| Mar 4, 12:30 PM MST | Winter Storm Watch | BOU | 11 hr |
| Mar 4, 12:30 PM MST | Winter Weather Advisory | BOU | 58 hr |
| Mar 4, 11:03 PM MST | Winter Storm Warning | BOU | 46 hr |
| Mar 10, 2:26 AM MDT | Red Flag Warning | BOU | 11 hr |
| Mar 10, 9:51 AM MDT | High Wind Watch | BOU | 38 hr |
| Mar 10, 1:06 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Mar 11, 1:00 PM MDT | High Wind Warning | BOU | 47 hr |
| Mar 11, 1:22 PM MDT | Red Flag Warning | BOU | 32 hr |
| Mar 11, 11:23 PM MDT | Fire Weather Watch | BOU | 13 hr |
| Mar 12, 12:50 PM MDT | Fire Weather Watch | BOU | 8 hr |
| Mar 12, 12:50 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 12, 8:58 PM MDT | Red Flag Warning | BOU | 48 hr |
| Mar 12, 11:12 PM MDT | Winter Weather Advisory | BOU | 61 hr |
| Mar 16, 3:02 AM MDT | High Wind Warning | BOU | 11 hr |
| Mar 17, 1:09 PM MDT | Red Flag Warning | BOU | 30 hr |
| Mar 19, 2:16 AM MDT | Fire Weather Watch | BOU | 35 hr |
| Mar 20, 12:46 PM MDT | Red Flag Warning | BOU | 33 hr |
| Mar 29, 3:00 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Mar 29, 12:19 PM MDT | Red Flag Warning | BOU | 32 hr |
| Mar 30, 11:40 AM MDT | Winter Weather Advisory | BOU | 57 hr |
| Apr 2, 12:57 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 10, 12:38 PM MDT | Fire Weather Watch | BOU | 35 hr |
| Apr 15, 11:58 AM MDT | Freeze Watch | BOU | 23 hr |
| Apr 16, 11:02 AM MDT | Freeze Warning | BOU | 45 hr |
| Apr 16, 10:55 PM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 20, 11:42 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Apr 20, 8:48 PM MDT | Red Flag Warning | BOU | 51 hr |
| Apr 21, 1:15 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Apr 22, 12:22 PM MDT | Red Flag Warning | BOU | 31 hr |
| Apr 22, 11:51 PM MDT | Fire Weather Watch | BOU | 14 hr |
| Apr 23, 1:41 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 26, 12:53 PM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 27, 7:25 AM MDT | Dense Fog Advisory | BOU | 3 hr |
| Apr 29, 12:22 PM MDT | Winter Weather Advisory | BOU | 39 hr |
| May 3, 1:43 PM MDT | Winter Storm Watch | BOU | 34 hr |
| May 4, 12:51 AM MDT | Winter Storm Warning | BOU | 61 hr |
| May 4, 12:59 PM MDT | Freeze Watch | BOU | 23 hr |
| May 5, 11:31 AM MDT | Freeze Warning | BOU | 44 hr |
| May 17, 4:27 AM MDT | Winter Weather Advisory | BOU | 41 hr |
| May 17, 11:53 AM MDT | Freeze Watch | BOU | 24 hr |
| May 17, 7:22 PM MDT | Special Weather Statement | BOU | 23 min |
| May 17, 7:50 PM MDT | Special Weather Statement | BOU | 25 min |
| May 17, 10:58 PM MDT | Winter Storm Warning | BOU | 22 hr |
| May 28, 6:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 28, 8:45 PM MDT | Special Weather Statement | BOU | 30 min |
| Jun 1, 11:51 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 1, 12:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 1:35 PM MDT | Severe Thunderstorm Warning | BOU | 23 min |
| Jun 7, 12:32 PM MDT | Fire Weather Watch | BOU | 25 hr |
| Jun 15, 2:23 PM MDT | Fire Weather Watch | BOU | 21 hr |
| Jun 16, 11:38 AM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 18, 12:35 AM MDT | Fire Weather Watch | BOU | 35 hr |
| Jun 19, 11:29 AM MDT | Red Flag Warning | BOU | 34 hr |
| Jun 21, 9:17 PM MDT | Special Weather Statement | BOU | 28 min |
| Jun 21, 9:30 PM MDT | Severe Thunderstorm Warning | BOU | 30 min |
| Jun 22, 12:02 AM MDT | Fire Weather Watch | BOU | 12 hr |
| Jun 22, 12:18 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 23, 12:12 AM MDT | Fire Weather Watch | BOU | 26 hr |
| Jun 23, 12:05 PM MDT | Red Flag Warning | BOU | 30 hr |
| Jun 23, 1:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:39 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 24, 7:47 PM MDT | Severe Thunderstorm Warning | BOU | 32 min |
| Jun 25, 12:18 AM MDT | Fire Weather Watch | BOU | 24 hr |
| Jun 26, 12:24 AM MDT | Red Flag Warning | BOU | 48 hr |
| Jun 26, 1:57 PM MDT | Severe Thunderstorm Warning | BOU | 27 min |
| Jun 26, 2:28 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Jun 26, 9:59 PM MDT | Severe Thunderstorm Warning | BOU | 31 min |
| Jun 26, 10:29 PM MDT | Special Weather Statement | BOU | 31 min |
| Jun 27, 1:11 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 28, 2:49 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Jun 28, 12:40 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 29, 2:56 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Jun 29, 12:48 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 30, 2:49 AM MDT | Fire Weather Watch | BOU | 22 hr |
| Jul 1, 10:15 PM MDT | Special Weather Statement | BOU | 45 min |
| Jul 9, 2:21 PM MDT | Special Weather Statement | BOU | 24 min |
| Jul 12, 1:11 PM MDT | Heat Advisory | BOU | 32 hr |
| Jul 17, 12:00 PM MDT | Heat Advisory | BOU | 3 days |
| Jul 20, 2:51 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 22, 2:19 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | 42 hr |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | 66 hr |
| Jul 24, 5:05 PM MDT | Severe Thunderstorm Warning | BOU | 40 min |
| Jul 28, 1:52 PM MDT | Severe Thunderstorm Warning | BOU | 26 min |
| Jul 28, 2:18 PM MDT | Special Weather Statement | BOU | 27 min |
| Jul 28, 2:28 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 28, 2:48 PM MDT | Areal Flood Advisory | BOU | 117 min |
| Jul 31, 2:15 AM MDT | Heat Advisory | BOU | 4 days |
| Jul 31, 5:19 PM MDT | Special Weather Statement | BOU | 26 min |
| Aug 4, 1:39 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Aug 4, 12:20 PM MDT | Red Flag Warning | BOU | 31 hr |
| Aug 6, 12:07 PM MDT | Heat Advisory | BOU | 3 days |
| Aug 8, 2:49 PM MDT | Special Weather Statement | BOU | 41 min |
| Aug 13, 2:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 15, 1:06 AM MDT | Flood Watch | BOU | 19 hr |
| Aug 15, 1:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 22, 1:15 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 24, 1:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 26, 3:53 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 27, 3:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 29, 1:29 PM MDT | Special Weather Statement | BOU | 46 min |
| Aug 29, 2:49 PM MDT | Special Weather Statement | BOU | 26 min |
| Aug 30, 1:53 PM MDT | Severe Thunderstorm Warning | BOU | 24 min |
| Aug 30, 2:10 PM MDT | Severe Thunderstorm Warning | BOU | 35 min |
| Aug 30, 3:20 PM MDT | Special Weather Statement | BOU | 115 min |
By product
Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.
| Product | Alerts |
|---|---|
| Severe storms | |
| Severe Thunderstorm Warning | 9 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 9 |
| Special Weather Statement | 13 |
| Flooding | |
| Flood Watch | 1 |
| Areal Flood Advisory | 3 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 15 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 3 |
| Cold Weather Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 4 |
| High Wind Watch | 3 |
| Fire | |
| Red Flag Warning | 27 |
| Fire Weather Watch | 26 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
Sources
National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Rebuilt daily.