Alert archive / Colorado / Boulder County
Weather alerts in Boulder County, Colorado, 2025
131 weather alerts in 2025, 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 2025. Tap one for its archive.
- Alerts
- 131
- Warnings
- 43
- Watches
- 27
- Advisories
- 43
- Busiest month
- December21 alerts
- Busiest day
- June 17, 20254 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 3, 1:36 PM MST | Dense Fog Advisory | BOU | 20 hr |
| Jan 3, 1:49 PM MST | Winter Weather Advisory | BOU | 49 hr |
| Jan 6, 1:50 AM MST | Winter Weather Advisory | BOU | 34 hr |
| Jan 9, 2:07 PM MST | Winter Weather Advisory | BOU | 57 hr |
| Jan 16, 1:51 PM MST | Winter Weather Advisory | BOU | 51 hr |
| Jan 17, 2:02 PM MST | Cold Weather Advisory | BOU | 4 days |
| Jan 19, 3:28 AM MST | Extreme Cold Watch | BOU | 23 hr |
| Jan 20, 2:46 AM MST | Extreme Cold Warning | BOU | 30 hr |
| Jan 21, 5:01 PM MST | High Wind Warning | BOU | 6 hr |
| Jan 23, 1:53 PM MST | Winter Weather Advisory | BOU | 63 hr |
| Jan 31, 2:37 PM MST | Winter Weather Advisory | BOU | 37 hr |
| Feb 1, 7:57 PM MST | High Wind Watch | BOU | 8 hr |
| Feb 2, 4:02 AM MST | High Wind Warning | BOU | 25 hr |
| Feb 6, 2:42 PM MST | Winter Weather Advisory | BOU | 40 hr |
| Feb 10, 2:11 PM MST | Winter Weather Advisory | BOU | 43 hr |
| Feb 12, 2:21 AM MST | Cold Weather Advisory | BOU | 30 hr |
| Feb 12, 2:22 PM MST | Winter Storm Watch | BOU | 13 hr |
| Feb 13, 2:55 AM MST | Winter Storm Warning | BOU | 65 hr |
| Feb 13, 2:55 AM MST | Winter Weather Advisory | BOU | 65 hr |
| Feb 15, 2:00 AM MST | Dense Fog Advisory | BOU | 9 hr |
| Feb 15, 2:13 PM MST | Winter Storm Watch | BOU | 12 hr |
| Feb 16, 2:22 AM MST | Winter Storm Warning | BOU | 51 hr |
| Feb 16, 2:22 AM MST | Winter Weather Advisory | BOU | 51 hr |
| Feb 20, 3:12 AM MST | Winter Weather Advisory | BOU | 29 hr |
| Mar 2, 2:34 AM MST | Winter Storm Watch | BOU | 33 hr |
| Mar 2, 2:38 PM MST | Winter Weather Advisory | BOU | 50 hr |
| Mar 3, 2:16 AM MST | Winter Storm Warning | BOU | 25 hr |
| Mar 5, 1:48 PM MST | Winter Weather Advisory | BOU | 54 hr |
| Mar 13, 2:02 PM MDT | Winter Weather Advisory | BOU | 24 hr |
| Mar 16, 2:48 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Mar 16, 1:54 PM MDT | Red Flag Warning | BOU | 29 hr |
| Mar 17, 12:38 PM MDT | Winter Weather Advisory | BOU | 44 hr |
| Mar 17, 7:00 PM MDT | Red Flag Warning | BOU | 24 hr |
| Mar 20, 2:29 PM MDT | Winter Weather Advisory | BOU | 58 hr |
| Mar 21, 2:28 AM MDT | Fire Weather Watch | BOU | 13 hr |
| Mar 21, 3:09 PM MDT | Red Flag Warning | BOU | 29 hr |
| Mar 29, 7:15 PM MDT | Winter Weather Advisory | BOU | 9 hr |
| Mar 31, 3:44 AM MDT | Winter Weather Advisory | BOU | 50 hr |
| Apr 8, 2:01 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 10, 2:31 AM MDT | Fire Weather Watch | BOU | 36 hr |
| Apr 11, 2:45 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 16, 2:33 PM MDT | Winter Storm Watch | BOU | 12 hr |
| Apr 16, 2:33 PM MDT | Winter Weather Advisory | BOU | 63 hr |
| May 4, 2:26 PM MDT | Winter Storm Watch | BOU | 24 hr |
| May 5, 2:14 PM MDT | Winter Storm Warning | BOU | 43 hr |
| May 5, 2:14 PM MDT | Winter Weather Advisory | BOU | 43 hr |
| May 17, 2:33 PM MDT | Winter Weather Advisory | BOU | 37 hr |
| May 18, 3:03 PM MDT | Severe Thunderstorm Warning | BOU | 42 min |
| May 24, 7:13 PM MDT | Dense Fog Advisory | BOU | 10 hr |
| May 27, 1:43 AM MDT | Dense Fog Advisory | BOU | 7 hr |
| May 27, 4:37 PM MDT | Mesoscale Discussion | SPC | 53 min |
| May 30, 11:35 AM MDT | River Flood Watch | BOU | 3 days |
| Jun 1, 3:37 PM MDT | Areal Flood Advisory | BOU | 113 min |
| Jun 8, 2:50 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 13, 12:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 4:06 AM MDT | Severe Thunderstorm Warning | BOU | 39 min |
| Jun 17, 10:48 AM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 17, 12:55 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 17, 1:46 PM MDT | Severe Thunderstorm Warning | BOU | 29 min |
| Jun 18, 1:51 PM MDT | Heat Advisory | BOU | 3 days |
| Jun 25, 6:25 PM MDT | Areal Flood Advisory | BOU | 17 min |
| Jun 25, 6:41 PM MDT | Flash Flood Warning | BOU | 2 hr |
| Jun 25, 7:22 PM MDT | Areal Flood Advisory | BOU | 104 min |
| Jun 29, 1:45 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 29, 2:54 PM MDT | Special Weather Statement | BOU | 36 min |
| Jun 29, 3:47 PM MDT | Severe Thunderstorm Warning | BOU | 43 min |
| Jun 29, 4:28 PM MDT | Special Weather Statement | BOU | 47 min |
| Jul 5, 1:04 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jul 7, 2:28 PM MDT | Heat Advisory | BOU | 55 hr |
| Jul 10, 1:51 PM MDT | Severe Thunderstorm Warning | BOU | 39 min |
| Jul 11, 2:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Jul 11, 5:46 PM MDT | Severe Thunderstorm Warning | BOU | 29 min |
| Jul 11, 6:09 PM MDT | Severe Thunderstorm Warning | BOU | 36 min |
| Jul 11, 6:30 PM MDT | Severe Thunderstorm Warning | BOU | 27 min |
| Jul 11, 6:53 PM MDT | Areal Flood Advisory | BOU | 2 hr |
| Jul 16, 1:36 PM MDT | Mesoscale Discussion | SPC | 84 min |
| Jul 16, 2:45 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 16, 2:47 PM MDT | Severe Thunderstorm Warning | BOU | 28 min |
| Jul 16, 10:02 PM MDT | Flash Flood Warning | BOU | 118 min |
| Jul 23, 2:43 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 24, 1:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 30, 12:10 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 31, 1:49 PM MDT | Mesoscale Discussion | SPC | 56 min |
| Jul 31, 3:49 PM MDT | Special Weather Statement | BOU | 41 min |
| Aug 4, 2:09 PM MDT | Red Flag Warning | BOU | 30 hr |
| Aug 5, 1:45 PM MDT | Heat Advisory | BOU | 53 hr |
| Aug 5, 2:04 PM MDT | Red Flag Warning | BOU | 30 hr |
| Aug 6, 2:47 PM MDT | Fire Weather Watch | BOU | 18 hr |
| Aug 7, 9:07 AM MDT | Red Flag Warning | BOU | 35 hr |
| Aug 10, 12:15 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Aug 10, 7:05 PM MDT | Areal Flood Advisory | BOU | 115 min |
| Aug 10, 7:16 PM MDT | Severe Thunderstorm Warning | BOU | 17 min |
| Aug 10, 7:49 PM MDT | Special Weather Statement | BOU | 26 min |
| Aug 12, 2:33 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Aug 13, 2:50 PM MDT | Red Flag Warning | BOU | 29 hr |
| Aug 23, 1:21 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 23, 3:11 PM MDT | Special Weather Statement | BOU | 34 min |
| Aug 23, 3:49 PM MDT | Severe Thunderstorm Warning | BOU | 26 min |
| Aug 30, 3:57 PM MDT | Special Weather Statement | BOU | 33 min |
| Sep 22, 2:13 PM MDT | Winter Weather Advisory | BOU | 28 hr |
| Oct 17, 1:34 PM MDT | Frost Advisory | BOU | 42 hr |
| Oct 17, 1:39 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Oct 18, 1:26 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Oct 19, 1:32 PM MDT | Red Flag Warning | BOU | 28 hr |
| Oct 20, 2:06 AM MDT | Freeze Warning | BOU | 30 hr |
| Oct 27, 12:27 PM MDT | Freeze Warning | BOU | 22 hr |
| Oct 27, 12:27 PM MDT | Freeze Warning | BOU | 46 hr |
| Nov 6, 7:21 AM MST | Red Flag Warning | BOU | 10 hr |
| Nov 28, 2:29 AM MST | Winter Weather Advisory | BOU | 32 hr |
| Nov 29, 2:03 PM MST | Winter Weather Advisory | BOU | 39 hr |
| Dec 1, 1:52 PM MST | Winter Weather Advisory | BOU | 54 hr |
| Dec 4, 2:20 AM MST | Winter Storm Watch | BOU | 12 hr |
| Dec 4, 2:21 PM MST | Winter Storm Warning | BOU | 57 hr |
| Dec 7, 12:57 PM MST | High Wind Watch | BOU | 20 hr |
| Dec 8, 9:12 AM MST | High Wind Watch | BOU | 18 hr |
| Dec 8, 9:12 AM MST | High Wind Warning | BOU | 39 hr |
| Dec 10, 3:39 AM MST | High Wind Warning | BOU | 31 hr |
| Dec 11, 8:16 AM MST | Red Flag Warning | BOU | 9 hr |
| Dec 15, 12:55 PM MST | High Wind Watch | BOU | 13 hr |
| Dec 15, 1:20 PM MST | Fire Weather Watch | BOU | 14 hr |
| Dec 16, 1:51 AM MST | High Wind Warning | BOU | 58 hr |
| Dec 16, 3:06 AM MST | Red Flag Warning | BOU | 39 hr |
| Dec 16, 2:06 PM MST | Winter Weather Advisory | BOU | 33 hr |
| Dec 17, 2:26 PM MST | High Wind Watch | BOU | 51 hr |
| Dec 17, 3:24 PM MST | Fire Weather Watch | BOU | 35 hr |
| Dec 18, 2:44 PM MST | Red Flag Warning | BOU | 33 hr |
| Dec 18, 6:01 PM MST | High Wind Warning | BOU | 26 hr |
| Dec 19, 2:07 AM MST | Winter Weather Advisory | BOU | 43 hr |
| Dec 21, 2:31 PM MST | Fire Weather Watch | BOU | 11 hr |
| Dec 22, 1:48 AM MST | Red Flag Warning | BOU | 15 hr |
| Dec 26, 2:40 PM MST | Winter Weather Advisory | BOU | 44 hr |
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 | 11 |
| Severe Thunderstorm Watch | 4 |
| Mesoscale Discussion | 12 |
| Special Weather Statement | 6 |
| Flooding | |
| Flash Flood Warning | 2 |
| River Flood Watch | 1 |
| Areal Flood Advisory | 5 |
| Winter | |
| Winter Storm Warning | 5 |
| Winter Storm Watch | 6 |
| Winter Weather Advisory | 28 |
| Heat | |
| Heat Advisory | 3 |
| Cold | |
| Extreme Cold Warning | 1 |
| Freeze Warning | 3 |
| Extreme Cold Watch | 1 |
| Cold Weather Advisory | 2 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 6 |
| High Wind Watch | 5 |
| Fire | |
| Red Flag Warning | 15 |
| Fire Weather Watch | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 4 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20242026
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.