Alert archive / Colorado / Boulder County
Weather alerts in Boulder County, Colorado, 2023
156 weather alerts in 2023, 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 2023. Tap one for its archive.
- Alerts
- 156
- Warnings
- 40
- Watches
- 35
- Advisories
- 44
- Busiest month
- June26 alerts
- Busiest day
- May 10, 20238 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 1, 3:06 AM MST | Winter Weather Advisory | BOU | 45 hr |
| Jan 10, 2:06 PM MST | Winter Weather Advisory | BOU | 33 hr |
| Jan 12, 1:15 AM MST | Dense Fog Advisory | BOU | 7 hr |
| Jan 15, 2:52 PM MST | Winter Storm Watch | BOU | 22 hr |
| Jan 16, 12:36 PM MST | Winter Storm Warning | BOU | 58 hr |
| Jan 16, 12:36 PM MST | Winter Weather Advisory | BOU | 52 hr |
| Jan 25, 2:13 PM MST | Winter Storm Watch | BOU | 12 hr |
| Jan 26, 1:55 AM MST | Winter Storm Warning | BOU | 63 hr |
| Jan 27, 3:06 AM MST | Winter Weather Advisory | BOU | 38 hr |
| Jan 28, 3:14 AM MST | Winter Storm Warning | BOU | 62 hr |
| Jan 29, 8:36 AM MST | Winter Weather Advisory | BOU | 38 hr |
| Jan 30, 11:26 AM MST | Winter Weather Advisory | BOU | 9 hr |
| Feb 8, 5:37 PM MST | Winter Weather Advisory | BOU | 11 hr |
| Feb 8, 5:44 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Feb 14, 2:59 AM MST | Winter Weather Advisory | BOU | 45 hr |
| Feb 18, 2:12 AM MST | High Wind Watch | BOU | 25 hr |
| Feb 19, 3:25 AM MST | High Wind Warning | BOU | 57 hr |
| Feb 20, 2:18 AM MST | Winter Storm Watch | BOU | 26 hr |
| Feb 20, 2:08 PM MST | Winter Storm Warning | BOU | 54 hr |
| Feb 21, 3:50 AM MST | Winter Weather Advisory | BOU | 49 hr |
| Feb 21, 2:53 PM MST | Wind Chill Advisory | BOU | 42 hr |
| Feb 25, 2:08 PM MST | High Wind Watch | BOU | 22 hr |
| Feb 26, 12:04 PM MST | High Wind Warning | BOU | 18 hr |
| Mar 3, 1:32 PM MST | Winter Weather Advisory | BOU | 63 hr |
| Mar 4, 1:53 PM MST | Red Flag Warning | BOU | 28 hr |
| Mar 7, 6:21 AM MST | Winter Weather Advisory | BOU | 5 hr |
| Mar 8, 3:21 PM MST | Red Flag Warning | BOU | 25 hr |
| Mar 9, 2:19 AM MST | Winter Storm Watch | BOU | 13 hr |
| Mar 9, 2:59 PM MST | Winter Storm Warning | BOU | 44 hr |
| Mar 14, 2:56 AM MDT | Winter Weather Advisory | BOU | 57 hr |
| Mar 19, 2:39 PM MDT | Winter Weather Advisory | BOU | 41 hr |
| Mar 20, 2:16 PM MDT | Winter Weather Advisory | BOU | 58 hr |
| Mar 29, 3:07 PM MDT | Red Flag Warning | BOU | 52 hr |
| Mar 31, 12:59 PM MDT | Blowing Dust Advisory | BOU | 5 hr |
| Apr 1, 2:31 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 2, 1:49 PM MDT | Winter Storm Warning | BOU | 58 hr |
| Apr 3, 3:01 AM MDT | Winter Weather Advisory | BOU | 42 hr |
| Apr 11, 2:33 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Apr 12, 2:35 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 13, 2:35 PM MDT | Winter Weather Advisory | BOU | 39 hr |
| Apr 16, 5:02 AM MDT | Fire Weather Watch | BOU | 34 hr |
| Apr 17, 2:35 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 20, 1:22 PM MDT | Winter Weather Advisory | BOU | 46 hr |
| Apr 23, 1:53 PM MDT | Winter Storm Watch | BOU | 24 hr |
| Apr 24, 1:45 PM MDT | Winter Storm Warning | BOU | 39 hr |
| Apr 27, 3:29 AM MDT | Winter Weather Advisory | BOU | 27 hr |
| May 9, 10:22 PM MDT | Special Weather Statement | BOU | 38 min |
| May 9, 10:28 PM MDT | Severe Thunderstorm Warning | BOU | 47 min |
| May 9, 10:57 PM MDT | Severe Thunderstorm Warning | BOU | 63 min |
| May 9, 11:11 PM MDT | Severe Thunderstorm Warning | BOU | 64 min |
| May 9, 11:24 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| May 10, 12:17 AM MDT | Mesoscale Discussion | SPC | 58 min |
| May 10, 3:08 AM MDT | Flood Watch | BOU | 57 hr |
| May 10, 1:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 10, 8:35 PM MDT | Winter Weather Advisory | BOU | 6 hr |
| May 10, 9:02 PM MDT | Winter Storm Watch | BOU | 5 hr |
| May 11, 2:09 AM MDT | Winter Storm Warning | BOU | 32 hr |
| May 18, 3:35 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| May 18, 3:57 PM MDT | Flash Flood Warning | BOU | 84 min |
| May 26, 11:56 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 26, 12:08 PM MDT | Special Weather Statement | BOU | 52 min |
| May 26, 1:33 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| May 26, 2:40 PM MDT | Severe Thunderstorm Warning | BOU | 22 min |
| May 28, 2:42 PM MDT | Special Weather Statement | BOU | 33 min |
| May 31, 3:03 PM MDT | Severe Thunderstorm Warning | BOU | 42 min |
| May 31, 3:40 PM MDT | Severe Thunderstorm Warning | BOU | 50 min |
| May 31, 4:04 PM MDT | Severe Thunderstorm Warning | BOU | 41 min |
| Jun 2, 12:19 PM MDT | Areal Flood Advisory | BOU | 86 min |
| Jun 5, 8:42 AM MDT | Flash Flood Watch | BOU | 8 hr |
| Jun 7, 2:35 AM MDT | Flash Flood Watch | BOU | 17 hr |
| Jun 7, 4:18 PM MDT | Special Weather Statement | BOU | 42 min |
| Jun 7, 5:30 PM MDT | Special Weather Statement | BOU | 30 min |
| Jun 11, 11:43 AM MDT | Flood Watch | BOU | 15 hr |
| Jun 12, 3:24 AM MDT | Flood Watch | BOU | 21 hr |
| Jun 12, 12:11 PM MDT | Special Weather Statement | BOU | 49 min |
| Jun 12, 12:45 PM MDT | Severe Thunderstorm Warning | BOU | 30 min |
| Jun 12, 12:48 PM MDT | Areal Flood Advisory | BOU | 4 hr |
| Jun 16, 2:23 AM MDT | Flood Watch | BOU | 20 hr |
| Jun 21, 12:36 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 21, 2:49 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jun 21, 5:25 PM MDT | Mesoscale Discussion | SPC | 65 min |
| Jun 21, 5:54 PM MDT | Severe Thunderstorm Warning | BOU | 36 min |
| Jun 21, 7:58 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jun 22, 10:13 AM MDT | Flood Watch | BOU | 14 hr |
| Jun 22, 11:08 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 22, 12:14 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 22, 2:37 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Jun 22, 3:04 PM MDT | Severe Thunderstorm Warning | BOU | 22 min |
| Jun 22, 3:48 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jun 22, 5:56 PM MDT | Mesoscale Discussion | SPC | 94 min |
| Jun 29, 11:40 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 29, 1:17 PM MDT | Tornado Watch | SPC | 8 hr |
| Jun 29, 1:39 PM MDT | Special Weather Statement | BOU | 51 min |
| Jul 4, 1:41 PM MDT | Mesoscale Discussion | SPC | 64 min |
| Jul 4, 1:43 PM MDT | Special Weather Statement | BOU | 32 min |
| Jul 4, 2:05 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 4, 2:21 PM MDT | Special Weather Statement | BOU | 24 min |
| Jul 4, 5:14 PM MDT | Mesoscale Discussion | SPC | 91 min |
| Jul 4, 5:19 PM MDT | Special Weather Statement | BOU | 26 min |
| Jul 4, 6:54 PM MDT | Special Weather Statement | BOU | 36 min |
| Jul 4, 8:03 PM MDT | Areal Flood Advisory | BOU | 87 min |
| Jul 5, 9:36 PM MDT | Dense Fog Advisory | BOU | 11 hr |
| Jul 6, 1:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 6, 2:51 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 8, 12:23 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 8, 1:09 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jul 15, 2:17 PM MDT | Heat Advisory | BOU | 54 hr |
| Jul 15, 4:11 PM MDT | Severe Thunderstorm Warning | BOU | 23 min |
| Jul 15, 4:38 PM MDT | Mesoscale Discussion | SPC | 97 min |
| Jul 15, 4:46 PM MDT | Severe Thunderstorm Warning | BOU | 29 min |
| Jul 17, 4:46 PM MDT | Special Weather Statement | BOU | 59 min |
| Jul 20, 1:27 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jul 21, 7:19 PM MDT | Special Weather Statement | BOU | 26 min |
| Jul 26, 2:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 28, 3:59 PM MDT | Severe Thunderstorm Warning | BOU | 31 min |
| Jul 31, 3:11 AM MDT | Flood Watch | BOU | 21 hr |
| Jul 31, 2:37 PM MDT | Flood Watch | BOU | 32 hr |
| Jul 31, 6:38 PM MDT | Severe Thunderstorm Warning | BOU | 37 min |
| Aug 1, 5:05 PM MDT | Special Weather Statement | BOU | 25 min |
| Aug 1, 5:13 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Aug 1, 6:10 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Aug 6, 6:02 PM MDT | Special Weather Statement | BOU | 28 min |
| Aug 24, 1:53 PM MDT | Flood Watch | BOU | 30 hr |
| Aug 27, 3:33 PM MDT | Special Weather Statement | BOU | 42 min |
| Aug 28, 2:22 PM MDT | Special Weather Statement | BOU | 38 min |
| Aug 28, 2:41 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Sep 3, 3:03 PM MDT | Special Weather Statement | BOU | 27 min |
| Sep 10, 2:06 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Sep 14, 3:09 PM MDT | Areal Flood Advisory | BOU | 59 min |
| Oct 6, 2:56 AM MDT | Frost Advisory | BOU | 30 hr |
| Oct 10, 2:48 PM MDT | Winter Weather Advisory | BOU | 63 hr |
| Oct 11, 3:44 PM MDT | Special Weather Statement | BOU | 46 min |
| Oct 12, 1:12 PM MDT | Freeze Watch | BOU | 15 hr |
| Oct 13, 4:06 AM MDT | Freeze Warning | BOU | 29 hr |
| Oct 26, 7:17 AM MDT | Dense Fog Advisory | BOU | 5 hr |
| Oct 26, 1:51 PM MDT | Winter Storm Watch | BOU | 12 hr |
| Oct 26, 5:21 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 27, 1:53 AM MDT | Winter Storm Warning | BOU | 58 hr |
| Oct 27, 2:22 PM MDT | Winter Storm Watch | BOU | 6 hr |
| Nov 7, 1:46 PM MST | Winter Weather Advisory | BOU | 34 hr |
| Nov 22, 1:49 AM MST | Winter Storm Watch | BOU | 12 hr |
| Nov 22, 1:59 PM MST | Winter Storm Warning | BOU | 45 hr |
| Nov 22, 1:59 PM MST | Winter Weather Advisory | BOU | 63 hr |
| Nov 25, 6:40 AM MST | Winter Weather Advisory | BOU | 7 hr |
| Dec 1, 3:16 AM MST | Winter Storm Warning | BOU | 3 days |
| Dec 1, 1:42 PM MST | Winter Weather Advisory | BOU | 63 hr |
| Dec 1, 1:45 PM MST | High Wind Watch | BOU | 23 hr |
| Dec 2, 12:43 PM MST | High Wind Warning | BOU | 25 hr |
| Dec 5, 2:22 PM MST | High Wind Watch | BOU | 23 hr |
| Dec 6, 1:25 PM MST | High Wind Warning | BOU | 28 hr |
| Dec 7, 3:01 AM MST | Winter Weather Advisory | BOU | 50 hr |
| Dec 9, 3:55 AM MST | High Wind Watch | BOU | 9 hr |
| Dec 9, 1:18 PM MST | High Wind Warning | BOU | 28 hr |
| Dec 12, 5:28 PM MST | Winter Weather Advisory | BOU | 16 hr |
| Dec 14, 4:51 AM MST | Dense Fog Advisory | BOU | 5 hr |
| Dec 22, 8:49 PM MST | Winter Weather Advisory | BOU | 38 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 | 14 |
| Severe Thunderstorm Watch | 7 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 19 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flash Flood Watch | 2 |
| Flood Watch | 8 |
| Areal Flood Advisory | 9 |
| Winter | |
| Winter Storm Warning | 11 |
| Winter Storm Watch | 9 |
| Winter Weather Advisory | 27 |
| Heat | |
| Heat Advisory | 1 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 5 |
| Blowing Dust Advisory | 1 |
| Fire | |
| Red Flag Warning | 6 |
| Fire Weather Watch | 2 |
| 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 archive20222024
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.