Alert archive / Colorado / Boulder County
Weather alerts in Boulder County, Colorado, 2011
185 weather alerts in 2011, 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 2011. Tap one for its archive.
- Alerts
- 185
- Warnings
- 56
- Watches
- 39
- Advisories
- 62
- Busiest month
- July56 alerts
- Busiest day
- July 14, 201113 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 7, 2:53 PM MST | Winter Storm Watch | BOU | 25 hr |
| Jan 8, 3:52 PM MST | Winter Weather Advisory | BOU | 41 hr |
| Jan 15, 3:18 PM MST | Winter Storm Watch | BOU | 13 hr |
| Jan 16, 3:50 AM MST | Winter Storm Warning | BOU | 54 hr |
| Jan 16, 2:44 PM MST | High Wind Warning | BOU | 25 hr |
| Jan 19, 4:23 AM MST | Winter Weather Advisory | BOU | 18 hr |
| Jan 21, 4:39 AM MST | Winter Weather Advisory | BOU | 41 hr |
| Jan 30, 3:13 PM MST | Winter Weather Advisory | BOU | 33 hr |
| Jan 31, 4:10 PM MST | Wind Chill Warning | BOU | 44 hr |
| Feb 1, 3:25 PM MST | Wind Chill Advisory | BOU | 18 hr |
| Feb 4, 3:29 PM MST | Winter Storm Warning | BOU | 39 hr |
| Feb 4, 3:29 PM MST | Winter Weather Advisory | BOU | 18 hr |
| Feb 5, 2:33 PM MST | Winter Weather Advisory | BOU | 5 hr |
| Feb 6, 3:57 AM MST | Winter Weather Advisory | BOU | 12 hr |
| Feb 6, 3:52 PM MST | Winter Weather Advisory | BOU | 44 hr |
| Feb 7, 3:44 PM MST | Winter Storm Warning | BOU | 12 hr |
| Feb 15, 3:14 PM MST | Winter Storm Watch | BOU | 12 hr |
| Feb 16, 3:03 AM MST | Winter Weather Advisory | BOU | 37 hr |
| Feb 19, 3:47 AM MST | Winter Weather Advisory | BOU | 38 hr |
| Feb 23, 2:05 PM MST | Winter Storm Watch | BOU | 22 hr |
| Feb 24, 12:15 PM MST | Winter Weather Advisory | BOU | 39 hr |
| Feb 28, 11:20 AM MST | Red Flag Warning | BOU | 6 hr |
| Mar 6, 2:52 PM MST | Winter Weather Advisory | BOU | 37 hr |
| Mar 10, 3:19 AM MST | High Wind Watch | BOU | 12 hr |
| Mar 10, 4:37 AM MST | Fire Weather Watch | BOU | 11 hr |
| Mar 10, 3:39 PM MST | Red Flag Warning | BOU | 26 hr |
| Mar 15, 2:43 PM MDT | Red Flag Warning | BOU | 29 hr |
| Mar 15, 2:43 PM MDT | Red Flag Warning | BOU | 52 hr |
| Mar 15, 2:48 PM MDT | Winter Storm Watch | BOU | 24 hr |
| Mar 16, 3:11 PM MDT | Winter Storm Warning | BOU | 37 hr |
| Mar 17, 3:55 PM MDT | Winter Weather Advisory | BOU | 12 hr |
| Mar 20, 3:57 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Mar 20, 12:41 PM MDT | Red Flag Warning | BOU | 33 hr |
| Mar 21, 4:31 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Mar 21, 2:45 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 22, 3:49 AM MDT | High Wind Watch | BOU | 7 hr |
| Mar 22, 10:35 AM MDT | High Wind Warning | BOU | 11 hr |
| Mar 22, 10:06 PM MDT | High Wind Warning | BOU | 4 hr |
| Mar 24, 2:38 AM MDT | Red Flag Warning | BOU | 17 hr |
| Mar 28, 12:29 PM MDT | Winter Weather Advisory | BOU | 12 hr |
| Mar 30, 4:03 PM MDT | Red Flag Warning | BOU | 26 hr |
| Apr 1, 4:20 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Apr 1, 3:34 PM MDT | Red Flag Warning | BOU | 44 hr |
| Apr 2, 4:51 PM MDT | Winter Weather Advisory | BOU | 28 hr |
| Apr 4, 4:04 AM MDT | High Wind Watch | BOU | 12 hr |
| Apr 4, 4:11 AM MDT | Fire Weather Watch | BOU | 12 hr |
| Apr 4, 3:51 PM MDT | Red Flag Warning | BOU | 28 hr |
| Apr 6, 2:28 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Apr 7, 2:47 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Apr 7, 2:47 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 8, 2:01 PM MDT | Red Flag Warning | BOU | 31 hr |
| Apr 10, 4:28 AM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 13, 4:06 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Apr 17, 3:42 PM MDT | Winter Storm Watch | BOU | 12 hr |
| Apr 18, 3:33 AM MDT | Winter Weather Advisory | BOU | 25 hr |
| Apr 21, 4:52 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Apr 23, 4:05 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| Apr 24, 3:53 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| Apr 25, 3:33 PM MDT | Winter Weather Advisory | BOU | 19 hr |
| Apr 26, 10:55 AM MDT | Winter Storm Warning | BOU | 13 hr |
| Apr 29, 10:50 AM MDT | Winter Weather Advisory | BOU | 18 hr |
| May 8, 4:02 PM MDT | Red Flag Warning | BOU | 28 hr |
| May 10, 3:09 PM MDT | Winter Weather Advisory | BOU | 20 hr |
| May 11, 5:26 AM MDT | Flash Flood Watch | BOU | 10 hr |
| May 11, 10:46 AM MDT | Winter Storm Warning | BOU | 19 hr |
| May 11, 12:25 PM MDT | Areal Flood Advisory | BOU | 6 hr |
| May 18, 4:10 AM MDT | Flash Flood Watch | BOU | 16 hr |
| May 18, 4:43 AM MDT | Winter Storm Warning | BOU | 24 hr |
| May 18, 4:43 AM MDT | Winter Weather Advisory | BOU | 24 hr |
| May 20, 4:28 AM MDT | Winter Weather Advisory | BOU | 12 hr |
| May 23, 2:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| May 29, 3:35 PM MDT | High Wind Watch | BOU | 14 hr |
| Jun 8, 8:36 PM MDT | Special Weather Statement | BOU | 24 min |
| Jun 15, 6:50 PM MDT | Red Flag Warning | BOU | 25 hr |
| Jun 19, 11:42 AM MDT | Winter Weather Advisory | BOU | 23 hr |
| Jun 19, 9:34 PM MDT | Areal Flood Advisory | BOU | 86 min |
| Jun 19, 11:00 PM MDT | Areal Flood Advisory | BOU | 7 hr |
| Jun 28, 2:59 PM MDT | Fire Weather Watch | BOU | 25 hr |
| Jun 29, 3:48 PM MDT | Red Flag Warning | BOU | 28 hr |
| Jun 30, 11:57 AM MDT | Mesoscale Discussion | SPC | 63 min |
| Jun 30, 12:18 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
| Jun 30, 1:49 PM MDT | Mesoscale Discussion | SPC | 116 min |
| Jun 30, 4:17 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jun 30, 6:04 PM MDT | Severe Thunderstorm Warning | BOU | 27 min |
| Jun 30, 7:25 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 2, 12:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 5, 3:15 AM MDT | Flash Flood Watch | BOU | 23 hr |
| Jul 6, 3:48 AM MDT | Flash Flood Watch | BOU | 15 hr |
| Jul 6, 2:38 PM MDT | Mesoscale Discussion | SPC | 67 min |
| Jul 7, 4:08 PM MDT | Severe Thunderstorm Warning | BOU | 46 min |
| Jul 7, 4:46 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 7, 6:07 PM MDT | Areal Flood Advisory | BOU | 83 min |
| Jul 7, 6:18 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 7, 6:27 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 7, 7:28 PM MDT | Areal Flood Advisory | BOU | 2 hr |
| Jul 8, 1:43 PM MDT | Mesoscale Discussion | SPC | 92 min |
| Jul 8, 7:18 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 9, 4:12 PM MDT | Special Weather Statement | BOU | 63 min |
| Jul 10, 2:12 PM MDT | Severe Thunderstorm Warning | BOU | 48 min |
| Jul 10, 5:58 PM MDT | Areal Flood Advisory | BOU | 92 min |
| Jul 11, 3:05 PM MDT | Special Weather Statement | BOU | 55 min |
| Jul 11, 4:15 PM MDT | Areal Flood Advisory | BOU | 60 min |
| Jul 12, 3:49 AM MDT | Flash Flood Watch | BOU | 25 hr |
| Jul 12, 2:07 PM MDT | Mesoscale Discussion | SPC | 53 min |
| Jul 12, 3:21 PM MDT | Special Weather Statement | BOU | 39 min |
| Jul 12, 9:40 PM MDT | Areal Flood Advisory | BOU | 95 min |
| Jul 13, 5:13 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 13, 5:53 PM MDT | Areal Flood Advisory | BOU | 82 min |
| Jul 13, 6:17 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 13, 7:13 PM MDT | Severe Thunderstorm Warning | BOU | 34 min |
| Jul 13, 8:08 PM MDT | Flash Flood Warning | BOU | 103 min |
| Jul 13, 8:12 PM MDT | Mesoscale Discussion | SPC | 63 min |
| Jul 13, 8:37 PM MDT | Areal Flood Advisory | BOU | 75 min |
| Jul 13, 11:15 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 13, 11:16 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 14, 5:25 AM MDT | Flash Flood Watch | BOU | 16 hr |
| Jul 14, 1:00 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 14, 1:14 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 14, 2:09 PM MDT | Flash Flood Warning | BOU | 2 hr |
| Jul 14, 2:43 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jul 14, 5:10 PM MDT | Areal Flood Advisory | BOU | 55 min |
| Jul 16, 1:35 PM MDT | Special Weather Statement | BOU | 25 min |
| Jul 16, 3:17 PM MDT | Areal Flood Advisory | BOU | 32 min |
| Jul 16, 3:46 PM MDT | Flash Flood Warning | BOU | 89 min |
| Jul 16, 3:47 PM MDT | Mesoscale Discussion | SPC | 58 min |
| Jul 17, 12:55 PM MDT | Areal Flood Advisory | BOU | 80 min |
| Jul 17, 3:33 PM MDT | Special Weather Statement | BOU | 27 min |
| Jul 17, 3:37 PM MDT | Areal Flood Advisory | BOU | 83 min |
| Jul 17, 3:44 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 17, 3:59 PM MDT | Special Weather Statement | BOU | 31 min |
| Jul 17, 4:16 PM MDT | Areal Flood Advisory | BOU | 89 min |
| Jul 17, 4:31 PM MDT | Special Weather Statement | BOU | 29 min |
| Jul 17, 4:57 PM MDT | Special Weather Statement | BOU | 33 min |
| Jul 17, 5:01 PM MDT | Areal Flood Advisory | BOU | 89 min |
| Jul 17, 5:25 PM MDT | Special Weather Statement | BOU | 35 min |
| Jul 19, 11:13 AM MDT | Flash Flood Watch | BOU | 9 hr |
| Jul 19, 3:27 PM MDT | Flash Flood Warning | BOU | 2 hr |
| Jul 19, 6:14 PM MDT | Flash Flood Warning | BOU | 42 min |
| Jul 25, 1:32 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jul 31, 7:19 PM MDT | Areal Flood Advisory | BOU | 62 min |
| Aug 2, 4:17 AM MDT | Flash Flood Watch | BOU | 16 hr |
| Aug 4, 4:52 PM MDT | Areal Flood Advisory | BOU | 83 min |
| Aug 16, 1:48 PM MDT | Mesoscale Discussion | SPC | 117 min |
| Sep 14, 2:53 PM MDT | Winter Weather Advisory | BOU | 13 hr |
| Sep 14, 8:54 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Sep 14, 11:47 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Sep 21, 4:00 PM MDT | Frost Advisory | BOU | 16 hr |
| Oct 5, 3:35 PM MDT | Winter Weather Advisory | BOU | 28 hr |
| Oct 6, 4:27 AM MDT | Red Flag Warning | BOU | 16 hr |
| Oct 7, 5:00 AM MDT | Winter Storm Watch | BOU | 7 hr |
| Oct 7, 12:20 PM MDT | Winter Weather Advisory | BOU | 30 hr |
| Oct 8, 2:07 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 9, 1:45 PM MDT | Frost Advisory | BOU | 18 hr |
| Oct 15, 4:25 AM MDT | Red Flag Warning | BOU | 16 hr |
| Oct 16, 12:03 PM MDT | Winter Weather Advisory | BOU | 26 hr |
| Oct 17, 4:49 AM MDT | Freeze Warning | BOU | 27 hr |
| Oct 18, 10:40 AM MDT | Freeze Warning | BOU | 21 hr |
| Oct 23, 3:29 PM MDT | Winter Storm Watch | BOU | 36 hr |
| Oct 25, 3:49 AM MDT | Winter Storm Warning | BOU | 37 hr |
| Oct 25, 5:56 PM MDT | Mesoscale Discussion | SPC | 4 hr |
| Oct 27, 4:17 AM MDT | Dense Fog Advisory | BOU | 5 hr |
| Oct 31, 5:02 AM MDT | Winter Storm Watch | BOU | 24 hr |
| Nov 1, 5:12 AM MDT | Winter Weather Advisory | BOU | 29 hr |
| Nov 1, 10:54 AM MDT | Winter Storm Warning | BOU | 25 hr |
| Nov 1, 7:13 PM MDT | Mesoscale Discussion | SPC | 5 hr |
| Nov 10, 3:23 PM MST | High Wind Watch | BOU | 12 hr |
| Nov 10, 3:39 PM MST | Winter Storm Watch | BOU | 19 hr |
| Nov 11, 3:04 AM MST | High Wind Warning | BOU | 51 hr |
| Nov 11, 10:23 AM MST | Winter Storm Warning | BOU | 62 hr |
| Nov 14, 9:46 AM MST | Red Flag Warning | BOU | 7 hr |
| Nov 18, 5:14 AM MST | High Wind Watch | BOU | 10 hr |
| Nov 18, 3:28 PM MST | High Wind Warning | BOU | 12 hr |
| Nov 29, 12:14 PM MST | Winter Storm Watch | BOU | 23 hr |
| Nov 30, 11:27 AM MST | Winter Weather Advisory | BOU | 27 hr |
| Dec 2, 7:57 PM MST | Winter Weather Advisory | BOU | 18 hr |
| Dec 3, 3:20 PM MST | Winter Weather Advisory | BOU | 32 hr |
| Dec 9, 7:20 PM MST | Dense Fog Advisory | BOU | 8 hr |
| Dec 20, 2:00 PM MST | Winter Storm Watch | BOU | 15 hr |
| Dec 21, 4:33 AM MST | Winter Storm Warning | BOU | 30 hr |
| Dec 21, 4:33 AM MST | Winter Weather Advisory | BOU | 30 hr |
| Dec 22, 3:04 AM MST | Mesoscale Discussion | SPC | 3 hr |
| Dec 28, 5:24 AM MST | High Wind Watch | BOU | 5 hr |
| Dec 28, 10:32 AM MST | High Wind Warning | BOU | 30 hr |
| Dec 29, 3:03 PM MST | High Wind Watch | BOU | 19 hr |
| Dec 30, 10:15 AM MST | High Wind Warning | BOU | 31 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 | 4 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 18 |
| Special Weather Statement | 10 |
| Flooding | |
| Flash Flood Warning | 12 |
| Flash Flood Watch | 8 |
| Areal Flood Advisory | 22 |
| Winter | |
| Winter Storm Warning | 11 |
| Winter Storm Watch | 12 |
| Winter Weather Advisory | 35 |
| Cold | |
| Freeze Warning | 3 |
| Wind Chill Warning | 1 |
| Frost Advisory | 2 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 7 |
| High Wind Watch | 8 |
| Fire | |
| Red Flag Warning | 18 |
| Fire Weather Watch | 8 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.