Alert archive / Colorado / Broomfield County
Weather alerts in Broomfield County, Colorado, 2022
108 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Broomfield County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 108
- Warnings
- 35
- Watches
- 25
- Advisories
- 24
- Busiest month
- April22 alerts
- Busiest day
- April 4, 20223 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Broomfield County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 0 | 0 | ||||
| Flash flood warnings | 1 | 1 | 0% | 2 | 100% | 12 min |
Each office's whole area, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Denver/Boulder, CO: tornado warnings | 15 | 4 | 73% | 13 | 31% | 12 min |
| NWS Denver/Boulder, CO: severe thunderstorm warnings | 139 | 43 | 69% | 123 | 66% | 20 min |
| NWS Denver/Boulder, CO: flash flood warnings | 63 | 17 | 73% | 38 | 76% | 62 min |
An office's figures cover every county it serves, including across state lines.
Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.
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 4, 2:54 PM MST | Winter Weather Advisory | BOU | 44 hr |
| Jan 5, 4:12 AM MST | Wind Chill Advisory | BOU | 28 hr |
| Jan 18, 2:49 PM MST | Winter Weather Advisory | BOU | 29 hr |
| Jan 21, 9:03 AM MST | Winter Weather Advisory | BOU | 15 hr |
| Jan 24, 3:46 AM MST | Winter Weather Advisory | BOU | 37 hr |
| Jan 27, 3:55 AM MST | Winter Weather Advisory | BOU | 11 hr |
| Jan 31, 2:15 PM MST | Winter Weather Advisory | BOU | 54 hr |
| Feb 1, 2:32 AM MST | Winter Storm Warning | BOU | 32 hr |
| Feb 11, 2:28 AM MST | Winter Weather Advisory | BOU | 21 hr |
| Feb 15, 2:07 PM MST | Winter Storm Watch | BOU | 13 hr |
| Feb 16, 3:32 AM MST | Winter Storm Warning | BOU | 23 hr |
| Feb 16, 4:18 PM MST | Mesoscale Discussion | SPC | 4 hr |
| Mar 8, 3:05 AM MST | Winter Weather Advisory | BOU | 50 hr |
| Mar 15, 2:54 PM MDT | Winter Storm Watch | BOU | 14 hr |
| Mar 16, 4:46 AM MDT | Winter Storm Warning | BOU | 31 hr |
| Mar 16, 4:46 AM MDT | Winter Weather Advisory | BOU | 31 hr |
| Apr 4, 4:08 AM MDT | High Wind Watch | BOU | 25 hr |
| Apr 4, 4:08 AM MDT | High Wind Warning | BOU | 41 hr |
| Apr 4, 2:55 PM MDT | Fire Weather Watch | BOU | 5 hr |
| Apr 4, 7:58 PM MDT | Red Flag Warning | BOU | 25 hr |
| Apr 5, 4:00 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Apr 5, 3:23 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 6, 3:17 AM MDT | Red Flag Warning | BOU | 41 hr |
| Apr 8, 4:49 AM MDT | Fire Weather Watch | BOU | 24 hr |
| Apr 8, 1:44 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 9, 4:44 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Apr 9, 2:01 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 13, 2:14 PM MDT | Red Flag Warning | BOU | 29 hr |
| Apr 15, 2:23 AM MDT | Red Flag Warning | BOU | 17 hr |
| Apr 16, 4:41 AM MDT | Fire Weather Watch | BOU | 23 hr |
| Apr 16, 2:08 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 19, 12:31 AM MDT | Red Flag Warning | BOU | 19 hr |
| Apr 20, 1:08 PM MDT | Fire Weather Watch | BOU | 13 hr |
| Apr 20, 1:13 PM MDT | High Wind Watch | BOU | 24 hr |
| Apr 21, 2:14 AM MDT | Red Flag Warning | BOU | 43 hr |
| Apr 21, 1:32 PM MDT | High Wind Warning | BOU | 31 hr |
| Apr 28, 10:14 AM MDT | Red Flag Warning | BOU | 33 hr |
| Apr 28, 5:03 PM MDT | Fire Weather Watch | BOU | 11 hr |
| May 5, 2:47 PM MDT | Fire Weather Watch | BOU | 24 hr |
| May 6, 2:27 PM MDT | Red Flag Warning | BOU | 31 hr |
| May 7, 9:27 PM MDT | Red Flag Warning | BOU | 46 hr |
| May 8, 3:53 AM MDT | Fire Weather Watch | BOU | 24 hr |
| May 9, 3:59 AM MDT | Fire Weather Watch | BOU | 10 hr |
| May 9, 2:17 PM MDT | Fire Weather Watch | BOU | 24 hr |
| May 10, 2:09 PM MDT | Red Flag Warning | BOU | 31 hr |
| May 11, 4:40 AM MDT | Fire Weather Watch | BOU | 22 hr |
| May 11, 2:18 PM MDT | Red Flag Warning | BOU | 30 hr |
| May 12, 8:23 PM MDT | Fire Weather Watch | BOU | 6 hr |
| May 13, 2:23 AM MDT | Red Flag Warning | BOU | 18 hr |
| May 17, 3:12 PM MDT | Fire Weather Watch | BOU | 23 hr |
| May 18, 4:09 AM MDT | Winter Storm Watch | BOU | 34 hr |
| May 18, 2:16 PM MDT | Red Flag Warning | BOU | 30 hr |
| May 19, 3:55 AM MDT | Winter Storm Warning | BOU | 55 hr |
| May 19, 3:55 AM MDT | Winter Weather Advisory | BOU | 55 hr |
| May 20, 2:42 AM MDT | Freeze Warning | BOU | 31 hr |
| May 20, 4:26 PM MDT | Mesoscale Discussion | SPC | 6 hr |
| May 21, 2:43 PM MDT | Freeze Warning | BOU | 17 hr |
| May 29, 11:52 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 12:05 PM MDT | Special Weather Statement | BOU | 25 min |
| May 29, 12:21 PM MDT | Special Weather Statement | BOU | 24 min |
| Jun 3, 1:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 2:54 PM MDT | Heat Advisory | BOU | 30 hr |
| Jun 19, 2:09 PM MDT | Special Weather Statement | BOU | 51 min |
| Jul 6, 12:06 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 8, 2:13 PM MDT | Heat Advisory | BOU | 30 hr |
| Jul 8, 2:18 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 3:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 12, 4:57 PM MDT | Special Weather Statement | BOU | 48 min |
| Jul 17, 1:50 PM MDT | Heat Advisory | BOU | 31 hr |
| Jul 20, 4:36 PM MDT | Special Weather Statement | BOU | 24 min |
| Jul 21, 3:32 PM MDT | Heat Advisory | BOU | 28 hr |
| Jul 24, 2:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 26, 3:23 PM MDT | Special Weather Statement | BOU | 22 min |
| Jul 26, 3:44 PM MDT | Special Weather Statement | BOU | 31 min |
| Jul 26, 8:28 PM MDT | Special Weather Statement | BOU | 32 min |
| Jul 28, 8:53 AM MDT | Flood Watch | BOU | 11 hr |
| Aug 6, 1:37 PM MDT | Flood Watch | BOU | 34 hr |
| Aug 6, 4:24 PM MDT | Special Weather Statement | BOU | 51 min |
| Aug 7, 1:37 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 14, 3:40 PM MDT | Special Weather Statement | BOU | 35 min |
| Aug 16, 7:57 AM MDT | Areal Flood Advisory | BOU | 21 min |
| Aug 16, 8:18 AM MDT | Flash Flood Warning | BOU | 3 hr |
| Aug 20, 4:08 PM MDT | Special Weather Statement | BOU | 37 min |
| Aug 20, 4:35 PM MDT | Special Weather Statement | BOU | 40 min |
| Sep 6, 2:23 PM MDT | Heat Advisory | BOU | 28 hr |
| Sep 7, 7:27 AM MDT | Heat Advisory | BOU | 37 hr |
| Oct 1, 3:32 PM MDT | Special Weather Statement | BOU | 43 min |
| Oct 1, 5:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 16, 1:43 PM MDT | Frost Advisory | BOU | 19 hr |
| Oct 21, 2:46 PM MDT | Red Flag Warning | BOU | 28 hr |
| Oct 22, 2:07 PM MDT | Freeze Watch | BOU | 24 hr |
| Oct 23, 2:19 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 27, 3:31 AM MDT | Freeze Watch | BOU | 9 hr |
| Oct 27, 12:06 PM MDT | Freeze Warning | BOU | 21 hr |
| Nov 7, 2:10 PM MST | Fire Weather Watch | BOU | 24 hr |
| Nov 8, 2:37 PM MST | Red Flag Warning | BOU | 28 hr |
| Nov 16, 1:55 AM MST | Winter Weather Advisory | BOU | 55 hr |
| Nov 17, 8:34 AM MST | Winter Storm Warning | BOU | 24 hr |
| Nov 28, 2:07 AM MST | Winter Weather Advisory | BOU | 39 hr |
| Dec 1, 2:36 AM MST | High Wind Warning | BOU | 38 hr |
| Dec 11, 3:56 AM MST | Winter Weather Advisory | BOU | 4 days |
| Dec 19, 4:07 AM MST | Wind Chill Watch | BOU | 35 hr |
| Dec 19, 2:21 PM MST | Red Flag Warning | BOU | 4 hr |
| Dec 20, 2:59 PM MST | Wind Chill Warning | BOU | 68 hr |
| Dec 20, 2:59 PM MST | Winter Weather Advisory | BOU | 42 hr |
| Dec 26, 1:41 PM MST | Winter Weather Advisory | BOU | 66 hr |
| Dec 28, 7:33 PM MST | Winter Storm Warning | BOU | 10 hr |
| Dec 28, 8:44 PM MST | Mesoscale Discussion | SPC | 3 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 | |
| Mesoscale Discussion | 11 |
| Special Weather Statement | 13 |
| Flooding | |
| Flash Flood Warning | 1 |
| Flood Watch | 2 |
| Areal Flood Advisory | 1 |
| Winter | |
| Winter Storm Warning | 6 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 15 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 4 |
| Wind Chill Warning | 1 |
| Freeze Watch | 2 |
| Wind Chill Watch | 1 |
| Frost Advisory | 1 |
| Wind Chill Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 3 |
| High Wind Watch | 2 |
| Fire | |
| Red Flag Warning | 20 |
| Fire Weather Watch | 15 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20212023
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. Warning verification from the Mesonet's Cow. Rebuilt daily.