Alert archive / Colorado / Adams County
Weather alerts in Adams County, Colorado, 2022
148 weather alerts in 2022, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Adams County and its neighbors
Each county as a circle sized by its count in 2022. Tap one for its archive.
- Alerts
- 148
- Warnings
- 55
- Watches
- 29
- Advisories
- 31
- Busiest month
- April26 alerts
- Busiest day
- April 5, 20224 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
0 of 3 tornado warnings covering Adams County in 2022 had a tornado report inside them; 0 of 1 tornado reports fell inside a warning.
Adams County, 2022
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 3 | 0 | 100% | 1 | 0% | |
| Severe thunderstorm warnings | 9 | 4 | 56% | 2 | 0% | |
| Flash flood warnings | 1 | 1 | 0% | 1 | 100% | 40 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 1, 4:47 AM MST | Wind Chill Advisory | BOU | 27 hr |
| 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 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 |
| Feb 21, 3:32 AM MST | Wind Chill Advisory | BOU | 56 hr |
| Feb 23, 1:17 PM MST | Wind Chill Advisory | BOU | 19 hr |
| Mar 8, 3:05 AM MST | Winter Weather Advisory | BOU | 50 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, 2:59 PM MDT | High Wind Warning | BOU | 27 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 10, 1:15 PM MDT | High Wind Warning | BOU | 6 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 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 27, 3:26 PM MDT | Special Weather Statement | BOU | 49 min |
| Apr 28, 10:14 AM MDT | Red Flag Warning | BOU | 33 hr |
| Apr 28, 5:03 PM MDT | Fire Weather Watch | BOU | 11 hr |
| Apr 28, 11:38 PM MDT | Special Weather Statement | BOU | 37 min |
| Apr 29, 12:36 AM MDT | Special Weather Statement | BOU | 39 min |
| May 1, 7:28 PM MDT | Severe Thunderstorm Warning | BOU | 32 min |
| May 1, 11:24 PM MDT | Special Weather Statement | BOU | 51 min |
| 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, 3:06 PM MDT | Special Weather Statement | BOU | 39 min |
| 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 21, 2:43 PM MDT | Freeze Warning | BOU | 17 hr |
| May 27, 2:29 PM MDT | Special Weather Statement | BOU | 61 min |
| May 29, 11:52 AM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 3, 1:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 4, 2:17 PM MDT | Mesoscale Discussion | SPC | 88 min |
| Jun 4, 5:15 PM MDT | Special Weather Statement | BOU | 30 min |
| Jun 7, 12:26 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jun 7, 2:17 PM MDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Jun 7, 2:44 PM MDT | Severe Thunderstorm Warning | BOU | 46 min |
| Jun 7, 3:02 PM MDT | Severe Thunderstorm Warning | BOU | 43 min |
| Jun 12, 2:17 PM MDT | Tornado Warning | BOU | 22 min |
| Jun 14, 8:56 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 16, 2:54 PM MDT | Heat Advisory | BOU | 30 hr |
| Jun 18, 4:46 PM MDT | Special Weather Statement | BOU | 29 min |
| Jun 18, 5:13 PM MDT | Special Weather Statement | BOU | 32 min |
| Jul 3, 5:24 PM MDT | Severe Thunderstorm Warning | BOU | 36 min |
| Jul 4, 9:17 PM MDT | Special Weather Statement | BOU | 43 min |
| Jul 5, 3:28 PM MDT | Severe Thunderstorm Warning | BOU | 32 min |
| Jul 6, 12:06 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 6, 2:09 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jul 6, 3:19 PM MDT | Severe Thunderstorm Warning | BOU | 41 min |
| Jul 6, 4:32 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Jul 8, 2:13 PM MDT | Heat Advisory | BOU | 30 hr |
| Jul 8, 2:18 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 9, 7:34 PM MDT | Special Weather Statement | BOU | 41 min |
| Jul 9, 7:55 PM MDT | Severe Thunderstorm Warning | BOU | 35 min |
| Jul 12, 3:44 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jul 17, 1:50 PM MDT | Heat Advisory | BOU | 31 hr |
| Jul 21, 3:32 PM MDT | Heat Advisory | BOU | 28 hr |
| Jul 24, 2:16 PM MDT | Special Weather Statement | BOU | 44 min |
| Jul 24, 2:37 PM MDT | Mesoscale Discussion | SPC | 113 min |
| Jul 24, 3:01 PM MDT | Special Weather Statement | BOU | 59 min |
| Jul 26, 1:37 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Jul 26, 10:48 PM MDT | Areal Flood Advisory | BOU | 87 min |
| Jul 29, 4:30 PM MDT | Tornado Warning | BOU | 15 min |
| Aug 5, 3:49 PM MDT | Tornado Warning | BOU | 10 min |
| Aug 6, 1:37 PM MDT | Flood Watch | BOU | 34 hr |
| Aug 7, 6:52 PM MDT | Areal Flood Advisory | BOU | 83 min |
| Aug 7, 7:20 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Aug 14, 5:54 PM MDT | Special Weather Statement | BOU | 36 min |
| Aug 15, 3:50 PM MDT | Severe Thunderstorm Warning | BOU | 40 min |
| Aug 15, 3:52 PM MDT | Mesoscale Discussion | SPC | 83 min |
| Sep 2, 9:11 PM MDT | Severe Thunderstorm Warning | BOU | 49 min |
| Sep 2, 9:29 PM MDT | Special Weather Statement | BOU | 46 min |
| Sep 6, 2:23 PM MDT | Heat Advisory | BOU | 28 hr |
| Sep 7, 7:27 AM MDT | Heat Advisory | BOU | 37 hr |
| Sep 7, 3:19 PM MDT | Red Flag Warning | BOU | 29 hr |
| Sep 14, 5:01 PM MDT | Special Weather Statement | BOU | 44 min |
| Oct 1, 5:27 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Oct 8, 1:16 PM MDT | Frost Advisory | BOU | 19 hr |
| Oct 10, 4:02 PM MDT | Red Flag Warning | BOU | 27 hr |
| Oct 12, 2:32 PM MDT | Frost Advisory | BOU | 17 hr |
| Oct 13, 12:49 PM MDT | Red Flag Warning | BOU | 29 hr |
| Oct 15, 1:49 PM MDT | Freeze Watch | BOU | 12 hr |
| Oct 16, 1:40 AM MDT | Freeze Warning | BOU | 31 hr |
| Oct 16, 1:43 PM MDT | Frost Advisory | BOU | 19 hr |
| Oct 17, 2:05 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 18, 3:31 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Oct 18, 1:30 PM MDT | Red Flag Warning | BOU | 29 hr |
| Oct 21, 2:46 PM MDT | Red Flag Warning | BOU | 28 hr |
| Oct 22, 1:58 PM MDT | Red Flag Warning | BOU | 29 hr |
| Oct 22, 2:07 PM MDT | Freeze Watch | BOU | 24 hr |
| Oct 23, 2:19 PM MDT | Freeze Warning | BOU | 19 hr |
| Oct 24, 1:44 PM MDT | Freeze Warning | BOU | 18 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 28, 2:07 AM MST | Winter Weather Advisory | BOU | 39 hr |
| Dec 1, 2:36 AM MST | High Wind Watch | BOU | 11 hr |
| Dec 1, 2:36 AM MST | High Wind Warning | BOU | 38 hr |
| Dec 2, 10:11 AM MST | Blowing Dust Advisory | BOU | 7 hr |
| Dec 11, 3:56 AM MST | Winter Storm Watch | BOU | 32 hr |
| Dec 11, 3:56 AM MST | Winter Weather Advisory | BOU | 4 days |
| Dec 12, 2:57 AM MST | Blizzard Warning | BOU | 41 hr |
| Dec 13, 3:24 AM MST | Mesoscale Discussion | SPC | 5 hr |
| Dec 13, 10:14 AM MST | Mesoscale Discussion | SPC | 3 hr |
| Dec 19, 4:07 AM MST | Wind Chill Watch | BOU | 35 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 23, 3:06 AM MST | Wind Chill Advisory | BOU | 29 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.
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.