Alert archive / Colorado / Larimer County
Weather alerts in Larimer County, Colorado, 2026
172 weather alerts in 2026, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Larimer County and its neighbors
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Alerts
- 172
- Warnings
- 61
- Watches
- 40
- Advisories
- 40
- Busiest month
- March29 alerts
- Busiest day
- July 22, 202610 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, 2:34 PM MST | Winter Weather Advisory | BOU | 44 hr |
| Jan 14, 2:25 AM MST | Fire Weather Watch | BOU | 11 hr |
| Jan 14, 1:47 PM MST | Fire Weather Watch | BOU | 20 hr |
| Jan 14, 1:47 PM MST | Red Flag Warning | BOU | 28 hr |
| Jan 15, 10:01 AM MST | Red Flag Warning | BOU | 32 hr |
| Jan 15, 10:38 AM MST | High Wind Warning | BOU | 30 hr |
| Jan 23, 2:04 PM MST | Cold Weather Advisory | BOU | 67 hr |
| Jan 25, 1:02 PM MST | Winter Weather Advisory | BOU | 6 hr |
| Feb 6, 12:05 PM MST | Red Flag Warning | BOU | 29 hr |
| Feb 8, 2:09 AM MST | Fire Weather Watch | BOU | 21 hr |
| Feb 8, 10:55 PM MST | Red Flag Warning | BOU | 18 hr |
| Feb 10, 11:58 AM MST | Winter Weather Advisory | BOU | 47 hr |
| Feb 13, 12:30 PM MST | Fire Weather Watch | BOU | 72 hr |
| Feb 15, 12:24 PM MST | Winter Weather Advisory | BOU | 4 days |
| Feb 16, 12:13 PM MST | Red Flag Warning | BOU | 31 hr |
| Feb 16, 12:22 PM MST | High Wind Warning | BOU | 29 hr |
| Feb 17, 7:33 AM MST | Snow Squall Warning | BOU | 42 min |
| Feb 17, 8:17 AM MST | Snow Squall Warning | BOU | 22 min |
| Feb 17, 4:26 PM MST | Special Weather Statement | BOU | 49 min |
| Feb 17, 10:51 PM MST | High Wind Watch | BOU | 12 hr |
| Feb 18, 11:02 AM MST | High Wind Warning | BOU | 16 hr |
| Feb 22, 12:34 PM MST | High Wind Watch | BOU | 24 hr |
| Feb 23, 11:59 AM MST | Red Flag Warning | BOU | 29 hr |
| Feb 23, 12:26 PM MST | High Wind Warning | BOU | 30 hr |
| Feb 23, 12:44 PM MST | Winter Storm Warning | BOU | 59 hr |
| Feb 23, 12:44 PM MST | Winter Weather Advisory | BOU | 59 hr |
| Feb 24, 11:57 AM MST | Red Flag Warning | BOU | 30 hr |
| Feb 25, 1:00 AM MST | Fire Weather Watch | BOU | 26 hr |
| Feb 26, 3:16 AM MST | Fire Weather Watch | BOU | 8 hr |
| Feb 26, 11:04 AM MST | Red Flag Warning | BOU | 31 hr |
| Feb 27, 11:06 AM MST | Red Flag Warning | BOU | 31 hr |
| Mar 3, 3:51 AM MST | Winter Weather Advisory | BOU | 11 hr |
| Mar 4, 12:30 PM MST | Winter Storm Watch | BOU | 11 hr |
| Mar 4, 12:30 PM MST | Winter Weather Advisory | BOU | 58 hr |
| Mar 4, 11:03 PM MST | Winter Storm Warning | BOU | 46 hr |
| Mar 10, 2:26 AM MDT | Red Flag Warning | BOU | 11 hr |
| Mar 10, 9:51 AM MDT | High Wind Watch | BOU | 38 hr |
| Mar 10, 1:06 PM MDT | Fire Weather Watch | BOU | 24 hr |
| Mar 11, 1:00 PM MDT | High Wind Warning | BOU | 47 hr |
| Mar 11, 1:22 PM MDT | Red Flag Warning | BOU | 32 hr |
| Mar 11, 11:23 PM MDT | Fire Weather Watch | BOU | 13 hr |
| Mar 12, 12:50 PM MDT | Fire Weather Watch | BOU | 8 hr |
| Mar 12, 12:50 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 12, 8:58 PM MDT | Red Flag Warning | BOU | 48 hr |
| Mar 12, 11:12 PM MDT | Winter Weather Advisory | BOU | 61 hr |
| Mar 15, 12:53 AM MDT | Special Weather Statement | BOU | 52 min |
| Mar 15, 10:38 PM MDT | Fire Weather Watch | BOU | 15 hr |
| Mar 16, 1:55 PM MDT | Red Flag Warning | BOU | 30 hr |
| Mar 16, 11:49 PM MDT | Fire Weather Watch | BOU | 13 hr |
| Mar 17, 1:09 PM MDT | Red Flag Warning | BOU | 30 hr |
| Mar 17, 10:26 PM MDT | Fire Weather Watch | BOU | 14 hr |
| Mar 18, 12:29 PM MDT | Red Flag Warning | BOU | 31 hr |
| Mar 18, 7:06 PM MDT | Red Flag Warning | BOU | 54 min |
| Mar 19, 2:16 AM MDT | Fire Weather Watch | BOU | 12 hr |
| Mar 19, 2:16 AM MDT | Fire Weather Watch | BOU | 35 hr |
| Mar 19, 1:57 PM MDT | Red Flag Warning | BOU | 29 hr |
| Mar 20, 12:46 PM MDT | Red Flag Warning | BOU | 33 hr |
| Mar 29, 3:00 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Mar 29, 12:19 PM MDT | Red Flag Warning | BOU | 32 hr |
| Mar 30, 11:40 AM MDT | Winter Weather Advisory | BOU | 57 hr |
| Apr 2, 12:57 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 3, 6:13 PM MDT | Special Weather Statement | CYS | 77 min |
| Apr 10, 12:38 PM MDT | Fire Weather Watch | BOU | 35 hr |
| Apr 11, 11:13 PM MDT | Fire Weather Watch | BOU | 13 hr |
| Apr 11, 11:13 PM MDT | Red Flag Warning | BOU | 21 hr |
| Apr 12, 11:50 AM MDT | Red Flag Warning | BOU | 32 hr |
| Apr 15, 11:58 AM MDT | Freeze Watch | BOU | 23 hr |
| Apr 16, 11:02 AM MDT | Freeze Warning | BOU | 45 hr |
| Apr 16, 10:55 PM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 20, 11:42 AM MDT | Fire Weather Watch | BOU | 9 hr |
| Apr 20, 8:48 PM MDT | Red Flag Warning | BOU | 51 hr |
| Apr 21, 1:15 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Apr 22, 12:22 PM MDT | Red Flag Warning | BOU | 31 hr |
| Apr 22, 11:51 PM MDT | Fire Weather Watch | BOU | 14 hr |
| Apr 23, 1:41 PM MDT | Red Flag Warning | BOU | 30 hr |
| Apr 26, 12:53 PM MDT | Winter Weather Advisory | BOU | 17 hr |
| Apr 29, 12:22 PM MDT | Winter Weather Advisory | BOU | 39 hr |
| May 3, 1:43 PM MDT | Winter Storm Watch | BOU | 34 hr |
| May 4, 12:51 AM MDT | Winter Storm Warning | BOU | 61 hr |
| May 4, 12:59 PM MDT | Freeze Watch | BOU | 23 hr |
| May 5, 11:31 AM MDT | Freeze Warning | BOU | 44 hr |
| May 13, 12:47 AM MDT | Fire Weather Watch | BOU | 11 hr |
| May 13, 11:43 AM MDT | Red Flag Warning | BOU | 33 hr |
| May 17, 4:27 AM MDT | Winter Weather Advisory | BOU | 41 hr |
| May 17, 11:53 AM MDT | Freeze Watch | BOU | 24 hr |
| May 17, 5:10 PM MDT | Special Weather Statement | CYS | 35 min |
| May 17, 10:58 PM MDT | Winter Storm Warning | BOU | 22 hr |
| May 18, 11:36 AM MDT | Frost Advisory | BOU | 20 hr |
| May 28, 5:24 PM MDT | Special Weather Statement | BOU | 51 min |
| May 28, 6:15 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| May 29, 2:18 PM MDT | Special Weather Statement | CYS | 42 min |
| Jun 1, 12:52 PM MDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 1, 3:07 PM MDT | Severe Thunderstorm Warning | BOU | 38 min |
| Jun 1, 3:28 PM MDT | Severe Thunderstorm Warning | BOU | 18 min |
| Jun 3, 12:58 PM MDT | Special Weather Statement | BOU | 47 min |
| Jun 7, 12:32 PM MDT | Fire Weather Watch | BOU | 25 hr |
| Jun 15, 2:23 PM MDT | Fire Weather Watch | BOU | 21 hr |
| Jun 16, 11:38 AM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 18, 12:35 AM MDT | Fire Weather Watch | BOU | 35 hr |
| Jun 19, 11:29 AM MDT | Red Flag Warning | BOU | 34 hr |
| Jun 23, 12:05 PM MDT | Red Flag Warning | BOU | 30 hr |
| Jun 23, 1:57 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Jun 23, 4:39 PM MDT | Severe Thunderstorm Watch | SPC | 10 hr |
| Jun 24, 2:20 PM MDT | Mesoscale Discussion | SPC | 115 min |
| Jun 24, 7:47 PM MDT | Severe Thunderstorm Warning | BOU | 32 min |
| Jun 25, 12:18 AM MDT | Fire Weather Watch | BOU | 24 hr |
| Jun 25, 5:55 PM MDT | Severe Thunderstorm Warning | BOU | 50 min |
| Jun 26, 12:24 AM MDT | Red Flag Warning | BOU | 48 hr |
| Jun 26, 2:28 PM MDT | Fire Weather Watch | BOU | 23 hr |
| Jun 27, 1:11 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 29, 2:56 AM MDT | Fire Weather Watch | BOU | 10 hr |
| Jun 29, 12:48 PM MDT | Red Flag Warning | BOU | 32 hr |
| Jun 30, 2:38 PM MDT | Special Weather Statement | BOU | 37 min |
| Jul 3, 5:34 PM MDT | Special Weather Statement | BOU | 41 min |
| Jul 12, 1:11 PM MDT | Heat Advisory | BOU | 32 hr |
| Jul 17, 12:00 PM MDT | Heat Advisory | BOU | 3 days |
| Jul 20, 1:35 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 21, 4:56 PM MDT | Areal Flood Advisory | BOU | 4 hr |
| Jul 21, 6:22 PM MDT | Severe Thunderstorm Warning | BOU | 23 min |
| Jul 21, 7:21 PM MDT | Areal Flood Advisory | BOU | 114 min |
| Jul 21, 8:29 PM MDT | Areal Flood Advisory | BOU | 2 hr |
| Jul 21, 9:12 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 21, 11:53 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 22, 12:02 AM MDT | Severe Thunderstorm Warning | BOU | 17 min |
| Jul 22, 1:24 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 22, 2:09 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 22, 2:19 PM MDT | Mesoscale Discussion | SPC | 86 min |
| Jul 22, 3:19 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 23, 4:33 PM MDT | Special Weather Statement | CYS | 27 min |
| Jul 23, 6:41 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | 42 hr |
| Jul 24, 2:51 AM MDT | Heat Advisory | BOU | 66 hr |
| Jul 28, 12:25 PM MDT | Areal Flood Advisory | BOU | 59 min |
| Jul 28, 12:51 PM MDT | Areal Flood Advisory | BOU | 33 min |
| Jul 28, 1:01 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Jul 28, 1:27 PM MDT | Special Weather Statement | BOU | 48 min |
| Jul 28, 1:52 PM MDT | Severe Thunderstorm Warning | BOU | 26 min |
| Jul 28, 2:28 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 29, 3:10 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Jul 31, 2:15 AM MDT | Heat Advisory | BOU | 4 days |
| Aug 4, 1:39 AM MDT | Fire Weather Watch | BOU | 11 hr |
| Aug 4, 12:20 PM MDT | Red Flag Warning | BOU | 31 hr |
| Aug 6, 12:07 PM MDT | Heat Advisory | BOU | 3 days |
| Aug 13, 2:41 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 13, 7:25 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Aug 14, 3:17 PM MDT | Areal Flood Advisory | BOU | 25 min |
| Aug 14, 3:37 PM MDT | Flash Flood Warning | BOU | 3 hr |
| Aug 15, 1:06 AM MDT | Flood Watch | BOU | 19 hr |
| Aug 15, 1:28 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 21, 4:11 PM MDT | Special Weather Statement | BOU | 34 min |
| Aug 22, 1:15 PM MDT | Mesoscale Discussion | SPC | 3 hr |
| Aug 24, 1:36 PM MDT | Mesoscale Discussion | SPC | 114 min |
| Aug 26, 3:06 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Aug 26, 3:25 PM MDT | Severe Thunderstorm Warning | BOU | 42 min |
| Aug 26, 3:42 PM MDT | Severe Thunderstorm Warning | BOU | 22 min |
| Aug 26, 3:53 PM MDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Aug 26, 4:01 PM MDT | Severe Thunderstorm Warning | BOU | 25 min |
| Aug 26, 4:03 PM MDT | Areal Flood Advisory | BOU | 3 hr |
| Aug 27, 2:27 PM MDT | Severe Thunderstorm Warning | BOU | 33 min |
| Aug 27, 3:02 PM MDT | Mesoscale Discussion | SPC | 118 min |
| Aug 29, 1:26 PM MDT | Mesoscale Discussion | SPC | 2 hr |
| Aug 29, 1:29 PM MDT | Special Weather Statement | BOU | 46 min |
| Aug 29, 2:12 PM MDT | Special Weather Statement | BOU | 48 min |
| Aug 29, 2:14 PM MDT | Special Weather Statement | BOU | 46 min |
| Aug 29, 5:59 PM MDT | Special Weather Statement | BOU | 31 min |
| Sep 2, 3:00 PM MDT | Special Weather Statement | BOU | 30 min |
| Sep 6, 10:42 PM MDT | Special Weather Statement | BOU | 33 min |
| Sep 6, 10:52 PM MDT | Severe Thunderstorm Warning | BOU | 38 min |
| Sep 6, 11:23 PM MDT | Areal Flood Advisory | BOU | 2 hr |
| Sep 16, 1:25 PM MDT | Special Weather Statement | BOU | 35 min |
| Sep 16, 1:41 PM MDT | Special Weather Statement | BOU | 34 min |
| Sep 19, 3:56 PM MDT | Special Weather Statement | BOU | 49 min |
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 | 12 |
| Severe Thunderstorm Watch | 3 |
| Mesoscale Discussion | 10 |
| Special Weather Statement | 21 |
| Flooding | |
| Flash Flood Warning | 2 |
| Flood Watch | 1 |
| Areal Flood Advisory | 19 |
| Winter | |
| Snow Squall Warning | 2 |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 2 |
| Winter Weather Advisory | 13 |
| Heat | |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 2 |
| Freeze Watch | 3 |
| Cold Weather Advisory | 1 |
| Frost Advisory | 1 |
| Wind and dust | |
| High Wind Warning | 5 |
| High Wind Watch | 3 |
| Fire | |
| Red Flag Warning | 34 |
| Fire Weather Watch | 28 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive2025
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.