Alert archive / Colorado / Severe Thunderstorm Warnings / 2026
Severe Thunderstorm Warnings in Colorado, September 2026
122 severe thunderstorm warnings in September 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of severe thunderstorm warnings reaches back to 1986.
Severe Thunderstorm Warnings by county
Each county as a circle sized by its count in September 2026. Tap one for its archive.
- Severe Thunderstorm Warnings
- 122
- Busiest day
- September 21, 202625 severe thunderstorm warnings
Over time
By day
Days in UTC, the clock the archive keeps.
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 | Counties | Lasted |
|---|---|---|---|---|
| Aug 31, 6:26 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 49 min |
| Aug 31, 6:41 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 49 min |
| Aug 31, 6:50 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 25 min |
| Aug 31, 7:13 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 62 min |
| Aug 31, 7:28 PM MDT | Severe Thunderstorm Warning | PUB | Prowers | 32 min |
| Sep 5, 4:31 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 44 min |
| Sep 5, 4:46 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 44 min |
| Sep 5, 5:11 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips, Sedgwick | 49 min |
| Sep 5, 5:34 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Sedgwick | 26 min |
| Sep 5, 8:09 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Weld | 36 min |
| Sep 5, 9:22 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 23 min |
| Sep 5, 9:58 PM MDT | Severe Thunderstorm Warning | BOU | Logan | 38 min |
| Sep 6, 6:54 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 26 min |
| Sep 6, 7:17 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 28 min |
| Sep 6, 10:52 PM MDT | Severe Thunderstorm Warning | BOU | Larimer, Weld | 38 min |
| Sep 7, 5:39 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Morgan, Washington | 51 min |
| Sep 7, 6:43 PM MDT | Severe Thunderstorm Warning | BOU | Morgan, Weld | 28 min |
| Sep 8, 6:57 PM MDT | Severe Thunderstorm Warning | PUB | Pueblo | 48 min |
| Sep 8, 8:24 PM MDT | Severe Thunderstorm Warning | PUB | Crowley, Otero, Pueblo | 36 min |
| Sep 8, 8:30 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Prowers | 45 min |
| Sep 8, 9:17 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 43 min |
| Sep 9, 10:05 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas, Otero | 25 min |
| Sep 9, 10:17 PM MDT | Severe Thunderstorm Warning | PUB | Otero | 28 min |
| Sep 9, 10:28 PM MDT | Severe Thunderstorm Warning | PUB | Otero | 32 min |
| Sep 9, 10:54 PM MDT | Severe Thunderstorm Warning | PUB | Custer, El Paso, Fremont, Pueblo | 36 min |
| Sep 9, 10:55 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 35 min |
| Sep 9, 11:16 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas, Otero | 29 min |
| Sep 9, 11:19 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 41 min |
| Sep 9, 11:24 PM MDT | Severe Thunderstorm Warning | PUB | Fremont, Pueblo | 36 min |
| Sep 9, 11:26 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 34 min |
| Sep 9, 11:27 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 48 min |
| Sep 9, 11:35 PM MDT | Severe Thunderstorm Warning | PUB | Huerfano, Pueblo | 25 min |
| Sep 9, 11:56 PM MDT | Severe Thunderstorm Warning | PUB | Huerfano, Pueblo | 34 min |
| Sep 10, 12:12 AM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 28 min |
| Sep 10, 12:27 AM MDT | Severe Thunderstorm Warning | PUB | Huerfano, Las Animas | 33 min |
| Sep 10, 12:31 AM MDT | Severe Thunderstorm Warning | PUB | Crowley, Kiowa | 14 min |
| Sep 10, 12:38 AM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 21 min |
| Sep 13, 3:55 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas, Otero | 35 min |
| Sep 13, 4:34 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas | 26 min |
| Sep 13, 5:11 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas | 34 min |
| Sep 14, 1:11 PM MDT | Severe Thunderstorm Warning | GJT | Archuleta, La Plata | 34 min |
| Sep 14, 1:25 PM MDT | Severe Thunderstorm Warning | GJT | Montrose, Ouray, San Miguel | 16 min |
| Sep 14, 2:01 PM MDT | Severe Thunderstorm Warning | GJT | Dolores, San Miguel | 29 min |
| Sep 14, 3:36 PM MDT | Severe Thunderstorm Warning | GJT | Archuleta, La Plata | 24 min |
| Sep 14, 3:58 PM MDT | Severe Thunderstorm Warning | GJT | Archuleta, La Plata | 32 min |
| Sep 14, 4:26 PM MDT | Severe Thunderstorm Warning | PUB | Baca | 34 min |
| Sep 14, 7:53 PM MDT | Severe Thunderstorm Warning | GJT | Delta, Mesa | 37 min |
| Sep 15, 1:12 PM MDT | Severe Thunderstorm Warning | GJT | Montrose, Ouray, San Miguel | 33 min |
| Sep 15, 6:13 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Mesa | 32 min |
| Sep 15, 6:52 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Mesa | 23 min |
| Sep 18, 3:40 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 65 min |
| Sep 18, 4:31 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 59 min |
| Sep 18, 4:41 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 34 min |
| Sep 18, 4:47 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 28 min |
| Sep 18, 4:55 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Rio Blanco | 35 min |
| Sep 18, 5:15 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 30 min |
| Sep 18, 5:43 PM MDT | Severe Thunderstorm Warning | GJT | Moffat | 32 min |
| Sep 18, 6:14 PM MDT | Severe Thunderstorm Warning | GJT | Moffat | 31 min |
| Sep 18, 6:42 PM MDT | Severe Thunderstorm Warning | GJT | Moffat | 33 min |
| Sep 19, 1:23 PM MDT | Severe Thunderstorm Warning | BOU | Arapahoe, Elbert | 52 min |
| Sep 19, 1:46 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe | 29 min |
| Sep 19, 2:08 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Elbert | 52 min |
| Sep 19, 2:16 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 44 min |
| Sep 19, 2:43 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 47 min |
| Sep 19, 3:07 PM MDT | Severe Thunderstorm Warning | GJT | Delta, Mesa | 23 min |
| Sep 19, 3:14 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 46 min |
| Sep 19, 3:14 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas, Otero | 31 min |
| Sep 19, 3:52 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 38 min |
| Sep 19, 3:53 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 52 min |
| Sep 19, 4:19 PM MDT | Severe Thunderstorm Warning | PUB | Baca, Las Animas | 26 min |
| Sep 19, 4:37 PM MDT | Severe Thunderstorm Warning | PUB | Baca, Las Animas | 38 min |
| Sep 19, 4:43 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 32 min |
| Sep 19, 5:07 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 38 min |
| Sep 19, 5:38 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 37 min |
| Sep 19, 5:55 PM MDT | Severe Thunderstorm Warning | BOU | Adams, Arapahoe, Denver, Douglas, Elbert | 29 min |
| Sep 19, 5:56 PM MDT | Severe Thunderstorm Warning | GJT | Rio Blanco | 34 min |
| Sep 19, 6:04 PM MDT | Severe Thunderstorm Warning | PUB | Baca | 26 min |
| Sep 19, 6:10 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 65 min |
| Sep 19, 6:12 PM MDT | Severe Thunderstorm Warning | GJT | Garfield, Rio Blanco | 33 min |
| Sep 19, 6:46 PM MDT | Severe Thunderstorm Warning | GJT | Moffat, Rio Blanco | 29 min |
| Sep 19, 6:58 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 32 min |
| Sep 19, 7:33 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 27 min |
| Sep 20, 12:49 PM MDT | Severe Thunderstorm Warning | BOU | Logan, Phillips | 41 min |
| Sep 20, 1:25 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 50 min |
| Sep 20, 2:03 PM MDT | Severe Thunderstorm Warning | GLD | Yuma | 42 min |
| Sep 20, 2:05 PM MDT | Severe Thunderstorm Warning | BOU | Phillips | 32 min |
| Sep 20, 2:30 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 45 min |
| Sep 20, 3:01 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 44 min |
| Sep 20, 3:41 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 34 min |
| Sep 20, 3:45 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 60 min |
| Sep 20, 4:26 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne | 64 min |
| Sep 20, 5:04 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 41 min |
| Sep 20, 5:42 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Kiowa, Prowers | 48 min |
| Sep 20, 6:29 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa, Prowers | 46 min |
| Sep 20, 8:47 PM MDT | Severe Thunderstorm Warning | GLD | Kit Carson | 43 min |
| Sep 20, 8:53 PM MDT | Severe Thunderstorm Warning | PUB | El Paso | 37 min |
| Sep 20, 9:23 PM MDT | Severe Thunderstorm Warning | PUB | El Paso, Pueblo | 37 min |
| Sep 20, 9:29 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 31 min |
| Sep 20, 9:39 PM MDT | Severe Thunderstorm Warning | PUB | Crowley, El Paso, Pueblo | 51 min |
| Sep 20, 9:43 PM MDT | Severe Thunderstorm Warning | PUB | Fremont, Pueblo | 32 min |
| Sep 20, 9:52 PM MDT | Severe Thunderstorm Warning | BOU | Douglas, Elbert | 26 min |
| Sep 20, 9:54 PM MDT | Severe Thunderstorm Warning | PUB | El Paso, Pueblo | 36 min |
| Sep 20, 9:56 PM MDT | Severe Thunderstorm Warning | GLD | Cheyenne, Kit Carson | 49 min |
| Sep 20, 10:06 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 39 min |
| Sep 20, 10:09 PM MDT | Severe Thunderstorm Warning | BOU | Weld | 38 min |
| Sep 20, 10:12 PM MDT | Severe Thunderstorm Warning | PUB | Fremont, Pueblo | 33 min |
| Sep 20, 10:20 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Crowley, Otero, Pueblo | 40 min |
| Sep 20, 10:23 PM MDT | Severe Thunderstorm Warning | PUB | Pueblo | 37 min |
| Sep 20, 10:29 PM MDT | Severe Thunderstorm Warning | BOU | Lincoln | 46 min |
| Sep 20, 10:44 PM MDT | Severe Thunderstorm Warning | BOU | Elbert | 46 min |
| Sep 20, 10:50 PM MDT | Severe Thunderstorm Warning | PUB | Kiowa | 25 min |
| Sep 20, 10:51 PM MDT | Severe Thunderstorm Warning | PUB | Pueblo | 39 min |
| Sep 20, 10:53 PM MDT | Severe Thunderstorm Warning | PUB | El Paso | 52 min |
| Sep 20, 10:56 PM MDT | Severe Thunderstorm Warning | PUB | Bent, Crowley, Kiowa, Otero | 49 min |
| Sep 20, 11:15 PM MDT | Severe Thunderstorm Warning | PUB | Pueblo | 11 min |
| Sep 20, 11:39 PM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 51 min |
| Sep 21, 12:07 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 23 min |
| Sep 21, 12:28 AM MDT | Severe Thunderstorm Warning | BOU | Elbert, Lincoln | 19 min |
| Sep 22, 5:30 PM MDT | Severe Thunderstorm Warning | PUB | El Paso | 30 min |
| Sep 25, 2:12 PM MDT | Severe Thunderstorm Warning | PUB | Huerfano, Las Animas | 20 min |
| Sep 25, 2:53 PM MDT | Severe Thunderstorm Warning | PUB | Las Animas | 37 min |
| Sep 25, 4:59 PM MDT | Severe Thunderstorm Warning | BOU | Adams | 31 min |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Pueblo County15
- Kiowa County14
- Lincoln County13
- Las Animas County11
- Elbert County11
- Otero County9
- Kit Carson County9
- Bent County8
- Prowers County8
- Logan County8
- Cheyenne County8
- El Paso County7
- Weld County6
- Adams County6
- Moffat County6
- Rio Blanco County6
- Crowley County5
- Arapahoe County5
- Phillips County4
- Fremont County4
- Huerfano County4
- Baca County4
- Mesa County4
- Garfield County4
- Archuleta County3
- La Plata County3
- San Miguel County3
- Sedgwick County2
- Morgan County2
- Montrose County2
- Ouray County2
- Delta County2
- Douglas County2
- Larimer County1
- Washington County1
- Custer County1
- Dolores County1
- Denver County1
- Yuma County1
Nearby
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.