Alert archive / Colorado / 2020
Weather alerts in Colorado, September 2020
68 weather alerts in September 2020, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.
Weather alerts by county
Each county as a circle sized by its count in September 2020. Tap one for its archive.
- Alerts
- 68
- Warnings
- 31
- Watches
- 15
- Advisories
- 10
- Busiest day
- September 7, 202015 alerts
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 |
|---|---|---|---|---|
| Sep 4, 1:08 PM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 30 hr |
| Sep 4, 1:16 PM MDT | Fire Weather Watch | GLD | Cheyenne, Kit Carson, Yuma | 23 hr |
| Sep 4, 2:40 PM MDT | Fire Weather Watch | BOU | Adams, Arapahoe, Boulder, Elbert, Larimer, Lincoln and 6 more | 13 hr |
| Sep 4, 2:40 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Clear Creek, Elbert, Gilpin and 12 more | 3 days |
| Sep 4, 3:28 PM MDT | Red Flag Warning | GJT | Eagle, Garfield, Mesa, Moffat, Pitkin, Rio Blanco and 1 more | 3 days |
| Sep 4, 5:11 PM MDT | Special Weather Statement | PUB | Costilla | 19 min |
| Sep 5, 2:30 AM MDT | Red Flag Warning | GJT | Moffat, Rio Blanco, Routt | 67 hr |
| Sep 5, 12:01 PM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 30 hr |
| Sep 5, 3:01 PM MDT | Fire Weather Watch | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 7 more | 24 hr |
| Sep 6, 3:12 AM MDT | Winter Storm Watch | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 10 more | 24 hr |
| Sep 6, 3:38 AM MDT | Freeze Watch | GJT | Garfield, Moffat, Rio Blanco, Routt | 24 hr |
| Sep 6, 4:36 AM MDT | Winter Storm Watch | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 9 more | 24 hr |
| Sep 6, 2:57 PM MDT | Red Flag Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 7 more | 29 hr |
| Sep 6, 9:38 PM MDT | Winter Storm Watch | GJT | Archuleta, Delta, Dolores, Eagle, Garfield, Gunnison and 8 more | 6 hr |
| Sep 7, 3:36 AM MDT | Winter Storm Warning | GJT | Archuleta, Delta, Dolores, Garfield, Gunnison, Hinsdale and 8 more | 3 days |
| Sep 7, 3:36 AM MDT | Winter Weather Advisory | GJT | Delta, Eagle, Garfield, Gunnison, Mesa, Moffat and 4 more | 50 hr |
| Sep 7, 3:39 AM MDT | Winter Storm Warning | BOU | Arapahoe, Boulder, Clear Creek, Douglas, Elbert, Gilpin and 6 more | 55 hr |
| Sep 7, 3:39 AM MDT | Winter Weather Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 7 more | 55 hr |
| Sep 7, 3:41 AM MDT | Freeze Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 10 more | 55 hr |
| Sep 7, 4:01 AM MDT | Freeze Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 24 hr |
| Sep 7, 4:01 AM MDT | Freeze Warning | GJT | Routt | 30 hr |
| Sep 7, 4:05 AM MDT | Freeze Warning | PUB | Alamosa, Conejos, Costilla, Crowley, Custer, El Paso and 9 more | 56 hr |
| Sep 7, 4:05 AM MDT | High Wind Watch | PUB | Crowley, El Paso, Otero, Pueblo | 6 hr |
| Sep 7, 4:08 AM MDT | Winter Storm Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 9 more | 3 days |
| Sep 7, 10:10 AM MDT | High Wind Warning | PUB | Crowley, El Paso, Otero, Pueblo | 19 hr |
| Sep 7, 1:59 PM MDT | Winter Weather Advisory | PUB | Custer, El Paso, Fremont, Las Animas, Pueblo, Teller | 46 hr |
| Sep 7, 2:48 PM MDT | Freeze Warning | GLD | Cheyenne, Kit Carson, Yuma | 44 hr |
| Sep 7, 4:12 PM MDT | Wind Advisory | GJT | Routt | 29 hr |
| Sep 8, 3:49 AM MDT | Freeze Warning | GJT | Eagle, Garfield, Mesa, Moffat, Pitkin, Rio Blanco and 1 more | 30 hr |
| Sep 8, 8:21 AM MDT | Mesoscale Discussion | SPC | Boulder, Grand, Jackson, Larimer, Routt, Summit | 4 hr |
| Sep 8, 11:49 AM MDT | Special Weather Statement | GJT | La Plata | 41 min |
| Sep 8, 12:50 PM MDT | Special Weather Statement | ABQ | Archuleta | 25 min |
| Sep 8, 12:53 PM MDT | Special Weather Statement | GJT | Ouray | 52 min |
| Sep 8, 2:48 PM MDT | Mesoscale Discussion | SPC | Alamosa, Chaffee, Conejos, Costilla, Custer, Douglas and 10 more | 4 hr |
| Sep 9, 10:15 AM MDT | Freeze Warning | GJT | Garfield, Moffat, Rio Blanco, Routt | 23 hr |
| Sep 9, 12:06 PM MDT | Winter Storm Warning | PUB | Mineral, Rio Grande, Saguache | 24 hr |
| Sep 9, 12:06 PM MDT | Winter Weather Advisory | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, Fremont and 5 more | 24 hr |
| Sep 10, 3:07 AM MDT | Dense Fog Advisory | PUB | El Paso, Fremont, Teller | 7 hr |
| Sep 11, 3:21 AM MDT | Dense Fog Advisory | PUB | Alamosa, Rio Grande, Saguache | 6 hr |
| Sep 19, 2:04 AM MDT | Red Flag Warning | GLD | Cheyenne, Kit Carson, Yuma | 17 hr |
| Sep 19, 3:55 AM MDT | Red Flag Warning | PUB | Bent, Kiowa, Prowers | 15 hr |
| Sep 22, 2:52 PM MDT | Special Weather Statement | PUB | El Paso | 23 min |
| Sep 22, 3:33 PM MDT | Special Weather Statement | PUB | El Paso | 27 min |
| Sep 22, 4:12 PM MDT | Special Weather Statement | PUB | El Paso | 48 min |
| Sep 22, 4:46 PM MDT | Special Weather Statement | PUB | Pueblo | 44 min |
| Sep 22, 4:48 PM MDT | Special Weather Statement | PUB | Pueblo | 27 min |
| Sep 22, 5:58 PM MDT | Special Weather Statement | PUB | Pueblo | 32 min |
| Sep 23, 10:29 AM MDT | Red Flag Warning | GJT | Moffat | 34 hr |
| Sep 23, 1:18 PM MDT | Fire Weather Watch | GJT | Moffat, Rio Blanco, Routt | 14 hr |
| Sep 23, 2:34 PM MDT | Fire Weather Watch | BOU | Boulder, Grand, Jackson, Larimer, Summit | 14 hr |
| Sep 24, 3:00 AM MDT | Red Flag Warning | GJT | Eagle, Garfield, Mesa, Moffat, Montrose, Pitkin and 3 more | 41 hr |
| Sep 24, 4:06 AM MDT | Red Flag Warning | BOU | Boulder, Clear Creek, Douglas, Gilpin, Grand, Jackson and 4 more | 40 hr |
| Sep 24, 2:52 PM MDT | Red Flag Warning | PUB | Chaffee, El Paso, Fremont, Lake, Teller | 29 hr |
| Sep 25, 4:14 AM MDT | Fire Weather Watch | BOU | Larimer, Logan, Phillips, Sedgwick, Weld | 9 hr |
| Sep 25, 12:45 PM MDT | Red Flag Warning | BOU | Adams, Arapahoe, Boulder, Broomfield, Clear Creek, Denver and 13 more | 31 hr |
| Sep 25, 2:32 PM MDT | Red Flag Warning | GJT | Delta, Eagle, Garfield, Gunnison, Hinsdale, Mesa and 3 more | 29 hr |
| Sep 25, 4:46 PM MDT | Red Flag Warning | PUB | Alamosa, Chaffee, Conejos, Costilla, Custer, El Paso and 8 more | 27 hr |
| Sep 26, 2:04 AM MDT | Fire Weather Watch | GJT | Dolores, La Plata, Montezuma, San Miguel | 24 hr |
| Sep 26, 2:14 AM MDT | Red Flag Warning | GLD | Yuma | 16 hr |
| Sep 26, 3:19 PM MDT | Freeze Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 11 hr |
| Sep 27, 2:33 AM MDT | Red Flag Warning | GJT | Dolores, La Plata, Montezuma, San Miguel | 17 hr |
| Sep 27, 2:34 AM MDT | Freeze Warning | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 31 hr |
| Sep 28, 2:48 AM MDT | Freeze Watch | GJT | Eagle, Garfield, Moffat, Pitkin, Rio Blanco, Routt | 12 hr |
| Sep 28, 2:22 PM MDT | Frost Advisory | GLD | Cheyenne, Kit Carson | 18 hr |
| Sep 28, 2:48 PM MDT | Freeze Warning | GJT | Archuleta, Dolores, Eagle, Garfield, La Plata, Moffat and 5 more | 18 hr |
| Sep 28, 2:54 PM MDT | Frost Advisory | PUB | Baca, Bent, Crowley, Kiowa, Prowers | 17 hr |
| Sep 28, 7:36 PM MDT | Frost Advisory | BOU | Elbert, Lincoln | 12 hr |
| Sep 29, 2:27 AM MDT | Red Flag Warning | GLD | Kit Carson, Yuma | 16 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 | 2 |
| Special Weather Statement | 10 |
| Winter | |
| Winter Storm Warning | 4 |
| Winter Storm Watch | 3 |
| Winter Weather Advisory | 4 |
| Cold | |
| Freeze Warning | 8 |
| Freeze Watch | 4 |
| Frost Advisory | 3 |
| Wind and dust | |
| High Wind Warning | 1 |
| High Wind Watch | 1 |
| Wind Advisory | 1 |
| Fire | |
| Red Flag Warning | 18 |
| Fire Weather Watch | 7 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Moffat County16
- Routt County16
- Rio Blanco County15
- Garfield County14
- Pueblo County13
- El Paso County13
- Larimer County11
- Eagle County11
- Pitkin County11
- Fremont County11
- Boulder County10
- Rio Grande County10
- Saguache County10
- Costilla County9
- Alamosa County9
- Custer County9
- Las Animas County9
- Elbert County8
- Chaffee County8
- Conejos County8
- Huerfano County8
- Lake County8
- Teller County8
- Kit Carson County7
- Yuma County7
- Arapahoe County7
- Weld County7
- Grand County7
- Jackson County7
- Douglas County7
- Cheyenne County6
- Adams County6
- Lincoln County6
- Park County6
- Summit County6
- Jefferson County6
- La Plata County6
- San Miguel County6
- Logan County5
- Phillips County5
24 more counties
- Sedgwick County5
- Clear Creek County5
- Gilpin County5
- Mesa County5
- Mineral County5
- Dolores County5
- Montezuma County5
- Morgan County4
- Washington County4
- Broomfield County4
- Denver County4
- Archuleta County4
- Delta County4
- Gunnison County4
- Montrose County4
- Crowley County4
- Hinsdale County3
- Ouray County3
- Kiowa County3
- Otero County3
- San Juan County2
- Bent County2
- Prowers County2
- Baca County1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20192021
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.