Alert archive / Colorado / Dense Fog Advisories
Dense Fog Advisories in Colorado, 2021
30 dense fog advisories in 2021. 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 dense fog advisories reaches back to 2005.
Dense Fog Advisories by county
Each county as a circle sized by its count in 2021. Tap one for its archive.
- Dense Fog Advisories
- 30
- Busiest month
- July6 dense fog advisories
- Busiest day
- October 24, 20213 dense fog advisories
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 | Counties | Lasted |
|---|---|---|---|---|
| Jan 1, 10:26 PM MST | Dense Fog Advisory | GJT | Garfield, Moffat, Rio Blanco, Routt | 15 hr |
| Feb 7, 9:08 PM MST | Dense Fog Advisory | PUB | Baca, Bent, Crowley, El Paso, Huerfano, Kiowa and 4 more | 11 hr |
| Feb 11, 10:36 PM MST | Dense Fog Advisory | PUB | Huerfano, Las Animas, Pueblo | 5 hr |
| Feb 18, 9:42 PM MST | Dense Fog Advisory | BOU | Elbert, Lincoln | 4 hr |
| Feb 19, 3:49 AM MST | Dense Fog Advisory | PUB | Custer, El Paso, Fremont, Pueblo, Teller | 5 hr |
| Mar 15, 2:41 PM MDT | Dense Fog Advisory | BOU | Adams, Arapahoe, Broomfield, Denver, Douglas, Elbert and 5 more | 25 min |
| Mar 15, 3:07 PM MDT | Dense Fog Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 7 more | 19 hr |
| Mar 27, 3:57 AM MDT | Dense Fog Advisory | BOU | Larimer, Morgan, Weld | 4 hr |
| Apr 15, 10:52 AM MDT | Dense Fog Advisory | PUB | El Paso | 7 hr |
| Apr 24, 6:03 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson | 3 hr |
| May 24, 5:07 AM MDT | Dense Fog Advisory | GLD | Kit Carson, Yuma | 4 hr |
| May 24, 6:23 AM MDT | Dense Fog Advisory | BOU | Elbert, Lincoln, Logan, Morgan, Phillips, Sedgwick and 2 more | 3 hr |
| May 24, 9:57 PM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 7 hr |
| May 29, 6:20 AM MDT | Dense Fog Advisory | BOU | Elbert, Lincoln, Washington, Weld | 100 min |
| Jun 10, 4:00 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 5 hr |
| Jun 10, 4:44 AM MDT | Dense Fog Advisory | PUB | Bent, Kiowa, Otero, Prowers | 4 hr |
| Jul 7, 5:49 AM MDT | Dense Fog Advisory | GLD | Yuma | 3 hr |
| Jul 15, 10:20 PM MDT | Dense Fog Advisory | GLD | Kit Carson, Yuma | 11 hr |
| Jul 19, 2:11 AM MDT | Dense Fog Advisory | GLD | Cheyenne | 6 hr |
| Jul 19, 2:43 AM MDT | Dense Fog Advisory | PUB | Baca, Bent, Crowley, Kiowa, Otero, Prowers | 6 hr |
| Jul 25, 5:42 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson | 3 hr |
| Jul 26, 5:10 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 86 min |
| Sep 15, 3:36 AM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 5 hr |
| Sep 15, 6:37 AM MDT | Dense Fog Advisory | BOU | Elbert, Lincoln | 2 hr |
| Sep 28, 4:26 AM MDT | Dense Fog Advisory | GJT | La Plata | 3 hr |
| Oct 23, 8:41 PM MDT | Dense Fog Advisory | BOU | Washington | 8 hr |
| Oct 23, 8:45 PM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 8 hr |
| Oct 24, 6:22 AM MDT | Dense Fog Advisory | BOU | Logan, Morgan, Phillips, Sedgwick, Washington | 3 hr |
| Nov 3, 2:54 AM MDT | Dense Fog Advisory | BOU | Logan, Morgan, Phillips, Sedgwick, Washington, Weld | 8 hr |
| Dec 24, 10:51 PM MST | Dense Fog Advisory | GJT | Delta, Garfield, Gunnison, Mesa, Montrose | 14 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kit Carson County9
- Cheyenne County8
- Yuma County8
- Washington County7
- Elbert County6
- Lincoln County6
- Morgan County6
- Weld County6
- Logan County5
- Bent County3
- El Paso County3
- Kiowa County3
- Otero County3
- Prowers County3
- Pueblo County3
- Phillips County3
- Sedgwick County3
- Garfield County2
- Baca County2
- Crowley County2
- Huerfano County2
- Las Animas County2
- Adams County2
- Arapahoe County2
- Broomfield County2
- Denver County2
- Douglas County2
- Moffat County1
- Rio Blanco County1
- Routt County1
- Custer County1
- Fremont County1
- Teller County1
- Boulder County1
- Jefferson County1
- Larimer County1
- La Plata County1
- Delta County1
- Gunnison County1
- Mesa County1
1 more counties
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordThe radar archive20202022
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.