Dense Fog Advisories in Colorado
648 dense fog advisories since 1986. 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 since 1986. Tap one for its archive.
- Dense Fog Advisories
- 648
- Busiest year
- 201958 dense fog advisories
- Average year
- 29over 22 years on file
Over time
By year
Before late 2005 the archive holds only tornado, severe thunderstorm, flash flood and marine warnings, and from 1997 SPC's watches, so the jump that year is the archive widening, not the weather.
By month of the year
By county
Every county with at least one alert. A county page lists each alert that covered it.
- Kit Carson County192
- Yuma County182
- Cheyenne County167
- Garfield County130
- Mesa County116
- Weld County88
- Larimer County66
- Rio Blanco County66
- Moffat County65
- Boulder County61
- Douglas County60
- Jefferson County60
- Broomfield County59
- Arapahoe County58
- Routt County58
- Montrose County57
- Logan County56
- Morgan County55
- Phillips County55
- Adams County54
- Sedgwick County52
- Denver County51
- Gunnison County51
- El Paso County50
- Washington County49
- Elbert County44
- Lincoln County37
- San Miguel County37
- Delta County35
- Dolores County34
- La Plata County28
- Pueblo County28
- Prowers County25
- Eagle County24
- Pitkin County24
- Kiowa County24
- Bent County23
- Montezuma County22
- Otero County20
- Crowley County18
20 more counties
- Archuleta County16
- Clear Creek County15
- Gilpin County15
- Park County15
- Fremont County13
- Teller County13
- Baca County13
- Custer County11
- Las Animas County8
- Alamosa County7
- Rio Grande County7
- Saguache County7
- Costilla County6
- Conejos County6
- Huerfano County5
- Ouray County3
- Hinsdale County2
- Grand County1
- Jackson County1
- Summit County1
The latest dense fog advisories
The most recent on file, newest first.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 16, 11:01 PM MDT | Dense Fog Advisory | GLD | Yuma | 10 hr |
| Aug 5, 10:51 PM MDT | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 11 hr |
| Jun 6, 2:56 AM MDT | Dense Fog Advisory | GLD | Kit Carson, Yuma | 6 hr |
| Apr 27, 7:25 AM MDT | Dense Fog Advisory | BOU | Adams, Arapahoe, Boulder, Broomfield, Denver, Douglas and 1 more | 3 hr |
| Mar 2, 10:32 PM MST | Dense Fog Advisory | GLD | Cheyenne, Kit Carson, Yuma | 11 hr |
| Jan 24, 7:22 AM MST | Dense Fog Advisory | GJT | Dolores, Garfield, Mesa, Montrose, San Miguel | 5 hr |
| Jan 6, 3:10 AM MST | Dense Fog Advisory | GJT | Moffat, Rio Blanco, Routt | 6 hr |
| Jan 3, 7:21 PM MST | Dense Fog Advisory | GJT | Garfield, Mesa | 16 hr |
| Jan 3, 2:02 AM MST | Dense Fog Advisory | GJT | Archuleta, Delta, Garfield, Gunnison, La Plata, Mesa and 1 more | 9 hr |
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.