Alert archive / Dense Fog Advisories / 2018
Dense Fog Advisories in the United States, August 2018
79 dense fog advisories in August 2018. Each alert counts once, however many counties it covered. The archive of dense fog advisories reaches back to 2005.
Dense Fog Advisories by state
Each state shaded by its count. Tap a state for its own archive.
- Dense Fog Advisories
- 79
- Busiest day
- August 25, 20189 dense fog advisories
Over time
By day
Days in UTC, the clock the archive keeps.
By state
Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.
- Texas171
- California92
- Florida92
- Illinois92
- Missouri78
- Kansas77
- Georgia76
- Iowa76
- Alabama69
- Nebraska65
- Wisconsin64
- North Dakota63
- Minnesota62
- Arkansas62
- Mississippi60
- Indiana57
- Alaska51
- Louisiana50
- North Carolina49
- South Carolina46
- Tennessee46
- Oregon44
- Maine44
- South Dakota43
- Maryland43
- Massachusetts40
- Virginia39
- Pennsylvania39
- Colorado36
- Montana35
- Oklahoma35
- Michigan34
- Ohio34
- New York31
- Kentucky30
- Washington29
- Connecticut25
- Rhode Island23
- Wyoming22
- West Virginia21
Nearby
Alerts in force nowThe tornado archiveThe radar archive20172019
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.