Alert archive / Dense Fog Advisories

Dense Fog Advisories in the United States, 2024

1,963 dense fog advisories in 2024. 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.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Dense Fog Advisories
1,963
Busiest month
December483 dense fog advisories
Busiest day
January 24, 202456 dense fog advisories

Over time

By month

By state

Every state and territory, with the alerts that covered any part of it. Each state’s page lists every one of them.

10 more states

The busiest days

Days with the most alerts issued, by UTC date.

  1. January 24, 202456dense fog advisories
  2. January 23, 202454dense fog advisories
  3. January 25, 202451dense fog advisories
  4. January 26, 202439dense fog advisories
  5. December 28, 202438dense fog advisories
  6. December 29, 202437dense fog advisories
  7. December 26, 202436dense fog advisories
  8. December 30, 202434dense fog advisories
  9. December 15, 202431dense fog advisories
  10. March 2, 202430dense fog advisories
  11. March 3, 202429dense fog advisories
  12. December 25, 202428dense fog advisories
  13. December 17, 202427dense fog advisories
  14. January 22, 202426dense fog advisories
  15. December 10, 202424dense fog advisories

Nearby

Alerts in force nowThe tornado archiveThe radar archive20232025

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.