Alert archive / Marine Dense Fog Advisories

Marine Dense Fog Advisories in the United States, 2021

479 marine dense fog advisories in 2021. Each alert counts once, however many counties it covered. The archive of marine dense fog advisories reaches back to 2005.

Marine Dense Fog Advisories by state

Each state shaded by its count. Tap a state for its own archive.

AKMEVTNHWAIDMTNDMNILWIMINYRIMAORNVWYSDIAINOHPANJCTCAUTCONEMOKYWVVAMDDEAZNMKSARTNNCSCDCOKLAMSALGAHITXFLPR
Marine Dense Fog Advisories
479
Busiest month
December113 marine dense fog advisories
Busiest day
December 30, 202120 marine 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.

The busiest days

Days with the most alerts issued, by UTC date.

  1. December 30, 202120marine dense fog advisories
  2. February 9, 202116marine dense fog advisories
  3. February 28, 202114marine dense fog advisories
  4. January 26, 202112marine dense fog advisories
  5. December 18, 202110marine dense fog advisories
  6. March 26, 202110marine dense fog advisories
  7. March 27, 202110marine dense fog advisories
  8. December 3, 20219marine dense fog advisories
  9. February 10, 20219marine dense fog advisories
  10. February 25, 20219marine dense fog advisories
  11. March 25, 20219marine dense fog advisories
  12. October 3, 20218marine dense fog advisories
  13. March 15, 20218marine dense fog advisories
  14. December 4, 20217marine dense fog advisories
  15. December 31, 20217marine dense fog advisories

Nearby

Alerts in force nowThe tornado archiveThe 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.