Alert archive

Marine Dense Fog Advisories in the United States

6,990 marine dense fog advisories since 1986. 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
6,990
Busiest year
2025511 marine dense fog advisories
Average year
368over 19 years on file
Busiest day
February 3, 202526 marine dense fog advisories

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 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. February 3, 202526marine dense fog advisories
  2. January 21, 201720marine dense fog advisories
  3. December 30, 202120marine dense fog advisories
  4. December 31, 202217marine dense fog advisories
  5. February 18, 201116marine dense fog advisories
  6. February 9, 202116marine dense fog advisories
  7. January 2, 202316marine dense fog advisories
  8. March 5, 202615marine dense fog advisories
  9. January 22, 201214marine dense fog advisories
  10. January 12, 201314marine dense fog advisories
  11. January 12, 201514marine dense fog advisories
  12. February 28, 202114marine dense fog advisories
  13. December 7, 202214marine dense fog advisories
  14. January 24, 202414marine dense fog advisories
  15. January 26, 202414marine dense fog advisories

Nearby

Alerts in force nowThe tornado archiveThe radar archive

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.