Alert archive / Ohio / Dense Fog Advisories

Dense Fog Advisories in Ohio, 2026

36 dense fog advisories in 2026. 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 in 2026. Tap one for its archive.

Dense Fog Advisories
36
Busiest month
March11 dense fog advisories
Busiest day
May 25, 20266 dense fog advisories

Over time

By month

The alerts

Every alert, in the order issued. Times are local, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

IssuedProductOfficeCountiesLasted
Jan 8, 1:35 AM ESTDense Fog AdvisoryILNChampaign, Clark, Delaware, Fairfield, Fayette, Franklin and 10 more7 hr
Feb 15, 6:35 PM ESTDense Fog AdvisoryILNAdams, Auglaize, Brown, Butler, Champaign, Clark and 26 more17 hr
Feb 15, 7:42 PM ESTDense Fog AdvisoryRLXAthens, Gallia, Jackson, Lawrence, Meigs, Morgan and 3 more14 hr
Feb 15, 8:35 PM ESTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more15 hr
Feb 15, 9:13 PM ESTDense Fog AdvisoryCLEAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 18 more15 hr
Feb 16, 2:51 AM ESTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more9 hr
Feb 16, 9:06 PM ESTDense Fog AdvisoryILNAdams, Auglaize, Brown, Butler, Champaign, Clark and 26 more13 hr
Feb 18, 8:01 PM ESTDense Fog AdvisoryCLEAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more15 hr
Feb 18, 8:13 PM ESTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 3 more13 hr
Mar 3, 10:02 PM ESTDense Fog AdvisoryCLEAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more13 hr
Mar 4, 12:49 AM ESTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 3 more10 hr
Mar 4, 12:50 AM ESTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more9 hr
Mar 4, 11:07 PM ESTDense Fog AdvisoryILNAuglaize, Champaign, Clark, Darke, Delaware, Franklin and 10 more6 hr
Mar 4, 11:18 PM ESTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more11 hr
Mar 5, 1:07 AM ESTDense Fog AdvisoryCLEAshland, Crawford, Erie, Hancock, Holmes, Huron and 18 more9 hr
Mar 5, 3:38 AM ESTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 3 more6 hr
Mar 5, 9:06 PM ESTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more14 hr
Mar 6, 1:48 AM ESTDense Fog AdvisoryILNAuglaize, Champaign, Clark, Darke, Delaware, Franklin and 11 more8 hr
Mar 6, 3:45 AM ESTDense Fog AdvisoryCLEAshland, Ashtabula, Crawford, Hancock, Holmes, Knox and 12 more6 hr
Mar 6, 4:29 AM ESTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more6 hr
Apr 16, 10:31 PM EDTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more9 hr
Apr 17, 4:51 AM EDTDense Fog AdvisoryCLEAshtabula, Cuyahoga, Geauga, Lake6 hr
May 24, 11:34 PM EDTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more9 hr
May 25, 1:09 AM EDTDense Fog AdvisoryILNAdams, Brown, Clark, Clermont, Clinton, Delaware and 15 more5 hr
May 25, 1:30 AM EDTDense Fog AdvisoryCLEAshland, Ashtabula, Crawford, Cuyahoga, Erie, Geauga and 22 more8 hr
May 25, 2:11 AM EDTDense Fog AdvisoryPBZBelmont, Carroll, Columbiana, Coshocton, Guernsey, Harrison and 5 more7 hr
May 25, 2:15 AM EDTDense Fog AdvisoryRLXAthens, Jackson, Morgan, Perry, Vinton, Washington7 hr
May 25, 6:30 AM EDTDense Fog AdvisoryILNAuglaize, Hardin, Mercer2 hr
May 28, 2:56 AM EDTDense Fog AdvisoryILNAdams, Brown, Butler, Clermont, Clinton, Fayette and 9 more6 hr
Jun 29, 6:00 AM EDTDense Fog AdvisoryILNAdams, Brown, Highland, Hocking, Pike, Ross and 1 more3 hr
Aug 6, 5:57 AM EDTDense Fog AdvisoryILNAdams, Brown, Clermont, Clinton, Fairfield, Fayette and 6 more3 hr
Aug 7, 5:06 AM EDTDense Fog AdvisoryIWXAllen, Defiance, Fulton, Henry, Paulding, Putnam and 2 more4 hr
Aug 15, 1:55 AM EDTDense Fog AdvisoryPBZBelmont, Carroll, Coshocton, Guernsey, Harrison, Jefferson and 4 more8 hr
Aug 15, 5:54 AM EDTDense Fog AdvisoryCLEHolmes, Knox, Marion, Morrow3 hr
Aug 21, 1:50 AM EDTDense Fog AdvisoryPBZBelmont, Guernsey, Harrison, Jefferson, Monroe7 hr
Sep 13, 3:13 AM EDTDense Fog AdvisoryILNAdams, Auglaize, Brown, Butler, Champaign, Clark and 26 more6 hr

By county

Every county with at least one alert. A county page lists each alert that covered it.

48 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. May 25, 20266dense fog advisories
  2. February 16, 20264dense fog advisories
  3. March 5, 20264dense fog advisories
  4. March 6, 20264dense fog advisories
  5. March 4, 20263dense fog advisories
  6. February 19, 20262dense fog advisories
  7. April 17, 20262dense fog advisories
  8. August 15, 20262dense fog advisories
  9. January 8, 20261dense fog advisories
  10. February 15, 20261dense fog advisories
  11. February 17, 20261dense fog advisories
  12. May 28, 20261dense fog advisories

Nearby

Alerts in force nowTornadoes on recordThe radar archive2025

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.