Alert archive / Pennsylvania / Dense Fog Advisories

Dense Fog Advisories in Pennsylvania, 2021

22 dense fog advisories in 2021. 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 2021. Tap one for its archive.

Dense Fog Advisories
22
Busiest month
December6 dense fog advisories
Busiest day
August 20, 20213 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 15, 5:23 PM ESTDense Fog AdvisoryBGMPike, Wayne8 hr
Mar 1, 2:33 AM ESTDense Fog AdvisoryCTPAdams, Bedford, Blair, Centre, Clinton, Cumberland and 14 more5 hr
Mar 18, 6:39 AM EDTDense Fog AdvisoryBGMLackawanna, Luzerne, Pike, Wayne3 hr
Mar 24, 7:09 PM EDTDense Fog AdvisoryPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more14 hr
Mar 25, 1:44 AM EDTDense Fog AdvisoryCTPAdams, Cumberland, Dauphin, Franklin, Lancaster, Lebanon and 3 more7 hr
Jun 4, 3:55 AM EDTDense Fog AdvisoryCLECrawford, Erie5 hr
Jul 4, 1:25 AM EDTDense Fog AdvisoryPHIBerks, Bucks, Chester, Lehigh, Montgomery, Northampton7 hr
Jul 13, 3:44 PM EDTDense Fog AdvisoryPHIBucks, Monroe, Northampton14 hr
Aug 20, 1:17 AM EDTDense Fog AdvisoryCLECrawford, Erie8 hr
Aug 20, 1:50 AM EDTDense Fog AdvisoryCTPWarren7 hr
Aug 20, 1:57 AM EDTDense Fog AdvisoryPBZBeaver, Butler, Clarion, Forest, Jefferson, Lawrence and 2 more7 hr
Oct 3, 3:33 AM EDTDense Fog AdvisoryPHIBucks, Chester, Delaware, Montgomery6 hr
Oct 5, 5:00 AM EDTDense Fog AdvisoryCLECrawford, Erie5 hr
Oct 8, 7:19 AM EDTDense Fog AdvisoryCTPBedford, Blair, Centre, Fulton, Huntingdon, Juniata and 1 more101 min
Oct 14, 3:10 AM EDTDense Fog AdvisoryCTPAdams, Bedford, Blair, Cambria, Cameron, Centre and 27 more6 hr
Oct 14, 3:16 AM EDTDense Fog AdvisoryPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more3 hr
Dec 29, 4:35 AM ESTDense Fog AdvisoryCLECrawford, Erie5 hr
Dec 29, 4:51 AM ESTDense Fog AdvisoryPBZButler, Clarion, Forest, Jefferson, Lawrence, Mercer and 1 more3 hr
Dec 29, 4:53 AM ESTDense Fog AdvisoryCTPCameron, Clearfield, Elk, McKean, Warren5 hr
Dec 30, 9:33 PM ESTDense Fog AdvisoryPHIBerks, Bucks, Carbon, Chester, Delaware, Lehigh and 4 more11 hr
Dec 30, 9:35 PM ESTDense Fog AdvisoryBGMBradford, Lackawanna, Luzerne, Pike, Susquehanna, Wayne and 1 more10 hr
Dec 30, 10:09 PM ESTDense Fog AdvisoryCTPAdams, Bedford, Blair, Cameron, Centre, Clinton and 22 more12 hr

By county

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

20 more counties

The busiest days

Days with the most alerts issued, by UTC date.

  1. August 20, 20213dense fog advisories
  2. December 29, 20213dense fog advisories
  3. December 31, 20213dense fog advisories
  4. October 14, 20212dense fog advisories
  5. January 15, 20211dense fog advisories
  6. March 1, 20211dense fog advisories
  7. March 18, 20211dense fog advisories
  8. March 24, 20211dense fog advisories
  9. March 25, 20211dense fog advisories
  10. June 4, 20211dense fog advisories
  11. July 4, 20211dense fog advisories
  12. July 13, 20211dense fog advisories

Nearby

Alerts in force nowTornadoes on recordThe 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.