PHILADELPHIA, PA – A blanket of dense fog descended over Pennsylvania, New Jersey, Delaware, and Maryland early Wednesday morning, prompting the National Weather Service in Mount Holly to issue a Dense Fog Advisory through 10 a.m. The murky conditions reduced visibility to a quarter mile or less in many areas, creating a treacherous morning commute across major highways and rural roads.
Motorists from Wilmington to Trenton and Philadelphia faced reduced sightlines and slick surfaces as fog combined with patchy ice. The National Weather Service warned that freezing fog could leave a thin layer of ice on untreated bridges and overpasses, particularly in inland and elevated areas.
Commuters across eastern Pennsylvania, central New Jersey, and northern Delaware were urged to use low-beam headlights, reduce speed, and allow extra distance between vehicles. Transportation officials advised travelers to remain alert, as visibility could change rapidly from one stretch of roadway to the next.
Air travel was also affected, with reports of flight delays at Philadelphia International Airport due to low ceiling conditions and limited runway visibility. Some regional flights were temporarily grounded as crews awaited improved weather later in the morning.
Fog grips the region during morning rush
The fog was expected to lift gradually after mid-morning as temperatures rise above freezing. However, forecasters cautioned that another round of patchy fog could develop overnight if skies clear and winds remain calm.
- Three key takeaways from the advisory:*
- Dense fog reduced visibility to less than a quarter mile across the tri-state area
- Freezing fog created slick spots on bridges and untreated roads
- Conditions expected to improve by mid-morning but may return overnight
Drivers are reminded that even short commutes can become dangerous in fog. The National Weather Service advises drivers to use headlights, not high beams, and to avoid sudden lane changes or stops.
For more weather-related updates, visit National Weather Service and check for local travel alerts throughout the day.
Stay alert as fog lifts across the tri-state region
