Harrisburg, Pa. – Thick fog blanketed much of central and western Pennsylvania early Tuesday, making morning commutes challenging across major routes like I-80, I-99, and the Pennsylvania Turnpike. Drivers in cities including Harrisburg, Pittsburgh, Lancaster, and State College awoke to near-zero visibility, with conditions expected to linger until at least 9 a.m.
According to the National Weather Service offices in State College and Pittsburgh, dense fog developed overnight, locally reducing visibility to a quarter mile or less. The heaviest fog stretches from Potter County and the Northern Tier, through Centre, Blair, Cambria, and Juniata counties, down to Lancaster and York. Portions of eastern Ohio and northern West Virginia, including Belmont and Greene counties and the Morgantown area, are also impacted. Roadways, bridges, and rural intersections remain particularly hazardous.
Travelers are urged to allow extra time this morning, reduce speed, and increase following distance. Use low-beam headlights and be prepared for sudden drops in visibility, especially in valleys and along rivers. If fog becomes too thick, safely pull off the road until conditions improve. School buses, delivery drivers, and early shift workers should use additional caution.
This widespread fog is typical during humid July mornings in Pennsylvania, often following rain and clear overnight skies. Conditions should improve by 9 a.m., but isolated pockets of fog may persist in low-lying areas.
Warnings remain in effect through sunrise, with additional advisories possible if conditions persist.
