The recent drop to seasonable to below-average temperatures across the state has pushed the most substantial and widespread transition to fall forest colors seen so far this season.
Areas only showing early color last week appear primed for peak, according to the Pennsylvania Department of Conservation and Natural Resources.
The peak season, the agency said, could be only a week or so away in significant parts of the state.
Notable changes have occurred throughout the Appalachians and the Allegheny Plateau. Northern hardwood species like maple, birch and cherries are displaying fantastic color this week in widespread areas.
Cool, dry conditions in the 10-day forecast foretell improving foliage color for majority of the state this week.
The best fall foliage viewing this week is in northcentral and northeastern Pennsylvania.
Northwest Region report
Northwestern Region color is strongly progressing in the northwest.
Areas with more birch, cherry, and maple are displaying the most color, but regions dominated by oak are still fairly green.
Parts of Forest County along routes 66 and 666, seem to be further ahead in fall color than the rest of the region.
Sassafras, maple, hickory, and birch are all displaying a full palette of colors.