Gone are the 60-degree temperatures from Thursday, now replaced by high temperatures near the 32-degree mark.
The return of colder air was accompanied by a couple of inches of snow early Friday night with snowfall accumulations generally between 2 and 4 inches across the area.
As temperatures fall, a layer of ice may form underneath the snow, adding to driving and walking conditions.
The weekend will be cold around Pittsburgh with high temperatures within a few degrees of freezing.
After a break from precipitation on Saturday, another round of snow and a wintry mix is in the offing for Sunday.
The coldest air of the season so far may follow during the middle of next week.
Hurricane Matthew will take a northward turn this weekend, which will bring the storm along the Atlantic coast of the United States next week.
Hurricane Matthew will threaten lives and property across the central and northern Caribbean with flooding rain, damaging winds and an inundating storm surge early next week.
The rising sea temperatures are creating a more hospitable environment for disease-causing bacteria, a new study finds.
It will feel like an extended winter for those living from the northern Plains to the eastern U.S., as cold and snowy conditions last longer than normal.
Chaba remains on track to become a powerful typhoon and could threaten lives and property across the Ryukyu Islands and mainland Japan next week.
A large chunk of the United Kingdom will catch a break from the recent unsettled weather during the first week of October.
Gulf States/ Carolinas (1837)
H.M.S. Racer dismasted in Gulf of Mexico. Famous Racer's Hurricane swept from Texas through Gulf States to Cape Hatteras.
Louisiana Bayou County (1893)
Hurricane generated storm wave - killed 2,000. 12-foot tides; central pressure 970 mb; 100+ mph winds.
Two-day Deluge of Rain Table Rock, SC 7.01 inches Anderson, SC 5.44 inches Highlands, NC 9.91 inches Atlanta, GA 5.85 inches Athens, GA 9.03 inches