Much-cooler air has settled over the Northeast behind a strong cold front that moved through early on Friday.
At times this weekend, temperatures will be similar to what is expected during the early part of October.
The air mass ahead of this front was quite steamy as high temperatures midweek soared into the 90s in many locations.
As the cold front bumped into the hot and humid air, powerful thunderstorms developed on Wednesday and Thursday. Some of these storms contained damaging winds, hail and flooding downpours.
As a thunderstorm passed over Baltimore-Washington International Airport on Thursday afternoon, lightning struck the control tower, prompting air traffic to be halted at the airport for a few hours.
In some locations behind the front, temperatures fell nearly 40 degrees between Wednesday afternoon and late on Friday evening.
In Binghamton, N.Y., temperatures on Wednesday afternoon climbed into the upper 80s. At 9 p.m. local time on Friday, the temperature was 49 degrees.
A similar story played out in Albany, N.Y., Scranton, Pa. and Allentown, Pa.
After reaching the middle 90s on Wednesday afternoon in Baltimore, Philadelphia, New York City and Hartford, temperatures dipped into the low 60s late on Friday evening.
High temperatures across the Northeast on Saturday will average six to 10 degrees below normal for most locations, and generally topping out in the 60s during the afternoon.
In the Adirondacks and from northern Vermont to northern Maine, highs will only be in the 50s on Saturday. Meanwhile, along the I-95 corridor from Baltimore to Boston, temperatures will reach the lower 70s.
In college football, the nationally ranked Stanford Cardinals will travel to West Point, N.Y., to take on Army on Saturday afternoon. It will feel more like typical fall football weather with a noon EDT kickoff temperature of 63 degrees.
The Maryland Terrapins will take on the Connecticut Huskies in East Hartford, Conn., on Saturday evening. It will be in the low 60s at kickoff, but in the middle 50s by the end of the game.
Saturday night will be chilly and definitely will require long sleeves, jackets and sweaters.
Low temperatures on Saturday night will be more representative of October, generally falling into the 30s and 40s. A few locations in the Adirondacks will likely fall to freezing or slightly below.
Fantastic weather is expected on Sunday for outdoor activities, with some sunshine and temperatures in the middle 60s to middle 70s across the region. While it will be warmer compared to Saturday, these temperatures are cooler than normal for mid-September.
Cities in the Northeast region that will host NFL contests on Sunday include: Philadelphia, Buffalo, Baltimore and East Rutherford, N.J. Temperatures at kickoff at all four locations will be in the 70s with mostly sunny skies.