Cooler weather followed a series of headaches created by rainy and windy conditions around the region today.
After hitting 64 degrees during showers at 10 a.m., the temperature has dropped to 46 by 2:30 p.m. - often about the time a day's high is reached - at Philadelphia International Airport.
Some departing flights there were delayed two hours or more today because of conditions locally and elsewhere.
Service on SEPTA's Paoli/Thorndale Line was suspended between Malvern and Thorndale because of downed wires, and will not be resumed before the afternoon rush.
Street flooding was reported in Upper Merion and on Camden's Admiral Wilson Boulevard, traffic lights were out in Springfield, Easttown and Marple Townships, and a half-dozen accidents were tying up area roads shortly after noon, according to traffic.com.
Empty tractor trailers were banned for a while from the Ben Franklin, Walt Whitman, Betsy Ross and Commodore Barry Bridges.
A wind advisory, in effect until 2 p.m., warned of gusts of up to 45 m.p.h., for Philadelphia, its Pennsylvania suburbs, and most of New Jersey and Delaware, according to the National Weather Service.
A gale warning for the Jersey and Delaware coasts was advising all but the most experienced mariners "to seek safe harbor" until 6 p.m.
Much of Maryland and Virginia was even under a tornado watch this morning, with a severe thunderstorm warning for the Baltimore area.
Temperatures are expected to drop considerably, from a high in the low 60s today in Philadelphia to 30 overnight.
The Poconos and other parts of northeastern Pennsylvania could even see some snow.
Then, through the weekend, highs will be in the low 40s, lows in the upper 20s - colder than any previous days this season.
For more on the forecast, go to http://go.philly.com/weather.
Contact staff writer Peter Mucha at 215-854-4342 or firstname.lastname@example.org.