After basking in balmy air much of this week, a return to colder weather will be accompanied by multiple rounds of wintry mix into early next week around Philadelphia.
Rain Friday will become mixed with and change to sleet and snow before ending early Saturday morning. Temperatures Friday will start the day near 60 but will fall into the 40s during the afternoon and plunge into the 30s at night.
Odds are against slippery roads around the city and nearby suburbs with the first round, but there can be a couple of inches of snow well north and west of the city with possible slippery travel toward the Poconos and in central Pennsylvania.
After a break during the middle of this weekend, during which cold air will settle in, another storm will head in later Sunday.
That second storm will start cold then become warmer, so that a wintry mix changes to rain in most areas. However, the second storm will bring a greater chance of some slippery spots around the city for a brief time and perhaps more general slippery travel north and west.
A third storm system may or may not track close enough to bring a period of snow, rain or wintry mix for a time on Tuesday.
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Knowing when precipitation will stop and start allows for effective, last-minute decision making when weather impedes daily life schedules.
The temperature roller-coaster ride will continue into next week for the New York City area.
Mid-Atlantic/ East Coast (1936)
The first storm referred to as a blizzard. March 14th-16th... An editor at the "Dakota Republican" in Vermillion, SD, described the storm. "A violent snowstorm driven by a heavy (northwesterly) wind, commenced about 12 o'clock last Sunday night (12th) and continued three whole days and nights. The weather was intensely cold and the heavy fall flying before a furious wind - blowing as only prairie winds can blow - rendered travelling exceedingly uncomfortable and dangerous, if not almost impossible (issue of March 17, 1820)."
Philadelphia, PA (1803)
15" to 20" of snow.