A brief surge of milder air through Monday morning will be followed by a dangerous cold blast in Philadelphia.
Philadelphia will escape the worst of the snowstorm that is taking aim at Chicago, St. Louis and Detroit.
The track of the snowstorm will instead lead to a brief rebound in temperatures and some rain for Philadelphia through Monday morning.
Also accompanying the rain will be areas of potentially dense fog that will lead to slow travel for motorists and possible flight delays.
Temperatures will return to the 40s from late Sunday through Monday morning.
However, the warming wasn't quite fast enough to prevent a bit of rain from freezing on some surfaces earlier on Sunday. There were many reports of accidents throughout the Delaware Valley, including some speed restrictions on bridges. Along with that, Philadelphia International Airport had a ground stop in effect for several hours.
Slick spots will once again be a concern for motorists and residents as the snowstorm's cold front sweeps through and ushers in dramatically colder air.
Temperatures will plunge from the upper 40s Monday morning to the lower 30s late Monday afternoon, causing any standing water on untreated roads and sidewalks to turn icy. The invading cold air will also cause the rain Monday morning to end as a little snow.
Lows in the single digits Monday night, highs in the teens on Tuesday and dangerously colder AccuWeather.com RealFeel® temperatures will force those in Philadelphia to bundle up to avoid enduring frostbite or hypothermia.
Thunderstorms are set to return to the Plains for the first week of May following a relatively quiet end to April.
A 4.2-magnitude earthquake shook Lower Michigan on Saturday with weak shaking reported westward to the Chicago area.
After a cooler-than-normal summer 2014, the Northeast can anticipate more 90-degree days. Meanwhile, drought conditions will expand in the West.
Strong thunderstorms threaten to close out the weekend across parts of the Upper Midwest, posing risks to those with outdoor plans and potentially causing damage.
Earlier this week, a lava lake churning within a crater near the summit of Hawaii’s Kilauea Volcano rose to record heights, offering visitors a rare glimpse of molten lava splattering above the vent rim before it overflowed.
Early indications suggest that the first tropical system of 2015 could spin up off the southern Atlantic Coast of the United States this week.
New Orleans, LA (1978)
Persistent thunderstorms caused worst flooding in 30 years at New Orleans; lightning ignited an oil storage tank at Covent, LA.
Kanab, UT (1982)
Sinbad the Sailor, the horse President Reagan rode on the TV series Death Valley Days, was struck by lightning and killed in Kanab, UT.
Bismarck, ND (1991)
Snowfall of 6.1".