While the weekend started on a wet and mild note, drier air will work into Philadelphia for Sunday. Frigid air will not.
Until the rain departs Saturday evening, there is the potential for urban flooding and travel delays. Thunder and lightning may accompany the rain in some areas.
Temperatures will flirt with record high levels during the storm, especially Saturday evening.
In the wake of the storm, dry weather will end the weekend and it will turn cooler, but not colder immediately. This is because the source of the air moving in Sunday will be from the Pacific Ocean.
However, gusty winds could cause some delays at airports in the Northeast on Sunday.
Colder air will return in stages with the first not due in until Wednesday or Thursday. Before that, temperatures will rise to near the 50-degree mark both Monday and Tuesday.
AccuWeather.com Senior Meteorologist Kristina Pydynowski contributed to the content of this story.
A developing tropical storm, moving just north of the large islands of the Caribbean, will take aim at the Bahamas and southern Florida into this weekend.
Regions dealing with Zika-carrying mosquitoes could have another threat to monitor as tropical activity picks up this season.
Showers threaten to put a damper on some festivities during the late summer bank holiday, especially early in the weekend.
Thunderstorms with the risk of locally severe weather will extend from the central Plains to the eastern Great Lakes into Thursday evening.
One of the most widespread and intense heat waves of the summer will be entrenched across most of Germany through the weekend.
10 degrees in Bowen, coldest August temperature ever in United States.
Philadelphia, PA (1972)
Last of 25 straight days without measurable rain.
Sturtevant, IN (2001)
A tornado 3 miles north-northwest of town. The tornado destroyed a hay barn with a horse trailer pushed out the back of the barn. A power pole was snapped off and wires were downed near Old Highway 11. A speed trailer near Highway 11 and I-94 was destroyed. Large barricades were lifted from the south side of Highway 11 and moved to the north side. Total losses exceeded $30,000. The path length of the tornado was 3 miles.