With a southerly flow of air turned off this weekend, heat will stay away from Philadelphia, but part of the weekend is likely to be unsettled.
Temperatures will average near to slightly below normal this weekend. Temperatures typically range from a low in the middle 60s to a high in the middle 80s F around the Philadelphia metro area.
A storm system from the Central states will cause rain to bulge northward for a time and brush the region Saturday into Saturday night.
How much rain falls on Saturday and how quickly the weather clears on Sunday will depend on the strength of that storm system.
According to Northeastern Weather Expert Dave Dombek, "A stronger, rather than weaker storm would allow more rain to fall farther north on Saturday but would also allow more drying and hence clearing farther south on Sunday."
Low clouds and drizzle could linger in part of the area on Sunday, especially south and east of the city.
"The daylight hours are long and the sun is strong this time of the year, so odds are in favor of clearing progressing across the region on Sunday," Dombek said.
Cool and unsettled weather will continue across the Northeast through late week.
Relief is on the way for portions of the Plains that are in the grips of the ongoing drought.
A tropical wave west of the Cape Verde Islands looks like it could be the next named tropical storm in the Atlantic Basin.
It was a rather active past few days with tornadoes, flash flooding, and damaging winds targeting many communities from Tennessee to Massachusetts and in Colorado.
A pair of tropical threats will target areas from China and Taiwan to Guam this week.
Following the thunderstorms of early in the week, the Nation's Capital will see cooler and less humid air midweek.
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