After pushing into the 90s Wednesday, likely the hottest day of the week for Philadelphia, the roller-coaster weather is on track to continue.
The area was under an air quality alert midweek for those with sensitivities such as asthma, as a hot, stagnant air mass hovered above the city.
Showers will eradicate this on Thursday as a weak disturbance moves in from the Ohio Valley. Storms could bring locally heavy rain, adding to what has already been the wettest summer ever recorded in Philadelphia.
From June 1 through Aug. 20, the city has received 273 percent of normal rainfall for the meteorological summer. The new record of 27.58 inches smashed the old record of 24.58 inches set in 2011.
Showers and a thunderstorm will usher in a cool front, dropping temperatures Thursday night. Lows in the 70s will bear a stark contrast to the 90-degree highs felt only 24 hours prior.
Humidity will remain low through the weekend with highs in the low 80s and plenty of sunshine.
The summer has been up and down for Philadelphia. The middle of July marked an intense heat wave, with temperatures pushing the mercury as high as 100 F at times. A cool period followed, bringing temperatures that, at times, more closely resembled fall than early August.