AccuWeather: Summer officially arrives as heat index values near the triple digits
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PHILADELPHIA (WPVI) -- Temperatures continue to climb this week with heat index values near the triple digits heading into the weekend.
THURSDAY: Mostly sunny, hot and humid. High 92. Heat Index 95. Summer official arrives at 4:51 p.m.
TONIGHT: Mostly clear, warm and humid. Low 72.
FRIDAY: Hotter and more humid. Heat index values will be around 100 degrees. A backdoor cold front could bring an afternoon or evening pop-up thunderstorm especially north/west of the city. High 94.
SATURDAY: Sunny, hot and humid. Heat index values will be around 100 degrees or hotter. A pop-up shower or storm is possible. High 95.
SUNDAY: This is the peak of the heat! Heat index values will be around 100 degrees or hotter. We're forecasting a high of 96. A few showers and thunderstorms can't be ruled out.
MONDAY: Partly sunny, hot and humid. A spotty thunderstorm is possible during the afternoon with an approaching cold front. High 92.
TUESDAY: Mostly sunny, not as hot and less humid behind the front. High 90.
WEDNESDAY: Sunny, hot and humid. High 93.
