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Dangerous heatwave this weekend
with heat indices over 110° for some
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Southeast PA Forecast

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Basic CMYK

Our southeast PA forecast region includes Philadelphia, Doylestown, West Chester, Lancaster, York, Gettysburg & surrounding areas. Forecasts are updated daily M-F and Saturday that covers both weekend days – not Sunday. 

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Oppressive weekend period expected with dangerous heat and heat index values both Saturday and Sunday…

A strong ridge over the NE US will flex Friday through the weekend with upper 90s to near 100° air temperatures expected both days, and very high heat index values between 110-115° with the worst heat index values found on Saturday. Saturday will be partly cloudy and hazy, and muggy and warm temperatures follow overnight. A partly cloudy Sunday follows with upper 90s to near 100° once again, with a stray late day t-storm possible.

Variably cloudy on Monday with scattered t-storms possible that will keep temperatures in check as a cold front moves through, and then we can all breathe a sigh of relief by Tuesday with partly cloudy skies, refreshing temperatures, and much lower humidity. The lower humidity theme continues Wednesday through Friday with mostly sunny skies expected, and only a slight moderation in temperatures by the end of the week.

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Forecaster:  Martrich 20 July 0300z

Daily Climatology for Philadelphia, Pa

Average Temp:Record Temp:
High:8799 (1930)
Low:7057 (1890)