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For many of our areas, an extended
heatwave likely continues this week
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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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Thunderstorm chances remain the next couple of days, but not as numerous… watching a late week coastal low…

I listed scattered chances for PM thunderstorms again on Tuesday, which will be the result of Monday’s backdoor cold front, now a stalled boundary near the region Tuesday, moving back northward as a warm front late Tuesday and Tuesday night. Storm coverage and intensity will not be nearly as numerous and impactful as Monday, and could end up more isolated rather than scattered. Highs will be notably lower on the north side of the front today.

Wednesday could still see isolated thunderstorms late day or evening, but more of the air mass variety as humidity and temperatures increase. A dry day and a break on Thursday with partly cloudy skies and hot temperatures, then clouds increase overnight. A coastal low gathers Friday and begins to move northward. Best forecast at the moment would suggest mostly cloudy skies, then numerous scattered showers and thunderstorms are expected with the coastal low Friday afternoon through at least part of Friday night. This coastal low pulls away from the region late Friday night, then Saturday is back to mainly dry conditions with isolated thunderstorms late in the day, expected to become more numerous overnight as a cold front works through. Sunday looks mostly if not entirely dry, but opted to leave a stray storm in the forecast with timing uncertainties with the front from the night before. Monday is also partly cloudy with an isolated late day t-storm possible. Fairly typical summer pattern continues.

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Forecaster:  Martrich 7 July 0300z

Daily climatology for Philadelphia, PA

Average highAverage lowRecord high temp (year)Record low temp (year)
87°F69°F103°F (2010)55°F (1979)