Thunderstorms, Gusty Winds, High Temps In PA’s Monday Forecast: NWS

PENNSYLVANIA - Ahead of Thursday’s official start to autumn, the region is slated to see summer temperatures just short of record-highs and possible thunderstorms.

Temperatures are expected to reach the high 80s, per the National Weather Service, and are set to drop into the high 50s by Monday night. A weak cold front passing through the area will bring the likelihood of showers and thunderstorms with gusty winds Monday afternoon into the evening; an isolated severe thunderstorm is also possible, forecasters said.

As of Monday morning, all Pennsylvania counties including and west of Lancaster, Berks, Schuylkill, Lebanon, Luzerne and Pike counties are under a hazardous weather outlook.

"Isolated thunderstorms capable of producing strong to marginally severe wind gusts are possible today," forecasters said.

The region slated to see the most impacts from the possible storms are areas along and northwest of the I-95 corridor, National Weather Service forecasters said in a morning discussion. However, some models point to storms reaching as far as the southeast Lehigh Valley and far northwest New Jersey.

Any precipitation should be cleared from the area Tuesday, forecasters said, with low clouds and fog to characterize the morning commute. Otherwise, expect highs in the lower 80s, according to AccuWeather.

Wednesday, however, will begin with mostly sunny skies, transitioning to possible thunderstorms late Wednesday due to another passing cold front, the National Weather Service said.

Here’s the latest forecast, per the National Weather Service:

Monday: A slight chance of showers and thunderstorms after 2 p.m. Some of the storms could produce gusty winds. Mostly sunny, with a high near 86. Southwest wind 5 to 15 mph.

Monday Night: A chance of showers and thunderstorms before 9 p.m. Some of the storms could produce gusty winds. Partly cloudy, with a low around 62. West wind around 5 mph.

Tuesday: Sunny, with a high near 78. Northwest wind 5 to 10 mph, with gusts as high as 20 mph.

Tuesday Night: Mostly clear, with a low around 57. Northwest wind around 5 mph becoming calm.

Wednesday: Mostly sunny, with a high near 82. West wind 5 to 10 mph becoming southwest in the afternoon.

Wednesday Night: A chance of showers and thunderstorms. Mostly cloudy, with a low around 62. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.