6:00 AM | **Cooler for the remainder of the week...patchy frost late tomorrow night...monitoring weekend coastal storm threat**

6-Day forecast for the Philadelphia, PA metro region

Today

Mainly cloudy in the morning with showers, partial sun in the afternoon, becoming breezy, cooler than yesterday, highs near 70 degrees; W winds around 5 mph during the AM hours, N-NW winds around 10-15 mph during the afternoon

Tonight

Mainly clear, quite chilly, lows in the lower 40’s

Thursday

Mainly sunny, cool, lower 60’s for afternoon highs

Thursday Night             

Mainly clear, cold, possible late night patchy frost, middle 30’s for late night lows

Friday

Mainly sunny, cool, middle 60’s

Saturday

Increasing clouds, cool, upper 60’s

Sunday

Mainly cloudy, breezy, cool, chance of rain, middle 60’s 

Monday

Partly sunny, breezy, cool, chance of showers, low-to-mid 60’s  

Discussion

Lingering showers this morning as a cold front works its way through the region and it’ll turn noticeably cooler for the remainder of the week following the unseasonably warm start on Monday and Tuesday. Canadian high pressure will take control of the weather by tomorrow and it’ll lead to excellent radiational cooling conditions later tomorrow night with clear skies and light winds. As a result, the first frost of the season is possible in many spots by early Friday morning with overnight lows way down in the 30’s.

Looking ahead to the weekend, strong low pressure will form over the western Atlantic Ocean and likely produce heavy rainfall and strong winds for the Carolinas. This system has an increasing chance of impacting the Mid-Atlantic region as well with some heavy rainfall and strong winds, but an “escape” to the east-northeast and away from the Mid-Atlantic coastline is still a scenario that is on the table. The time period of concern for the Mid-Atlantic region for rain and wind would be from Saturday night to Monday.

Meteorologist Paul Dorian
Arcfield Weather