Final Call Snowfall Forecast for First Snow of the Season in Pennsylvania
Temperatures are dropping rapidly from west to east as a strong cold front moves in. Cold northwest winds of 20–40 mph will bring heavy lake effect snow and a wintry feel early in the week.
Cold Front and Temperature Drop
By Tuesday morning, wind chills will fall into the single digits and teens, creating a frigid start to the day. Most areas will need heavy winter clothing throughout Tuesday. Daytime highs will struggle to reach 50°F for much of the week ahead.
Snow Forecast
Rain will transition to light snow in parts of Western Pennsylvania from late Sunday night into early Monday morning. Initially, the snow may not accumulate due to above-freezing ground temperatures. However, conditions will quickly change by Monday morning.
Projected Conditions
- Monday Morning: Scattered snow showers expected across Northwest Pennsylvania and the Laurel Highlands.
- Late Monday Afternoon: Lake effect snow squalls intensify, impacting the evening commute.
- Monday Night into Tuesday Morning: Temperatures drop into the 20s, allowing snow to accumulate efficiently.
Forecast Models
“Below is the HRRR model for 8:00 AM Monday. Lake effect snow squalls will really start to get going late Monday afternoon into the evening commute.”
“Here’s the model for 6:00 PM Monday. Lake effect snow will be most intense Monday evening through Tuesday morning.”
Summary
Cold air, gusty winds, and persistent snow bands signal the start of Pennsylvania’s first significant winter weather of the season.
Author’s summary: A strong cold front brings plunging temperatures and the season’s first snow, with increasing winds and widespread accumulation through early Tuesday.