Final Call Snowfall Forecast for First Snow of Season in Areas of Pennsylvania

Temperatures are dropping rapidly from west to east ahead of a strong cold front. Gusty northwest winds between 20 and 40 mph, combined with heavy lake effect snow bands, are expected Monday and Tuesday, bringing a distinctly wintry feel.

Wind chills Tuesday morning will be brutally cold, with values in the single digits and teens across most areas. You can see the forecasted "feels like" temperatures at 7 AM Tuesday below. A heavy winter coat will be necessary throughout the day.

Cold Weather and Snow Details for the Week

Looking ahead to the rest of this week and into next, persistent winds and daily highs struggling to reach 50°F will keep winter conditions in place. Your winter coat will remain essential.

Snow Development Timeline

Late Sunday night into early Monday morning, rain will switch to light snow in parts of Western Pennsylvania. Initial snow accumulation will be limited as temperatures hover at or just above freezing.
By Monday morning, scattered snow showers are expected across Northwest Pennsylvania and the Laurel Highlands. The HRRR model shows this pattern at 8:00 AM Monday.
Lake effect snow squalls will intensify late Monday afternoon through the evening commute, with temperatures falling to the 20s where snow accumulates.
Snow accumulation is assured during this period. The 6:00 PM Monday model highlights this strong lake effect snow activity.
The heaviest lake effect snow will persist from Monday evening through Tuesday morning.

"Temperatures are crashing from west to east ahead of a strong cold front coming in! Gusty northwest winds of 20-40 mph and heavy lake effect snow bands are likely Monday and Tuesday, making it feel awfully wintry."

"Wind chills as you walk out the door Tuesday morning will be downright frigid, with most places in the single-digits and teens."

"Lake effect snow will be most intense Monday evening through Tuesday morning."

Author’s summary: A strong cold front will bring gusty winds, frigid wind chills, and significant lake effect snow to Pennsylvania, signaling the first major snowfall of the season and persistent cold through next week.

PA Weather Action — 2025-11-10