Harrisburg, PA – A stronger push of Arctic air is settling over Pennsylvania next week, setting the stage for a colder-than-normal stretch from December 9 through December 15. Forecast data from the NOAA Climate Prediction Center indicates temperatures will stay well below seasonal averages across much of the state, while several regions — including Pittsburgh — face a risk of snow, ice, and challenging travel conditions.
Arctic Pattern Strengthens Across the State
Pennsylvania’s early-December chill is not easing up. The long-range 8–14 Day Outlook, issued December 1 by NOAA, shows a firm hold of cold air across the Northeast and Great Lakes through mid-month. High temperatures are expected to stay in the 30s for central and western counties, while northern areas may see overnight lows sinking into the teens.
In western Pennsylvania, forecasters warn that Pittsburgh could see multiple rounds of light snow next week. While these systems are not expected to be major winter storms, consistent snowfall paired with freezing temperatures could lead to slick roads, icy bridges, and slower commutes.
Lake-Effect Snow Possible for Erie
Colder air sweeping over the Great Lakes will bring classic early-winter conditions to northwestern Pennsylvania. Erie, which commonly sees enhanced snowfall during these setups, may pick up periods of lake-effect snow through mid-week. Small shifts in wind direction could influence how much snow falls and which neighborhoods see the highest totals.
Eastern Pennsylvania Could Face a Mix
Philadelphia, Allentown, and surrounding communities may experience a different weather pattern. Instead of steady snow, forecasters expect a rain-to-snow mix, creating the potential for slippery conditions during morning and evening drive times. Temperatures hovering near freezing will be the key factor in determining whether roads become icy or remain merely wet.
Active Storm Track Expected
NOAA also projects above-normal precipitation across the Northeast, a sign that the storm track will remain active. That increases the likelihood of fast-moving systems capable of dropping bursts of snow, wintry mix, or freezing rain — especially for areas west and north of Interstate 81. Timing and intensity will vary, but the overall theme remains more unsettled weather through mid-December.
How Pennsylvania Compares to the Rest of the Country
While Pennsylvania braces for more winter weather, much of the West and southern United States is expecting the opposite pattern. California, Arizona, Texas, and several Gulf states are forecast to remain warmer and drier than normal. The conflicting temperature patterns highlight the contrast across the nation, with the East locked in a cold regime as the West trends mild.
What Residents Should Watch For
The biggest risks for next week include:
- Icy morning and evening commutes
- Light but frequent snow in western and northern counties
- Rain-snow transitions in eastern Pennsylvania
- Potential lake-effect bands near Erie
- Wind chills dropping into the teens in higher elevations
Residents are encouraged to monitor local forecasts daily since small temperature changes could shift snow-to-mix boundaries. Those traveling early in the morning or after sunset should stay alert for black ice, especially on untreated roads.
Slight Warm-Up Possible Later in December
Forecasters note that a brief warm-up may arrive closer to the holidays. However, confidence is low, and the current pattern strongly favors continued cold and occasional winter weather impacts through at least the middle of December.
As a result, Pennsylvanians should prepare for another week of true early-winter chill — with clouds, gusty winds, and periodic snow or ice remaining part of the forecast.
Have you noticed early signs of winter in your area? Share your experiences in the comments below.
