Snow, Ice Possible This Weekend in Pa.

Yes, you heard about the warmer-than-ever December. But you didn’t really think that was going to last?

And while Christmas may be the warmest on record, weather forecasters came up with a forecast for this weekend that was a little bit of a surprise.

Some snow and ice pellets are expected to fall overnight in parts of Pennsylvania, the first of the not-quite-winter season.

You may not be building a snowman just yet. But there could be enough snow in the Lehigh Valley to make things slippery.

The National Weather Service is also warning of the possibility of ice in the Philadelphia region, including Bucks, Delaware, Chester and Montgomery counties. Montgomery County announced Friday it had declared a code blue due to the cold anticipated this weekend.

Indeed, the coldest air of the month will build across the Northeast and will produce some snow into the weekend, according to AccuWeather.

This shot of chilly air will feel even colder for many as temperatures have been well above average for most days since the beginning of November, according to an AccuWeather release.

The jet stream will finally dip southward on Friday, opening the door for colder air to build in from Canada, according to AccuWeather.

“This will be a sharp contrast in air masses compared to the mild conditions over the last several days,” AccuWeather Senior Meteorologist Matt Rinde said in the release.

The jet stream is a zone of strong winds in the upper levels of the atmosphere that tends to separate the cold air to the north and the warm air to the south, according to the weather service.

Those hoping to snowmobile or ski will have a day or two to enjoy the packed powder where the snow falls before a warmup will melt much if not all of the snow during next week, according to AccuWeather.