The transition to a colder pattern for mid December is starting today and will likely last through the next couple weeks (and perhaps beyond). The first round of arctic air is starting to sink southward from Alberta, Canada. Winds will slowly increase with a few flurries today. Highs will be still be in the 40s this afternoon, however, with plenty of sunshine. The cold air will be quite noticeable by tomorrow morning as temperatures drop into the 20s. Highs for tomorrow and Saturday barely climb above freezing!
The next impactful weather system looks to arrive late Sunday into Monday. It looks like some snow showers are possible late Sunday or Sunday night. However, warmer air will likely arrive for Monday to change those snow showers over to rain showers. Once this system exits east of the state, another round of arctic air approaches for the middle of next week. Lots happening between upcoming rain/snow chances and temperature swings so stay tuned. No major storms are in the works just yet, but December is offering more active weather than the region has seen for much of the summer and fall months.