Snapshot of December

Average highs really take on a wintertime look.
For Louisville...
Dec 1 - Avg High = 51; Avg Low = 34
Dec 31 - Avg High = 43; Avg Low = 27

From the Climate Prediction Center...
Temperatures:

Precipitation:

According to the CPC, they are forecasting that the period from December 6-10 will average near normal for temperatures while precipitation is forecast to be above normal.

In addition, for the period from the 8th thru the 14th, above normal temperatures and precipitation are expected.

It could be possible that the CPC is forecasting this scenario based on recent, ongoing teleconnection signals involving the NAO/AO, whose values are expected to be neutral to positive over the coming several days, while the PNA is expected to be negative.

This has been a concern to me, as I noted this trend a few days ago. Serious cold air will be lurking not too far away from our region for the next couple of weeks. In fact, during the first week of December, we should get a taste of what a Polar Pop is like. However, after this period, temperatures are expected to be milder, either supporting all liquid or possible icing, if we get into a shallow layer of Arctic air near the surface while 850mb temperatures may be warm enough to support rain. This would be during the 7-9 period, primarily. Something to keep an eye on.

Personally, I'd rather have the snow. Things always change. Let's hope so.

MS