What I'm Thinking

A trough is an extended area of low pressure where air rises, creating cooler, cloudier, and frequently wetter conditions, whereas a ridge is an extended area of high pressure where air sinks, resulting in warm, dry, and sunny weather. You can picture this by imagining the jet stream as a wave. Ridges are the upward humps that promote stability, and troughs are the downward dips that bring unsettled weather.

Our weather has been locked into this pattern for most of winter. This means the winds that direct our weather have been mostly in a zonal flow (black arrow). For Kentucky to have a big snow, we need the ridge in the west to break down. This will allow a trough to deepen and dig further to the south. A weather system will ride in the area where the trough and ridge meet. Under the setup we are in, it is causing a zonal flow, so a system will ride out into the Atlantic. Also, it may not phase with moisture from the Gulf.

The date from the long-range climate forecast model for February suggests that this configuration might be failing, in my opinion. The western ridge might begin to break down. More arctic air may be able to travel southward as a result, and any system that develops may be able to absorb more warm Gulf moisture. 

This far in the future it is impossible to predict any winter system that could bring any major or more accumulation of snow. I just think February is a month that could be interesting.