Good Monday, folks. Here’s hoping each of you had a phenomenal weekend. The first work week of October is off and running with warm temps but a major change blows in late this week. That’s when a fall cold front brings some rain and very chilly temps. As a matter of fact, frost is possible by Sunday and Monday.

Highs today through Wednesday are in the low and middle 80s for the most part. Skies are dry with a mix of sun and clouds.

At the same time, a major buckle in the jet stream develops across the Rockies and Plains states. This will barrel its way to the east Thursday and Friday and into the weekend and has the chance to develop into quite the monster upper low…

My goodness, that’s highly anomalous for this time of year and resembles the week before this past Christmas.

This will be introduced by gusty showers and some rumbles of thunder sweeping across Kentucky late Thursday into Friday…

Can we get a wave of low pressure to develop and wrap up along this boundary and keep chilly showers into Saturday? It’s a possibility.

Temps behind this front will be dramatically cooler than where we are now and will be well below normal for early October. Highs may not get out of the 50s for some this weekend with lows that can reach the frosty cold 30s Sunday into Monday mornings.

I’ve talked a lot over the past few months about the blocky look to the pattern and I’ve been ramping that talk up even more of late.  Blocking patterns can create some monster upper level systems as evidenced by this upper level map for this coming weekend…

Is this a sign of the winter ahead? I’ll have some winter talk and breakdown with my next update.

Have a great Monday and take care.