While models decide their differences in the next day or so with the incoming precipitation threats, the one thing the pattern is adjusting to show is the appearance of arctic air masses invading the Northern 2/3rds of the CONUS.  While large sustained +PNA is present, we will be getting some major league arctic air invading our region and the eastern 1/3rd of the country.  While CA and the SW US bakes in record heat and fire weather, the MS Valley eastward will be experiencing the first cold winter snap of the fall season.  While October snowfall wasn't the case this season, it appears we will not escape November without a few chances of snow.  With such an arctic air mass in charge the coming weeks, we will see record highs and lows fall.  Right now, get the winter gear in order, we will need it.