Friday: The first decent weather system/cold blast of the season is impacting the central US and Midwest with rain, snow, and cooler than normal temperatures. It’s quite warm out ahead of the system, but will cool off rapidly as the storm moves into the eastern US this weekend. The water vapor satellite image highlights these features. Overnight lows behind the cold front will drop into the teens and 20s, resulting in the first widespread frost of the season, surging nat gas demand to much stronger levels compared to recent weeks. The last image shows the real-time radar loop with snow and thunderstorms over the Midwest.