New Years Day 2021..
Ice storm in Missouri, Illinois, Indiana, Ohio, Pittsburgh reporting freezing rain right now. Snow in Texas and Oklahoma.
There's actually 2 Upper Lows. One over Mexico not seen on this map and the one here. It's -7C at 9,000 feet over Oklahoma but above freezing at 9000 feet over Indiana.
Because of the pattern, there is a southerly flow East of that Upper Low and that's pushing warm air at the mid levels while surface is staying at or below freezing and precip is falling. It would of been all snow if it wasn't for that mid level warmth melting the snowflakes coming down
