A powerful low pressure system sitting off the west coast is forecast to move out into the central US and bring havoc to large portions of the central and eastern US. Significant amounts of ice and snow accumulations are forecast over a wide area. Ice storm warnings and winter storm warnings have already been issued for a large area! Further north, bitter cold wind chills are forecast across the northern half of the US!
Crippling ice accumulation amounts are forecast for portions of AR/TN/KY.. These areas have been placed into an ICE STORM WARNING already.
There are very large swings in the snow output from models.. Look here at the NAM output from the latest run (left – 00z) and the right (18z).
Here is the latest Hi Res NAM forecast output.. This is different than the low res NAM above!
Lastly, bitter cold temperatures will cause wind chills to dip into dangerously cold values. Some areas in the far northern plains are forecast to see wind chills near or below -50!