Cold air plunge

Temperatures nearly twenty degrees below zero have been found across southern Canada spilling into the northern Plains this morning.  A very strong Arctic high pressure system will move across the Plains today and Friday and into the Midwest by Saturday. 

As low level moisture interacts with a trough of low pressure, we'll continue to see fog and haze develop across Iowa, Illinois and Wisconsin.  Arctic air moving in behind a cold front will keep the snow flying across the Plains and upper Midwest this afternoon and will cause a mixture of rain and snow here later tonight and early Friday morning.

As the cold air spills into the central Plains, Winter Weather Advisories have been issued for parts of the Dakota's, Kansas and the panhandles of Oklahoma and Texas.  Rain, freezing rain, sleet and snow are all expected today and tonight.