Some high temperatures in Carolinas could dip to about 20 degrees below the average . By Wednesday , the chill will grip the Northeast and Southeast , pushing the mercury about 20 degrees below average . Rockies , Appalachians and areas impacted by lake effect could see some snow . Plains , Southeast and Northeast may see most anomalous temperatures .
Some high temperatures in Carolinas could dip to about 20 degrees below the average . Rockies , Appalachians and areas impacted by lake effect could see some snow . Plains , Southeast and Northeast may see most anomalous temperatures .