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 .
Some high temperatures in U.S. could dip to 20 degrees below the average . Rockies , Appalachians and areas impacted by lake effect could see some snow . Plains , Northeast and Southeast may see most anomalous temperatures .