As the East Coast battled ice and freezing rain Saturday, a storm developing in the Plains, coupled with a new blast of arctic air from Canada, was expected to bring more heavy snow and dangerously cold wind chills to the nation’s mid-section for the weekend, the National Weather Service forecasts.

In parts of the East, the freezing rain created widespread travel headaches, orompting Dulles International Airport outside Washington, D.C., to close all runways Saturday morning.

The weather service says the front is expected to drive temperatures down sharply and quickly in the central states, with 60 and 70-degree temperatures in Oklahoma and Texas likely dropping as much as 25 degrees within an hour as it moves through.

Subzero nighttime temperatures will extend as far to the south as parts of New Mexico, Texas, Oklahoma, Kansas, Missouri, as well as into sections of Indiana and Michigan.

A stretch of northern-tier states from Montana to Wisconsin could see nighttime temperatures hitting minus 30…