Sticky, unseasonable warmth stretching across the eastern United States this week will set the stage for a sprawling storm system that threatens to bring thunderstorms and heavy rain — weather more typical of spring than the dead of winter — from Thursday through Saturday.

A tornado that moved through Purcell during Thursday's severe weather outbreak has been confirmed as an EF-2, according to the National Weather Service.

A radar-confirmed tornado ripped across Interstate 35 and part of Purcell, Oklahoma Thursday morning, knocking down power lines as a powerful line of thunderstorms barreled their way across the Southern Plains.

A round of storms brings a severe weather risk that could produce hail and a tornado threat Thursday morning in Oklahoma.

Multiple tornado warnings were issued by the National Weather Service on Thursday after tornadoes were identified near Pink and Purcell, Oklahoma.

RAIN MOVING TOWARD KANSAS CITY, AND THERE’S A LOT OF IT. AND THERE’S ENOUGH INSTABILITY FOR A FEW STRIKES OF LIGHTNING. THERE WAS A STRIKE THERE NEAR OTTAWA. THERE’S A LITTLE STRIKE THERE TO THE WEST OF HARRISONVILLE.

A big warm front will bring 60s and more humidity to Indiana today. Scattered light rain is possible Thursday afternoon and evening. Storms arrive later tonight.

A storm trekking eastward across the U.S. will bring storms to the Plains on Thursday, with snow possible in Texas.