A 'bomb cyclone' is intensifying severe winter weather for millions of people across the U.S. The system is expected to knock out power and disrupt holiday travel.

NWS warns of a severe winter storm with blizzard conditions across six states, threatening post-holiday travel.

"An impactful storm system will move into Michigan Sunday into early next week, with accumulating snow, strong winds, and blowing snow," the National Weather Service in Grand Rapids said on Facebook. "The best chances for heavy snow will be across the Upper Peninsula, and the snow belts of lower Michigan.

Blizzard Warnings are in effect for all counties in red. This warning will be in effect until 9 a.m. on Monday for most. Winter Storm Warnings are in effect for counties in pink. These warnings will be in effect until 9 a.m. on Monday.

The Storm Prediction Center put much of Illinois, Indiana, southern Michigan, and northwest Ohio under level 1 and 2 risks.

A colorful patchwork of warnings and weather advisories have been issued as this powerful storm advances toward Michigan.

Travel conditions on Monday will be treacherous as a powerful Winter Storm takes aim at Michigan. High winds, blowing snow and extremely low visibility expected.

TVA storm could bring freezing rain to parts of Massachusetts Sunday night overnight into Monday, causing icy conditions. Sunday began with plenty of sunshine despite the frigid temperatures. As the day progresses,