The major storm is set to hit starting on Jan. 23 and will stretch into the weekend, spreading snow and ice from the southern Plains to the Northeast.

Impacts from the snow and ice could cause power outages, widespread travel shutdowns and school closures. Following the storm, frigid temperatures will prolong the impacts of the snow and ice. “Potentially hundreds of thousands of people may go without electricity and heat for days,” AccuWeather chief meteorologist Jonathan Porter said.

A massive winter storm of ice and snow will make its way across the country starting Friday, impacting 200 million people in 40 states from Arizona to Maine.