A winter storm that brought snow, sleet and freezing rain to a large swath of the Midwest swept into the mid-Atlantic and Northeast on Thursday, causing treacherous travel conditions, prompting school delays and closures and potential power outages for millions of Americans.

"February is kicking off with a very stormy pattern," AccuWeather meteorologist Bernie Rayno said. "A parade of three winter storms will bring snow, ice and sleet to millions of people from the Midwest through the Northeast.”

A powerful winter storm is bringing heavy rain, snow, and dangerous ice accumulations across the U.S., disrupting travel, closing schools, and increasing power outage risks. Authorities urge caution as conditions worsen into next week.

Forecasters are warning of possibly significant ice accumulations in several mid-Atlantic states that could cause widespread power outages and disrupt travel

Millions of people across more than 20 states from the Midwest to the Northeast are on alert as the first in a pair of ice storms begins to impact travel due to widespread freezing rain. FOX Weather Meteorologist Britta Merwin and Craig Herrera have the forecast.