More than 120 million people are on alert for a brutal storm.

Half the U.S. population will likely see some effect from the sprawling storm that will move across the country this weekend, meteorologists said.

The Texas power grid system, which failed during a previous winter storm, could be put to the test this weekend as the region faces subfreezing temperatures and dangerous wind chills.

The Kansas City area is under a winter storm watch starting Friday at midnight, with between 5 to 7 inches of snow possible. Wind chills as low as 20 below zero are also expected, according to the National Weather Service.

The path of an approaching winter storm is not clear yet, but much of the country, including places unused to frigid weather, is bracing for the worst.

A winter storm watch is in effect beginning Saturday morning and continuing until Monday in Upstate South Carolina.

Travel disruptions, power ‌outages, ​and frigid temperatures are expected to ‌affect 150 million Americans on Friday and through the weekend as a massive storm ​clobbers the U.S. with heavy snow and freezing rain from the Central Plains to the East Coast,