How severe is the current winter storm according to the National Weather Service?

The National Weather Service has issued a critical warning about a winter storm carrying arctic air that poses extreme danger. Wind chill factors are expected to plummet to as low as -60°F (-51°C) in Montana and North Dakota, creating potentially life-threatening conditions across these regions. This severe weather system is part of a larger pattern affecting the central and eastern United States, bringing record cold temperatures that demand immediate precautionary measures. The arctic air mass represents one of the most dangerous cold weather events in recent years for these areas.