Heavy rains, severe thunderstorms, heavy snows, high winds and blizzard-like conditions through Friday from the central Rockies, across the Plains into the Mississippi Valley and into the upper Great Lakes. Heavy snow is expected from northern Colorado, including Denver, to western Nebraska, central South Dakota and southeastern North Dakota. The barometric pressure falls very fast,” said AccuWeather meteorologist Brett Rossio. More than 1,200 flights within, into or out of the US were canceled as of Wednesday morning, the majority at at Denver International Airport. About 10,000 Xcel energy customers had sustained power outages by 9 a.m. Wednesday in Denver.
Watches, warnings and advisories for the storm cover about 1.5 million square miles, which is roughly half of the area of the continental US. More than 55 people million are under a high wind threat, more than 10 million are under winter storm threats, and more than 17 million are under a flood threat. A total of 70 millions will be affected. People were asked to cancel travel plans.