On the last official day of astronomical winter, a wild storm will pack severe weather with the potential for several tornadoes, but also powerful wind gusts in thunderstorms, showers, dusty air and blizzard conditions.

Strong tornadoes are possible near Chicago, while blizzard conditions have been blasting Nebraska and Kansas. Farther south, Oklahoma and Texas are facing critical wildfire danger.

Another significant winter storm is sweeping across the Midwest and central US with disruption likely. Millions of people along the storm's path from the West Coast to the Upper Midwest will experience significant weather impacts until Thursday.