In a normal winter, it happens maybe two or three times ... mark and 27% of the Lower 48 will be below zero (minus 18 degrees Celsius), according to National Weather Service forecasts. Meteorologists ...

Dangerously cold wind chill temperatures in the Dakotas and Minnesota of minus 40 Fahrenheit (minus 40 Celsius ... Iowa and much of Wisconsin. Winter weather advisories were issued for parts ...

A polar vortex collapse is expected to bring severe winter weather to Canada and the US mid-month. This event could also ...