January 22, 2013 8:14 am Wind Chill Explained NBC Chicago meteorologist Alicia Roman explains the definition of wind chill and how it affects you, especially on a frigid-cold day. Local 2:22 CHICAGO'S FORECAST: Rainy Monday Commute 2:10 Chicago Forecast: More storms in the forecast 2:22 CHICAGO'S FORECAST: Storms throughout Sunday 2:29 Chicago Forecast: Warm & windy Saturday; strong evening storms 2:13 Latest forecast from the NBC 5 Storm Team