the sky is falling?

Unknown Precip 6°F Feels Like -10°F Updated Jan 19 01:45 p.m. CT Watch the Chicago Forecast	UV Index: 1 Low Wind: From W at 14 mph gusting to 19 mph Humidity: 47% Pressure: 30.35 in. Dew Point: -7°F Visibility: 7.0 miles FREE weather on your desktop

So what exactly is precipitating that we can't qualitatively decide on what it is?