Forecasters say wind chills could drop into the teens and 20s at times this weekend.
Ozone levels are expected to be in the unhealthy sensitive groups range, according to the National Weather Service.
National Weather Service forecasters say scattered rain and snow showers will gradually end later tonight.
Heavy rain switches to snow later today and ice later today.
Forties again today, and near 40 tomorrow, but it won't stay that warm or that dry too much longer. Snow is coming back...
It reached 72 degrees Saturday in Indianapolis, breaking the old record of 67 degrees in 1983.
Cold temperatures and snow return to the weather forecast the next couple of days.
Southern Indiana and central Kentucky are facing a significant winter storm this weekend; Central Indiana will only see a dusting.
A winter weather advisory is in effect for blowing and drifting snow until noon on Tuesday.
The El Nino system that caused warmer temperatures is waning somewhat.