Most southern and central Indiana communities are under a Tornado Watch until 8 p.m. Sunday.
A freeze watch is in effect from 2 a.m. Thursday until 10 a.m. Friday.
A record high temperature of 96 degrees was set in Indianapolis on Tuesday.
Wednesday the mid-west experienced a record high minimum temperature.
Temperature records from the National Weather Service show Indiana has been experiencing much lower temperatures this year than it did in 2012.
Residents should be on the lookout for special weather bulletins throughout the evening and overnight hours.
A significant snow storm is expected through Monday. Storm updates will be added here throughout the weekend.
Homeland Security officials say in addition to having a family emergency preparedness plan, homeowners should take steps to protect their property as well.
Scattered heavy snow showers expected through late afternoon.
Meteorologists say springs are generally becoming wetter and summers are becoming drier.