The National Weather Service has issued a winter storm warning for Lake, Porter, Newton, Jasper and Benton counties beginning Sunday morning and lasting into the night.

Freezing rain, possibly mixed with sleet, will begin falling Sunday morning and persist through the evening. Pavement and ground temperatures are below freezing, and any rain will likely freeze on contact. Significant accumulation of ice on roads and sidewalks, powerlines and trees is possible. Increasing winds could cause power outages.

The National Weather Service is also warning of the potential for heavy rainfall Tuesday into Tuesday night, possibly resulting in flooding.

Indiana Department of Transportation spokesman Matt Deitchley said it’s monitoring multiple weather forecasts and plans to adjust deployment of manpower, trucks and materials to address forecasted and observed road conditions.

Most interstates, U.S. highways and state routes have been pre-treated with salt. He said road salt gets to work immediately once it makes contact with a wet surface. INDOT is making expanded use of a salt and water solution known as salt brine and pre-wetted road salt during this year’s winter storms. This new strategy is expected to be more effective against freezing rain and ice when accumulation is less easily plowed off the roadway, he said.