The National Weather Service Storm Prediction Center, Norman, Okla., has issued a tornado watch until midnight for Kosciusko, Elkhart, Fulton, Noble, Marshall and Whitley counties.

Other counties included in the watch are Adams, Cass, Jay, LaPorte, Starke, Wells, Allen, DeKalb, Grant, Pulaski, Steuben, White, Blackford, Huntington, LaGrange, Miami, St. Joesph and Wabash counties.

The National Weather Service Northern Indiana has issued a heat advisory until 9 p.m. tonight, Saturday, July 18. Temperatures will range from upper 80s to lower 90s. During the peak heat, the heat index values will range from 100 to near 110 degrees through the early evening.

The combination of heat and humidity will create oppressive conditions which may cause heat related illnesses to develop due to prolonged exposure, particularly with the elderly and those with pre-existing health conditions.