A tornado warning was issued in northwest Indiana and most Chicago-area counties saw severe thunderstorm warnings on an eventful Sunday afternoon.

The Chicago area could see strong-to-severe thunderstorms on Sunday, with isolated tornadoes and damaging winds possible.

The Storm Prediction Center has areas southeast of I-55 in an "Enhanced Risk," this is a level 3 of 5 on their severe risk scale. Locations near and along I-55 are in a "Slight Risk" (level 2 of 5), and then north and northwest portions of Chicagoland are in a "Marginal Risk" (level 1/5).

National Weather Service weather balloon releases — tracking temperature, pressure and wind speed — have been temporarily suspended in Omaha, Nebraska, and Rapid City, South Dakota, because of staff shortages and reduced at six other sites in the Midwest and Great Plains, according to agency memos.

The Chicago branch of the National Weather Service tweeted out: "The potential for severe weather returns as early as Tuesday night (threat level 1 and 2 of 5) as multiple waves of storms life across the area, mainly after midnight. Large hail, gusty winds and lightning are the main hazards of the storm."

An intense line of thunderstorms moves into Chicago after 1 p.m. The threat of severe weather has increased across Chicago, with the risk of damaging wind, hail, and multiple tornadoes. The threat of severe weather ends by 9 p.m.

The current situation places nearly two million individuals at risk, with the Storm Prediction Center categorizing the threat level as a 3 out of 5. Areas such as Peoria, Decatur, and Champaign face the highest risk of strong tornadoes, making it critical for residents to take proactive measures:

Most of central Illinois is under an Enhanced Risk of severe weather for Sunday, according to the Storm Prediction Center.