A powerful storm system will bring rounds of showers and thunderstorms to the Chicago area Tuesday night through Wednesday evening.

Some storms overnight into early Wednesday could produce hail and heavy rainfall, but the overnight severe risk is small.

On Wednesday, there will be rain and thunder in the morning with temperatures in the 40s. By the mid-afternoon, a warm front will surge north across the area — allowing temperatures to quickly climb into the 60s and 70s.

The warm front may spark numerous severe thunderstorms Wednesday afternoon into the evening hours. These afternoon and evening storms pose an enhanced threat of tornadoes, large hail, and damaging winds.   

Much cooler air arrives for the end of the week and over the weekend, with highs in the 40s. 

Forecast at a glance

Tuesday night: Showers and storms develop, and some may be strong. Low of 41.

Wednesday: Severe threat between 11 a.m. and 9 p.m. High of 68.

Wednesday night: Low of 45, showers and storms end after 10 p.m.