It may be a good idea to keep the umbrella handy.
A warm front that will lift temperatures into the 90s on Wednesday might first create a little bit of chaos Tuesday evening as thunderstorms and high winds develop across the Chicago area.
Thunderstorms could hit north central Illinois, northeast Illinois and northwest Indiana Tuesday evening and overnight -- with damaging winds in excess of 60 mph, hail to the size of quarters, isolated tornadoes, heavy rain and frequent lightning possible, the National Weather Service warned.
A weakening thunderstorm complex passed over central and northern Illinois Tuesday morning and continues its slide southeast. Those storms produced brief wind gusts up to 40 mph and heavy downpours.
But the storms should continue across northern Illinois late Tuesday evening through the night. Should clouds clear out enough for the atmosphere to destabilize, strong winds could allow those storms to become severe, the weather service said.
Heavy rainfall is also possible Tuesday night across northern Illinois.
A warm front across the region with southerly winds increasing is bringing in warm and moist air, creating that risk for severe weather as thunderstorms develop in response to an “upper level disturbance,” the weather service said.
Although O’Hare was recorded at just 68 degrees at about 2 p.m. on Tuesday, temperatures will warm Wednesday into the upper 80s and lower 90s, the weather service said.