O’HARE: 76°F LAKEFRONT: 76°F Friday 7/21/2017 3:08:21 AM
Storms mostly south of I-80 caused by instability with clash of hot, humid air with cooler lake breeze outflow from Lake Michigan. Next chance for heavy rain of 1 inch or more is 1:00 a.m. to 6:00 a.m. early Saturday, July 22, 2017.
Heat Index of 98°F about 4:00 p.m. Saturday could make late Saturday afternoon the most uncomfortable day of this week’s muggy weather.
OVERNIGHT: A slight chance of showers and thunderstorms between 4am and 5am. Areas of fog. Otherwise, mostly cloudy, with a low around 72. Calm wind. Chance of precipitation is 20%.
FRIDAY: A 50 percent chance of showers and thunderstorms, mainly after 2pm. Areas of fog before 9am. Otherwise, mostly cloudy, with a high near 88. Light and variable wind becoming southeast 5 to 10 mph in the morning.
FRIDAY/SATURDAY OVERNIGHT: Showers and thunderstorms likely, mainly after 2am. Some of the storms could produce heavy rainfall. Mostly cloudy, with a low around 73. South wind 5 to 10 mph. Chance of precipitation is 70%. New rainfall amounts between 1 and 2 inches possible.
Chicago Weather Forecast for your MAC/PC/TABLET includes surrounding suburbs.
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