For the second straight day Thursday, O’Hare topped out at 89 degrees while Midway hit the 90-degree mark. Humidity again was high, with dew points in the mid to upper 60s.

Thursday afternoon, a strong upper air disturbance moved across Wisconsin accompanied by widespread showers and thunderstorms that reached as far south as northern Illinois. Parts of our area along and north of Interstate 80 were included in a severe thunderstorm watch.

Beginning Friday and continuing through the weekend into the first part of next week, our official temperatures at O’Hare should make it into the lower 90s. With every increasing humidity, the heat indexes may approach the 100-degree mark especially over the weekend.