Humid, unstable conditions are ripe for another round of scattered thunderstorms anywhere in the Chicago area this afternoon and into tonight.
For the latest radar, conditions and forecasts check the Chicago Weather Center.
WGN/Tribune meteorologist Tom Skilling says the region sits in the volatile space between two domes of intensely hot air--one in the Plains, the other over the Eastern U.S.
As heated, moisture-rich air rises, it cools to form condensation in cumulonimbus clouds, also known as "thunderheads."
Locally heavy rain could hit some areas as the storms move through, and while the lightning and winds could be dangerous, the rain would be welcome in any portion of drought-stricken Illinois and Indiana.
Temperatures were expected to approach 90 during the day and drop into the low 70s overnight.