CHICAGO — Starting with some patchy fog across southern counties Tuesday with a few locations down to less than a mile of visibility.

Fog will burn off by mid morning and we’ll all start the day with clear sunny skies. Clouds will start to build back in by midday and some isolated scattered showers move in this afternoon.

Possibility of a few pop-up thunderstorms with this system but not expected to be strong or severe.

Highs today will reach the low to mid 80s with breezy westerly winds.

Wednesday we’ll see a better chance of more widespread showers and storms in the afternoon with highs in the low 80s.

Full forecast details and more at the WGN Weather Center blog

Thursday will be mostly sunny with more humidity building back into the forecast and highs in the mid 80s.

Another round of showers and storms possible on Friday with dry and sunny conditions expected over the weekend.

Tuesday: Sunshine mixes with cottony summertime cumulus as temps warm. Moderate humidities. Several scattered afternoon and evening showers and thunderstorms possible impacting 20 to 30% of the area. High 86.

Tuesday Night: Showers diminish then clouds scatter again. Warm. Patchy ground fog, especially cooler areas surrounding the city and close-in suburbs.
Low 68—with low 60s inland.

Wednesday: Clouding over, warm. Growing prospects for afternoon and evening showers and thunderstorms in 30 to 50% of the area. High 84 Low 69.