CHICAGO (CBS) -- Showers settled on the Chicago area Wednesday evening, with thunderstorms possible early Thursday morning.

A severe thunderstorm warning was issued for LaPorte County, Indiana earlier in the evening.

The low for Wednesday night is 39.

A wet start Thursday will slow the morning rush. 

Drier air moves in for the afternoon hours.

The high for Thursday is 40.

The next system could bring late-day showers Friday. The high for Friday is 43.

Then, a changeover to wet snow comes Saturday morning. Minor accumulations are possible on grassy areas.

The next few days will feature a chilly flow off the lake.