...DENSE FOG ADVISORY IN EFFECT UNTIL 3 AM CST SATURDAY...

* WHAT...Visibility below one quarter mile in dense fog.

* WHERE...In Illinois, Kendall, Grundy, Kankakee, Southern Cook,
Northern Will, Southern Will and Eastern Will Counties. In
Indiana, Lake County.

* WHEN...Until 3 AM CST Saturday.

* IMPACTS...Hazardous driving conditions due to low visibility.

* ADDITIONAL DETAILS...Expect rapidly changing visibility through
the early morning hours. The fog may also cause slippery spots
on untreated surfaces due to temperatures below freezing.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If driving, slow down, use your headlights, and leave plenty of
distance ahead of you.

&&

...Patchy Dense Fog this Evening...

Mostly clear skies and light winds this evening have resulted in
the formation of patchy dense fog, especially in open areas where
locally heavy snow fell during the afternoon.

Be prepared for rapid reductions in visibility on area roadways,
particularly those adjacent to open fields or located in shallow
valleys. The fog may also cause slippery spots on untreated
surfaces.