Oak Forest, IL Severe Weather Alertstar_ratehome

...Patchy Shallow Freezing Fog Tonight...

Shallow freezing fog is developing late this evening outside of
Chicago, some of which is locally dense. The fog may expand in
coverage as temperatures continue to cool overnight. If traveling,
be prepared for sudden changes in visibility. Where locally dense
fog develops, patchy slick spots may also occur due to the sub-
freezing temperatures.