THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A DENSE FOG
ADVISORY...WHICH IS IN EFFECT UNTIL 10 AM CDT THIS MORNING.
* VISIBILITY...AREAS OF DENSE FOG WILL RESULT IN NEAR ZERO
  VISIBILITY IN SPOTS.
* IMPACTS...MOTORISTS WILL LIKELY ENCOUNTER RAPID REDUCTIONS IN
  THE VISIBILITY AS THEY ENTER THE DENSE FOG. THIS WILL MAKE
  TRAVEL HAZARDOUS. USE CAUTION AND REMAIN ALERT FOR RAPIDLY
  CHANGING CONDITIONS WHEN TRAVELING THIS MORNING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A DENSE FOG ADVISORY MEANS VISIBILITIES WILL FREQUENTLY BE
REDUCED TO LESS THAN ONE QUARTER MILE. IF DRIVING...SLOW DOWN...
USE YOUR HEADLIGHTS...AND LEAVE PLENTY OF DISTANCE AHEAD OF YOU.
&&