URGENT - WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
557 PM CST THU DEC 30 2010

...FOG WILL INCREASE AS WARM AIR RETURNS TO NORTHERN ILLINOIS...

.PATCHY DENSE FOG OVER NORTH CENTRAL AND FAR NORTHEAST ILLINOIS IS
EXPECTED TO CONTINUE TO THICKEN THIS EVENING. WHILE VISIBILITY
REMAINS ABOVE A MILE IN MANY AREAS EARLY THIS EVENING...CONDITIONS
WILL LIKELY DETERIORATE AS MOIST AIR CONTINUES TO SPREAD NORTH
ACROSS OUR REMAINING COLD GROUND AND SNOW COVER. THIS WILL LIKELY
RESULT IN DENSE FOG ACROSS NORTHERN ILLINOIS OVERNIGHT.

COUNTY SPECIFIC MESSAGE:

/O.CON.KLOT.FG.Y.0018.000000T0000Z-101231T1300Z/
WINNEBAGO-BOONE-MCHENRY-LAKE IL-OGLE-LEE-DE KALB-KANE-
INCLUDING THE CITIES OF...ROCKFORD...BELVIDERE...WOODSTOCK...
WAUKEGAN...OREGON...DIXON...DEKALB...AURORA
557 PM CST THU DEC 30 2010

...DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM CST FRIDAY...

A DENSE FOG ADVISORY REMAINS IN EFFECT UNTIL 7 AM CST FRIDAY.

* TIMING...FOG WILL BECOME DENSE TONIGHT.

* VISIBILITY...LOWERING TO A QUARTER MILE OR LESS IN WIDESPREAD
COVERAGE.

* IMPACTS...LOW VISIBILITY MAY MAKE TRAVEL HAZARDOUS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A DENSE FOG ADVISORY MEANS VISIBILITY 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.