Snowfall depth forecasts have been downgraded for northern Cook County from 6"-8" to 4"-6". Most of Lake County and a small part of northeastern Cook County are in the forecast area for 6"-8". Most other regions are also downgraded, but snow is still expected.
URGENT - WINTER WEATHER MESSAGE
NATIONAL WEATHER SERVICE CHICAGO IL
905 PM CST THU FEB 23 2012
LAKE IL-DUPAGE-COOK-WILL-
INCLUDING THE CITIES OF...WAUKEGAN...WHEATON...CHICAGO...JOLIET
905 PM CST THU FEB 23 2012
...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 9 AM CST
FRIDAY...
* TIMING...RAIN AND WET SNOW WILL CHANGE TO ALL WET SNOW OVERNIGHT
* ACCUMULATIONS...TOTAL ACCUMULATION OF 2 TO 6 INCHES CAN BE
EXPECTED WITH LOCALLY HEAVIER AMOUNTS POSSIBLE. THE HEAVIEST
AMOUNTS WILL TEND TO BE FARTHER NORTH TOWARD THE WISCONSIN
BORDER WITH LESSER AMOUNTS SOUTH TOWARD INTERSTATE 80.
* MAIN IMPACT...HEAVY WET SNOW MAY FALL AT RATES GREATER THAN AN
INCH PER HOUR OVERNIGHT. THIS WILL LIKELY RESULT IN QUICK
ACCUMULATION OF WET SNOW ON ROADS... RESULTING IN SLIPPERY AND
POTENTIALLY HAZARDOUS TRAVEL CONDITIONS.
* OTHER IMPACTS...IN ADDITION TO ACCUMULATION AND SLIPPERY TRAVEL
IMPACTS...STRONG WINDS WILL RESULT IN WIND WHIPPED HEAVY WET
SNOW CAUSING SEVERELY REDUCED VISIBILITIES. DUE TO THE HIGH
LIQUID CONTENT OF THE SNOW...THOSE WITH HEALTH CONCERNS SHOULD
USE CAUTION WHEN SHOVELING. THIS ALSO MAY LEAD TO WEIGHTED DOWN
BRANCHES AND POWER LINES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A WINTER WEATHER ADVISORY FOR SNOW MEANS THAT PERIODS OF SNOW
WILL CAUSE PRIMARILY TRAVEL DIFFICULTIES. BE PREPARED FOR SNOW
COVERED ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE
DRIVING.