From this morning's Tribune website:
Issued by the National Weather Service at 4:46 am CDT on March 20, 2008Nothing says Spring in Chicago like the forecast of snow.
... Winter Storm Watch now in effect from late tonight through
late Friday night...
.Snow is expected to overspread the area after midnight tonight
and continue through the day Friday before diminishing early
Friday evening. There is a potential for storm total snowfall
accumulations of 5 to 7 inches over much of the watch area.
A Winter Storm Watch means there is a potential for significant
snow... sleet... or ice accumulations that may impact travel.
Continue to monitor the latest forecasts.