A fast-moving clipper system is spreading an area of snow across Iowa and Minnesota this afternoon and the area of snow appears to be Chicago bound. Snow should move into the metro area from the west late this evening reaching the I-39 corridor by about 9pm and overspreading the area by about midnight. While heavy snow is not expected, totals are forecast to be in the 1 to 3 inch range with the greatest amounts across the north portions of the region. The snow should end early Christmas morning.
The north portions of the Chicago area are guaranteed a white Christmas with snow cover ranging from 1 inch south to 8 inches near the Wisconsin state line. However, south portions of the area have little if any snow on the ground , a result of last weekend rains. If the overnight snowfall arrives as expected, most of the Chicago Metro area should log its first white Christmas since 2010 when 5 inches of snow covered the ground at O’Hare International Airport, the city’s official weather site. A location is considered to have a white Christmas if at least 1 inch of snow covers the ground on Christmas Day.