Shortly after 10 pm radar indicated the snow was ending in Lake County, Illinois after a 3 to 4 hour bout that dropped as much as 6 to 8 inches of snow on the area. The snow was also ending in far northern Cook County.
Snow reports continue to pour into the WGN Weather center
The latest evening snow totals include
8 inches at Gurnee
6 inches at Zion
6.2 inches Beach Park
3.5 inches Mt. Prospect
2.0 inches Oak Brook
The snow was accompanied by whiteout conditions and starting around 9 pm lightning and thunder especially on Chicago’s northwest side near Harlem and the Kennedy Expressway.
National Weather Service observer Phil Rider reports 3 inches snow at Mundelein this evening with melted down into only 0.10 inches of water yielding a 30:1 ratio. This means that 1 inch of liquid preciptation would yield 30 inches of snow.
Contrast this to Sunday night’s slush-fest that produced snow- to-water ratios of 6:1.
Since 9pm thundersnow has been reported at Devon and Central, Edison Park and at Franklin Park.
As of 9pm O’Hare International Airport had measured 1 in of new snow this evening and 1.6 inches for the day bringing the season total there to 50.3 inches. This makes 2009-10 the third consecutive 50 inch plus snow season, a feat achieved only once before in Chicago’s history.
2009-10 50.3″ (through 9pm Feb. 24)
Only other 3 straight 50 plus seasons
1976-77 54.1 “
1978-79 89.7″ (Chicago’s all-time snowiest winter)
Shortly before 9 pm radar indicated the band of heavy lake effect snow was slowly moving south out of Wisconsin with the snow about to end at Kenosha. A solid band of heavy lake effect snow covered all of Lake County, extreme southeast McHenry County southeast Kane County, the northern portions of Will and Kendall counties and north and west portions of Cook. The snow was falling at intense rates of more than an inch an hour and visibilities were dropping to 1/4 mile or less at the height on the snow
Two inches of new snow was on the ground at Mundelein. 2 1/4 inches at Mt. Prospect and 1.0 inches at O’Hare. Thundersnow was reported at Devon and Central shortly before 9pm.
The heavy snow band dropped 1.4 inches of snow in Northbrook in just 45 minutes this evening. A late report indicates that heavy snow has just begun in Oak Brook.
White-out conditions have been reported in Wheaton near Butterfield and Naperville roads.