Each icon superimposed on this Sun eve Doppler radar image off WeatherTap images of National Weather Service Doppler radar data from the agency’s Romeoville forecast office is an observation station reporting a snow accumulation. The snowfall’s been fluffy, low-water content snow.
Observer Robert Friend near Beach Lake, IL reports the 2.7″ of snow down in his area has fallen with a snow/water ratio of 25 to 1 compared to the 10 or 12 to 1 considered “normal” in this area. When we say 25 to 1 ratio snow, we mean snow has volume with a volume that would fluff 1″ of water into 25″ of snow. (Clearly, this weather system lacks that kind of moisture–but we ARE seeing the first significant area-snow accumulation in the 8 months since March.
Here are a number of snow accumulation measurements from across the Greater Chicago area:
4.4″ Gurnee; 4″ Elburn; 3.8″ Gages Lake; 3.5″ Antioch; 3.5″ Burlington, WI; 3″ Genoa, IL and Racine, WI; 2.8″ Kenosha and Racine, WI; 2.7 Beach Lake, IL; 2.5″ South Elgin; 2.4″ Poplar Grove and Winnebago; 2.3″ Somonauk; 2.2″ Belvidere, Northbrook, Mt. Morris and Vernon Hills; 2.1″ Beloit; 2″ Rockford and DeKalb; 1.8″ Wheaton and Roscoe, IL; 1.7″ Capron, Stickney and Downers Grove and 1″ Montgomery, Peotone and Oak Lawn, IL.