A major winter storm moved from the southern Plains into the eastern Great Lakes from 20 January to 21 January 2006. Temperatures were critical during the event with some areas remaining all snow while others began as rain and transitioned to snow. During the transition, ice in the form of sleet or freezing rain occurred.  Significant amounts of ice occurred in thunderstorms across far northeast Missouri, parts of west central, northwest, and north central Illinois. The last of the thunderstorms ended across Bureau and Henry counties of Illinois at 1900 CST.Radar data showed five distinct bands of heavier precipitation across the WFO DVN county warning area. These mesoscale bands of precipitation lead to snowfall and ice amounts varying greatly over small distances. Due to temperatures right around freezing, Lee and Des Moines counties in southeast Iowa and Henderson County in west central Illinois never received more than 0.20 inch of ice accumulation at any one time. Although not substantiated by ground truth reports, it is believed that extreme southern Warren county in west central Illinois received 0.25 inch of ice accumulation since it was in a heavier band of precipitation.Scotland and Clark counties in northeast Missouri along with McDonough and Hancock counties in west central Illinois received 0.25 inch ice accumulation followed by snowfall ranging from 0.5 to 3 inches. In Illinois, southeast Henry county and most of Bureau county received 0.25 inch ice accumulation with some areas up to 0.5 inch accumulation under the thunderstorms. Once the transition to snow was completed, co-operative observers in Bureau county received 6-8 inches of snowfall on top of the ice.Another mesoscale band of snow deposited 4 to 6 inches of snow in a band running from Fairfield Iowa in Jefferson County to Apple River Illinois in Jo Daviess County. A co-op observer in Lowden, Iowa (Cedar County) received 7 inches of snow in just under 9 hours.According to law enforcement, traffice accidents were most numerous in the areas that received significant ice accumulation whereas areas that received only snow reported no more than the usual amount of traffic accidents. Many schools either cancelled outright or had early dismissal before the worst of the ice accumulation began. Many trees were downed in areas that received significant ice accumulation.

Winter Storm in BUREAU, ILLINOIS
From 20-JAN-06 19:00:00 to 21-JAN-06 02:00:00 (CST)
Property damage: 5K
Reported by: TRAINED SPOTTER

Also from Co-op observers

Ice Storm in HENRY, ILLINOIS
From 20-JAN-06 18:30:00 to 20-JAN-06 22:00:00 (CST)
Property damage: 5K
Reported by: TRAINED SPOTTER

Also from Co-op observers

Ice Storm in MCDONOUGH, ILLINOIS
From 20-JAN-06 19:00:00 to 20-JAN-06 20:30:00 (CST)
Property damage: 5K
Reported by: TRAINED SPOTTER

Also from Co-op observers

Ice Storm in HANCOCK, ILLINOIS
From 20-JAN-06 18:00:00 to 20-JAN-06 20:00:00 (CST)
Property damage: 5K
Reported by: TRAINED SPOTTER

Also from Co-op observers

Winter Weather in HENDERSON, ILLINOIS
From 20-JAN-06 13:30:00 to 20-JAN-06 20:30:00 (CST)
Property damage: 2.5K
Reported by: TRAINED SPOTTER

Also from Co-op observers

Winter Storm in WARREN, ILLINOIS
From 20-JAN-06 15:00:00 to 20-JAN-06 20:30:00 (CST)
Property damage: 5K
Reported by: TRAINED SPOTTER

Also from Co-op observers.