Illinois Weather Trivia for February 17th
- Unseasonably mild weather spread across central Illinois, which continued until the 20th. High temperatures during the period were in the lower to mid 60s, values which are more typical for April rather than February.
- A major winter storm exiting the Southern Rockies moved through the Mississippi Valley, and into the Great Lakes. The storm system resulted in a variety of weather, ranging from heavy snow, to freezing rain, and rain. Widespread heavy snow occurred in northern Illinois, where amounts ranged from 5 to 10 inches, with some 12 inch totals in the Chicago area. Further south, an ice storm affected central parts of Illinois, near the Illinois River Valley, from late in the evening of the 17th through the late afternoon of the 18th. A quarter to half inch of ice resulted in numerous reports of downed power lines and tree limbs, extended power outages and traffic accidents. One accident in Woodford County, attributed to an icy road, resulted in one serious injury.
- A winter storm produced a variety of weather across the area. Areas along and north of I-74 saw 3 to 5 inches of snow, while an extensive mixture of freezing rain and sleet changed over to snow further south. Ice accumulations were around a quarter inch along the I-72 corridor and east to Danville. During the late afternoon, snow rollers formed as wet snow accumulated on the icy ground, then were blown into log-shaped "snowballs".
- A winter storm produced 3 to 5 inches of snow along and north of the I-74 corridor. Further south, freezing rain accumulated to around a quarter inch thick along I-72 east to Danville, before changing to sleet and snow. Later in the day, snow rollers developed from wet snow accumulating on the icy ground, blown into shape by 15-25 mph winds.
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