Wed-Thur, Feb 12-13th Snow Event Recap

(12:00PM - 2/14/20) Post event wrap up regarding the recent Wed-Thur, Feb 12-13th snow event that affected the state.

​As expected, a complex setup unfolded across the region...A disturbance across the Southwestern US ejected out into Central US. As this is happened, a disturbance dropped out of Canada, and into the Central US. Both of these disturbances interacted, leading to the development of a storm system, which will moved through the region Wednesday into Thursday. 

​Precipitation initially pushed into Southwest and Southern Illinois Wednesday morning. This activity then steadily spread across the rest of the state through early to mid afternoon Wednesday. This activity then continued from this Wednesday afternoon into Wednesday night, before ending Thursday morning for most areas. Precipitation was all snow across Northern and Central Illinois, though some mixed precipitation occurred along the snow/rain line in portions of Central Illinois. A general light to moderate snow occurred across Northern and Central Illinois for the duration of this event, with brief and scattered periods of heavy snow. Temperatures and snowfall ratios started off on the marginal side Wednesday morning into Wednesday evening, before growing more favorable Wednesday night into Thursday morning, as colder air filtered in. Across Southern Illinois precipitation was predominantly rain, with upwards of 0.50-1.00" of rain, and a few backside snow showers Wednesday night into Thursday.

Final event snowfall totals of 2-5" were widespread across much of Northern and Central Illinois. Snowfall amounts tapered on either side of this main axis, with a very sharp southern gradient across portions of Central Illinois.

​Below is a map representation of final snowfall totals across the state and adjacent areas. ​

​JP

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