(11:45PM – Monday, February 17th, 2025) Monday night update on a storm system passing well to the south of the state that will bring a period of snow to portions of Central and all of Southern Illinois, from Tuesday morning through Wednesday morning. Several inches of accumulating snow will be likely across affected areas.
Timing…
•Tuesday Morning – Wednesday Morning, February 18-19th.
Location…
•Central & Southern Illinois.
Impacts…
•Snowfall accumulation ranging from a trace to 1″ to upwards of 4-7″ will be likely across portions of Central and all of Southern Illinois, with locally higher amounts possible near the IL/MO border.
•Periods of moderate to heavy snow will be likely, especially between later Tuesday afternoon and late Tuesday night.
•Snowfall accumulation will lead to travel issues across affected areas.
Update…
•With this update, little to no changes were needed, as the going forecast is on track.
Discussion…
•A storm system passing well to the south of the state will bring a period of snow to portions of Central and all of Southern Illinois, from Tuesday morning through Wednesday morning. With cold air established in the region and across the state, this will be an all snow affair for affected areas. Forecast soundings show temperatures deep within the column either within or on the border of the DGZ, signaling the potential for above average (10:1) snowfall ratios. Banding to the snowfall will be possible, especially across Southern Illinois. Snow will be moderate to heavy at times as well.
