Radar as of 3:35p.m. showing light snow moving across the area.

Going forecast looks good so far. An area of light snow is moving southeast through southern IL as we speak. This light snow has the potential to make untreated roads slick so be cautious on the roadways. We can expect to see a dusting to one-half inch from this as it moves through. 

Overnight tonight we should expect to see temperatures fall and clearing skies as a surface ridge slides into the area. I expect temperatures to dip as low 8F along I-70 to the middle teens in far southern IL near Paducah. Highs on Monday will only rebound into the lower-middle 30s across the region. Areas south of I-64 should remain dry overnight Monday but areas north of there have the potential to see another shot of wintry precipitation from another shortwave traversing the region. Impacts from that should be minimal as most of the precipitation should remain north of I-72 but I wouldn’t be surprised to see some wintry precipitation fall between I-72/I-70. 

Euro depiction of wintry mix for southern IL Tuesday night into Wednesday.
GFS depiction of wintry mix for southern IL Tuesday night into Wednesday.
NAM depiction of wintry mix for southern IL Tuesday night into Wednesday.

Focus then turns towards yet another system progged to move through southern IL on Tuesday/Tuesday night. Highs on Tuesday will hover near freezing for locations near I-70 to the close to 40 farther south towards Paducah. Areas north of I-64 should see all (or at least majority) snow for the entirety of the evening beginning Tuesday afternoon (we’ll have start times in a future update once we get that pinned down). It currently looks like we have the potential to see 1-2″ of snowfall (locally higher amounts) for areas between I-70 and I-64. I’m a little concerned with the potential for freezing rain south of I-64. With that being said, it looks like 1/10″ or less of ice accumulation will transpire. 

It’s IMPORTANT to note that these are just preliminary numbers and the forecast locations and amounts of this will be adjusted/fine tuned as Tuesday approaches. Guidance still hasn’t settled on placement of wintry precipitation nor the amounts but we do have a general idea of where we expect it to fall.