* WHAT...Heavy mixed precipitation. Additional snow and sleet accumulations between 3 and 5 inches and ice accumulations up to one tenth of an inch. Winds gusting as high as 35 mph will cause blowing snow.

* WHERE...Portions of south central and southwest Illinois and central and east central Missouri.

* WHEN...Until 6 AM CST Monday.

* IMPACTS...Visibilities may drop below 1/4 mile due to falling and blowing snow. Travel could be very difficult. The hazardous conditions could impact the Monday morning commute.