Winter storm watches, warnings, and advisories have been issued for parts of the region due to a late season winter storm which will affect our area tonight and tomorrow. Precipitation will begin as rain and then change over to snow when colder air arrives late tonight. The snow should last through most of the day on Sunday before tapering off to flurries on Sunday night. The highest accumulations are generally expected to be north of I-44 in Missouri and north of I-70 in Illinois. We will continue to refine the forecast with the latest observations and model guidance. (Please visit http://weather.gov/lsx for more information.)