St. Louis residents are advised to brace for inclement weather as the National Weather Service in St. Louis has issued a Winter Weather Advisory effective from 3 AM to 9 PM CST tomorrow. The region will see mixed precipitation, with expected total snow and sleet accumulations up to four inches and ice accumulations around two-tenths of an inch. According to NWS St. Louis, this wintry mix could result in slippery road conditions, particularly affecting the Wednesday morning and evening commutes.

In addition to the upcoming advisory, Light snow and some sleet have already been impacting parts of southeast Missouri and southwest Illinois. "An additional 1" of snow is possible," states the NWS report. Residents are urged to exercise caution when traveling and stay informed of the changing weather patterns.

Looking ahead, the forecast for the St. Louis area includes a more significant winter storm late tonight and into Wednesday, with widespread wintry precipitation predicted. NWS advisories are in place alerting to the potential hazardous conditions that may affect the larger region, including parts of eastern and central Missouri as well as west central and southwest Illinois. Spotters in these areas are encouraged to report precipitation type and any snowfall totals to the National Weather Service.

On the roadways, the winter storm is expected to pose significant challenges. Travelers are advised to "Slow down and use caution while traveling," with resources available for the latest road conditions in Illinois at www.gettingaroundillinois.com, and in Missouri at traveler.modot.org/map or by calling 1-888-275-6636. With such disruption anticipated, commuters should plan for potentially hazardous travel over the next few day.