A strong cold front enters the region Monday night into Tuesday bring snow chances to the forecast for Tuesday.
Some isolated showers have been occurring in some areas across Central Illinois. Showers will begin to dissipate later this evening. Tonight, expect a few passing clouds but mainly clear skies with lows in the lower 40s.
Temperatures stick in the upper 50s, low 60s to start the work week. But a pattern change begins Monday night into Tuesday as a frontal system will passes through the area Monday night, and dips southeastward by Tuesday. This will bring showers to parts of the region, mainly north of I-72 Monday evening. Showers will begin to increase and spread across the region heading into Tuesday. Low temperatures Tuesday morning will cool down to the mid to upper 30s, which will cause precipitation to come down as a rain and snow mixture, and at times, just snow. Daytime highs Tuesday will be significantly cooler than the past few days, only reaching the lower 40s, with some areas seeing the upper 30s. Most of the precipitation will come down as a mixture of rain and snow in the afternoon. But, temperatures begin to lower heading into Tuesday evening, causing the mixture to switch to wet snow. Precipitation will come to end by Tuesday night.
Though the forecast brings snowfall to the area, warm ground temperatures will limit any major snow accumulations--meaning, any snow accumulations will be minor, up to an inch (with some areas more further Northwest, up to 2 inches), and will mainly accumulate on grassy surfaces. Areas from I-74 north and west of the IL river could see up to 1 inch of snow on grassy and elevated surfaces, with a few spots seeing up to 2 inches. The frontal system will also bring colder temperatures Tuesday and Wednesday night, causing Central Illinois to see widespread frost and a potential freeze.
The most important thing to keep in mind is forecast models can and will undergo changes in the meantime before Tuesday. All in all, be sure to stay tuned for the latest information as the forecast evolves into next week.