Peoria, IL October 23rd, 2017 - A series of storm systems are expected to bring waves of cold temperatures to Central Illinois through early next week that could send overnight temperatures below freezing by this weekend.
This past weekend the jet stream dropped south across the Midwest sending rain showers and colder temperatures in to Central Illinois. Another frontal system will bring even colder temperatures to Central Illinois for the weekend that could send the mercury below the freezing mark.
What to Expect
Some areas may see temperatures drop near to slightly below freezing Tuesday night and Wednesday morning as our latest storm system moves out of the region. As the blanket of cloud cover begins to clear out, radiational cooling will allow temperatures to fall in to the low to mid-30s. It looks like most areas will see temperatures remain a few degrees above the freezing mark, frost may develop across the region especially if wind speeds are able to become light.
A more widespread freeze looks to develop across Central Illinois this weekend behind a cold front that will bring colder temperatures to the region Thursday afternoon. The cold air will continue to drop south in to the region on Friday and Saturday. Daytime temperatures are expected to be in the 40s while overnight temperatures drop slightly below freezing. Depending on the timing of another wave of cold air moving in on Saturday, a deeper freeze will be possible Saturday night.
While many folks may not be ready for the return of colder temperatures, this year's first freeze is already later than average, which is October 13th for Peoria. If the forecast is correct, it won't be the latest first freeze on record, that happened last year on November 12th.
While temperatures will certainly be cold enough to support snow, the chance of precipitation across Central Illinois looks very low. There will be some waves of energy that may trigger a few spotty showers, that if they were to develop at night, may fall as snow. For now, the chance of snow is low and looks higher across parts of Indiana and northeast Illinois.
So, make sure to dig out the warm clothes and winterize your homes and your cars as it looks like our first round of freezing temperatures will be moving in by the end of this week.