Frost Advisory kicks in overnight for parts of Chicagoland

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated.

Saturday-1-6

CHICAGO — A Frost Advisory is in effect for most of the northern half of the Chicago area early Sunday morning.

Near-record low temperatures early Sunday morning will lead to possible widespread patchy frost across at least the portion of the Chicago area north of Interstate-80 early Sunday morning (note blue-shaded area on headlined map above). While not included in the Frost Advisory, patchy frost could also occur in frost-prone locations in Chicago/Cook County and the remainder of the Chicago area south of Interstate-80. Take precautions to protect temperature-sensitive plants tonight.

With clearing skies and exceptionally cold high pressure for this time of the year moving into the Northern Plains, Midwest and western Great Lakes, there is a strong possibility of at least scattered frost across northeast Illinois into northwest Indiana – the more likely area to be hit is north of Interstate-80 to the north and west of Chicago. To understand the unusually cold nature of the air mass moving into our area, Chicago’s record low temperature for May 15 is 35-degrees – set over 120 years ago in 1895. Measured officially at 5 to 6-feet above the ground, in frost-prone areas, temperatures could easily fall into the lower 30s at ground-level.

The widespread impact of the unseasonably cold air mass is depicted on the map below showing the widespread Freeze (purple-shaded areas on the map above calling fro temperatures in the mid to upper 20s) and Frost Advisories (blue-shaded areas) to our west and north.

And a warning for gardeners: you might want to cover up plants, or if possible, bring them inside overnight.

US