A wind chill advisory was issued for parts of the Chicago area Saturday as "dangerously" cold temperatures send values as low as -30 degrees.
The advisory was issued for LaSalle, Kendall, Grundy and Livingston counties in Illinois, as well as Lake county in Indiana. It began at 6 p.m. Saturday and continues through noon Sunday.
The advisory warns of wind chill values at 20 or 30 degrees below zero, with some location possible reaching as low as -35. It warns of the potential for frost bite on exposed skin in "as little as 30 minutes."
For the following counties, a wind chill warning remains in effect: Winnebago, Boone, McHenry, Ogle, Lee and Kane.
A Winter Weather Advisory went into effect at 6 p.m. Friday for Porter and La Porte counties in northwest Indiana and Berrien county in southwest Michigan and runs through 6 p.m. Saturday.
The bitter cold could be felt Saturday morning with highs in the single digits and wind chill readings between -5 and -15 degrees, only set to reach the mid teens by the afternoon hours.
High temperatures could range near 10 degrees in northwest counties to 18 degrees in northwest Indiana, but winds will keep the reading below 0.
Again on Saturday night, bitter cold sends temperatures down to -10 degrees inland to near zero in Chicago with wind chill readings between -10 and -25 degrees.
That frigid air carries into Valentine's Day with highs in the single digits and wind chill readings between -15 and -25 degrees.
Monday looks mostly cloudy, breezy and still quite cold. A few lake-effect snow showers will be possible during the day, but a steadier snow is possible by the evening. Highs hover between 10 and 15 degrees with below-zero wind chills.