Friday is expected to be this year's coldest day so far, with a wind chill advisory lasting until noon.
Thursday's high temperatures peaked at 18 degrees in the early morning, with area experiencing a steady decrease in temperatures throughout the day, said meteorologist Tim Gross of the National Weather Service.
Overnight temperatures were expected to fall below zero for the first time since Jan. 22, he said. Temperatures may drop to 4 below zero and, fueled by winds of 10 to 20 miles per hour, create a wind chill estimated to be as low as 25 degrees below zero.
Despite mostly sunny skies Friday, temperatures are expected to max out at 13 degrees. This pales in comparison to the record low of 21 degrees below zero set in 1996, yet it remains lower than the average highs of the low 30s for the end of January, Mr. Gross said.
The phenomenon of colder temperatures after a snowfall is commonly attributed to snow's high "albedo," the intensity at which something reflects light and radiation from the sun, Mr. Gross explained. This radiation is "bounced" back into the atmosphere rather than warming the earth, he added.
Once the snow melts sometime next week, temperatures are expected to return to normal, the meteorologist said.
Today is Monday, April 21, the 111th day of 2014. There are 254 days left in the year.
1864 -- 150 years ago: The female sex seems to have gone crazy on the subject of dry goods. When high prices keep them from increasing their wardrobes, they turn to stealing. Yard goods, hats, shoes and other items are being picked up and carried home. 1889 -- 125 years ago: Members of Everts Commandery No. 18, Knights Templar, under Commander H.C. Cleaveland, marched from the Masonic Temple to Trinity Episcopal Church for their annual Easter services. 1914 -- 100 years ago: Nate Hultgren pitched the Augustana College baseball team to a 10-3 victory over Carthage, striking out 11 men and allowing only four hits. 1939 -- 75 years ago: Marvel Leonhardi, a Rock Island High School senior, was the winner of an essay contest on advertising sponsored by The Argus and Advertising Age, a national advertising publication. 1964 -- 50 years ago: The Augustana College band drew a crowd of 1,200 people for its annual home concert in Centennial Hall. The size of the crowd was indicative of the fact the band is rapidly approaching the stature of the Augustana Choir. 1989 -- 25 years ago: A benefit to raise money for extracurricular activities in the Rock Island Milan School District will be April 27 at the Quad City Downs harness race track. People buying $17.50 tickets to the second annual "Night at the Quad City Downs" will be entitled to an evening of harness racing and dinner.