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 Friday, July 25, the 206th day of 2014. There are 159 days left in the year.
1864 -- 150 years ago: Walter Jones, of Co, F 23rd Ky, volunteers, lost a satchel on the Camden road, yesterday, containing his papers of discharge from the army. 1889 -- 125 years ago: E. W. Robinson purchased from Mrs. J.T. Miller the livery stable on the triangle south of Market square. 1914 -- 100 years ago: A municipal; bathing beach was advocated at the weekly meeting of the city commission by commissioner Rudgren, who suggested the foot of Seventh Street as an excellent location. 1939 -- 75 years ago: Floyd Shetter, Rock Island county superintendent schools, announced teachers hired for nearly all of the 95 rural and village grade schools in the county. 1964 -- 50 years ago: The mercury officially reached the season's previous high of 95 about noon today and continued upward toward an expected mark of 97. 1989 -- 25 years ago: Fort Armstrong hotel once the wining and dining chambers of Rock Island's elite is under repair. Progress is being made though at a seeming snail's pace to return the building to a semblance of its past glory for senior citizen's homes.