Feeling cold? Blame the albedo


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Originally Posted Online: Jan. 31, 2013, 8:14 pm
Last Updated: Feb. 01, 2013, 9:40 am
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By Kevin Smith, ksmith@qconline.com

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.














 




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  Today is Monday, Sept. 1, the 244th day of 2014. There are 121 days left in the year.

1864 -- 150 years ago: We are informed by J.H. Hull that the reason the street sprinkler was not at work yesterday settling the dust on the streets, was because one of his horses was injured.
1889 -- 125 years ago: Bonnie McGregor, a fleet-footed stallion owned by S.W. Wheelock of this community, covered himself with glory at Lexington, Ky, when he ran a mile in 2:13 1/2. The horse's value was estimated as at least $50,000.
1914 -- 100 years ago: Troops are pouring into Paris to prepare for defense of the city. The German army is reported to be only 60 miles from the capital of France.
1939 -- 75 years ago: The German army has invaded Poland in undeclared warfare. Poland has appealed to Great Britain and France for aid.
1964 -- 50 years ago: Publication of a plant newspaper, the Farmall Works News, has been launched at the Rock Island IHC factory and replaces a managerial newsletter.
1989 -- 25 years ago: Officials predict Monday's Rock Island Labor Parade will be the biggest and best ever. Last minute work continues on floats and costumes for the parade, which steps off a 9:30 a.m.




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