A "sun dog" atmospheric phenomenon appears as the sun shines over a solitary tree in a corn field covered in snow, in southern Minnesota, January 27, 2014. Chicago, Minneapolis and other parts of the ... more 
A "sun dog" atmospheric phenomenon appears as the sun shines over a solitary tree in a corn field covered in snow, in southern Minnesota, January 27, 2014. Chicago, Minneapolis and other parts of the Upper Midwest will have two consecutive days of subzero highs on Monday through Tuesday, according to forecasters. Highs will be held to the single digits and teens Tuesday and Wednesday across most of the Northeast, according to Accuweather.com. Officials closed schools in Chicago, Cincinnati and the Cleveland area on Monday due to the biting cold, and most districts were closed across Minnesota. The halo around the sun is caused by the refraction of sunlight by small ice crystal in the atmosphere. REUTERS/Eric Miller (UNITED STATES - Tags: ENVIRONMENT) less 
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Reuters | Photo By ERIC MILLER / REUTERS
Mon, Jan 27, 2014 4:56 PM EST