From the day Truett Cathy started the company, he began applying biblically-based principles to managing his business.

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Truett Cathy opened his first Chick-fil-A outlet in Atlanta's Greenbriar Mall in 1967.

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National Weather Service meteorologist Scott Truett said the heavy "thundersnow" resulted from an unstable air mass, much like a thunderstorm.

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The company, founded by devout Christian S. Truett Cathy, keeps stores closed on Sundays so employees can spend time with their families and go to church.

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Ever since Truett Cathy opened the first Chick-fil-A Restaurant at a mall in suburban Atlanta in 1967, the company has made no secret of its dedication to Christian values.

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"Thundersnow" accompanied the winter storm in parts of Kansas and Missouri, which National Weather Service meteorologist Scott Truett said is the result of an unstable air mass, much like a thunderstorm.

NPR: Winter Storm Blankets Great Plains With Snow

Gay rights groups also are incensed about the chain's financial support for what they say are anti-gay groups, largely through the WinShape Foundation, a group started by Chick-fil-A founder Truett Cathy.

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"Instead of pouring rain, it's pouring snow, " Truett said.

NPR: Winter Storm Blankets Great Plains With Snow