Snowy conditions close South Carolina Waffle House

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TRAVELERS REST, S.C. — Snowy conditions forced a South Carolina Waffle House to close Sunday.

The restaurant in Travelers Rest was locked with no indication of when it would reopen, WHNS reported.

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With more than 1,500 restaurant locations across the Southeast that are typically open 24 hours every day of the year, a closure is a big deal, so much so that federal emergency management officials informally determine how bad a storm is based on what is referred to as the Waffle House Index.

Upstate areas of South Carolina were expected to receive more than a foot of snow throughout the weekend, according to the National Weather Service.

"If a Waffle House store is open and offering a full menu, the index is green. If it is open but serving from a limited menu, it's yellow. When the location has been forced to close, the index is red. Because Waffle House is well-prepared for disasters … it's rare for the index to hit red," according to the Federal Emergency Management Agency.