Updated: 7:33 p.m. Monday, Jan. 27, 2014 | Posted: 12:49 p.m. Monday, Jan. 27, 2014

What are these ‘snow rollers’ appearing throughout the area? (PHOTOS)

PITTSBURGH —

Several WPXI-TV Facebook fans have sent us pictures of “snow rollers” that have appeared throughout the area on Monday.

According to Severe Weather Team 11 meteorologist Scott Harbaugh, snow rollers are a rare phenomenon in this part of the country when the wind rolls its own snowballs, much the same way we would roll snowballs to build a snowman.

“They are typically cylindrical in shape and often have a hollow center,” Harbaugh said. “They form under specific conditions when the temperature is near freezing and the snow is wet and loose.”

Harbaugh (@WPXIScott) said wind has to be a perfect speed so it can move the snow rollers along, but not destroy them.

“They are common in areas with a slight slope because gravity can help roll the snow into rollers,” Harbaugh said.

Do you want to share this cool story with your friends? Like WPXI-TV’s official Facebook page and share this post.