It may not be extraterrestrial activity, but a permanent imprint on the central Illinois Doppler radar even has the National Weather Service stumped.

A mysterious "beam of interference" has been etched into the Lincoln Doppler radar since Nov. 16, according to a bulletin on the National Weather Service's website. The rogue beam extends westward from Lincoln through the middle of Mason County, near Manito, the bottom of Fulton County and onward into the state of Iowa.

"We're not sure what it is yet," said Llyle Barker, a meteorologist in the weather service's Lincoln office. "4G has caused interference before, so it might be a 4G tower."

Or, it might be something else. ;-) To read more, click here.