Ice jam in Allagash, Maine. (Screengrab photo from Tylor Kellys Camps Allagash Maine Facebook video)

Ice jam in Allagash, Maine. (Screengrab photo from Tylor Kellys Camps Allagash Maine Facebook video)

Residents of Allagash, Maine are reportedly on alert as a massive 3- to 4-mile long ice jam has formed along the St. John River, according to an article on BangorDailyNews.com.

Residents are reportedly keeping a close eye on the ice jam as they expect it to start running Thursday or Friday. The National Weather Service has issued a flood warning for the region.

Read about a massive ice jam along the St. John River in Allagash, Maine.