The Allegheny River is poised to see its largest river ice jam in almost 20 years, according to the National Weather Service.
“The last time we had a major ice event was January 1996,” said Lee Hendricks, a meteorologist at the National Weather Service in Moon. “There was a lot of ice, primarily on the Allegheny River, and a decent snowpack.” A snowpack forms when snow from the surrounding countryside melts and runs into creeks, rivers and lakes.
“Rain covered the top (of the ice) and we had decently high temperatures,” he said. “It caused the ice to break loose and caused a lot of problems, including flooding in a lot of locations and river navigation headaches.”
Hendricks said the region’s extremely cold temperatures won’t break for at least another 10 days, so conditions will be ideal for the same situation to occur.