Ice jam issues are beginning to rear their ugly head on waterways. Here's a look a the Allegheny River at Parker. Ice jammed downstream is causing the river to rise quickly which can't be forecast. Images are 10 minutes apart. #PAWX @ReadyPA @NWSPittsburgh pic.twitter.com/HCBza7tTFP

— Jeff Jumper PEMA (@JeffJumperWX) January 12, 2018