The National Weather Service warned an extra two to three feet (60 to 90 centimetres) of "lake effect snow," created when frigid air moves over warm lake waters, could fall.
It said visibility was near zero and that thunder and lightning were likely to accompany the heaviest snow as a state of emergency and travel bans remained in place in western New York state.
The colossal snowfall has collapsed roofs, damaged homes and businesses, cancelled flights and stranded motorists for as many as two nights on the highway, including New York rock group Interpol.
The death toll from "Winter Storm Knife" rose to 10 when two people died of exposure in Niagara County and Boston town in Erie County, officials told AFP.
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Four or five others died earlier in the storm while working to clear mounds of heavy snow from their cars and homes, and the blizzard could yet prompt a federal disaster declaration.
The state of emergency is so severe that the NFL announced that the football game between the local Buffalo Bills and the New York Jets would not be played on Sunday in Buffalo.
"Very dangerous storm. One more day. Let's get through this snow. People - continue to be smart. Stay at home. Observe the driving bans," deputy Erie County executive Richard Tobe said.
The rock band Interpol said they were stranded more than 50 hours on their tour bus by the storm outside Buffalo, forcing them to cancel two consecutive nights of concerts in Montreal and Toronto.
"Finally just started making a move. 50+ hours later. Hoping for some luck today," the band tweeted yesterday morning.
"It is a little bit scary, especially given that no one can really drive. So if you need help, it's a little tough," she told AFP.