heart attack snow
n.— «With temperatures within striking distance of freezing during much of this precipitation event, the snow which falls is to be heavy and fairly wet—what’s often referred to as “good packing” or “heart attack” snow. The weight of such snow means it must be shoveled with extreme care to avoid a heart attack.» —“Major winter storm on the way” by Tom Skilling WGN Weather Center Blog Feb. 5, 2008. (source: Double-Tongued Dictionary)
Further reading
Samantha Harvey’s novel Orbital is a sensuous, exhilarating meditation about the strangeness of life on a space station, with its mix of tedious tasks and jaw-dropping views. And: a musician who rode the rails in his youth shares the slang he...
Understanding the varieties of conversational styles can mean the difference between feeling you’re understood and being insulted. “High-involvement” speakers interrupt or talk along with someone else to signal their enthusiasm...
Storms like this I have also heard called, in New England, “Widowmakers”