It's still snow here and tonight the light rain has turned the street into a skating rink. I'm not driving on that. There are signs of melting so maybe, soon, life can get back to normal.
So I've been browsing and I keep coming up against the question 'can it be too cold to snow?'
The obvious answer is - if it could, there'd be no snow in the Arctic or the Antarctic. So it can't. And yet the pseudoeducated keep coming up with 'Yes it can'. Their argument is that at sub-zero temperatures, the air cannot hold enough moisture to produce any precipitation.
It's partly true, and that's why it rains/snows. The argument requires a static system and we don't have one. Air moves about. The technical term for this is 'wind'. In warmer regions, air picks up moisture. When moisture-laden air moves into colder regions, the moisture drops out. Depending on the temperature of the colder region, it could drop out as clouds, rain, snow or hail. Warm and cold are relative terms so the moisture content of air at zero degrees will drop out if the air cools to negative degrees. All that matters is the difference in temperature, not the absolute temperature itself.
So the argument that cold air can't hold moisture is not a justification of the 'too cold to snow' myth. It's an explanation of why snow (and rain) happens at all. Warm wet air comes into a colder region and the moisture it contains precipitates. That's how come it can snow in Antarctica at temperatures in double figures below zero.
It cannot be too cold to snow. It all depends on whether incoming air was warmer before it arrived.
The other thing I found was centrifugal force, which I was told at school was a myth.