Having just found this thread from another one it has been an interesting read but mostly ignored the original posters question.
He was not talking about Pace's pure snow, he was talking about the stuff we had in UK which, according to all the met reports and forecasts I read was mostly RASN - mixed rain and snow which can (even according to Pace's theories) adhere to the airframe because there is visible moisture.
So for the private pilots out there in UK - do not believe you can go flying in snow (the stuff we get here) and not expect to encounter icing conditions.
One assertion of Pace's which I do think is flawed is that only liquid will freeze - water vapour can sublimate straight to ice as hoar frost or, in fact, in the formation of snow.
I think the point was made to emphasise that ice must melt first before it can re-freeze onto an airframe so yes, a snowflake must melt before it becomes an icing risk but that is what RASN is all about.
Anyway it's nearly Summer
