My mate was caught in the rain this morning... nothing unusual about that in Glasgow, though there was one minor difference... he was indoors.
He took the subway to work early this morning (Glasgow's famous 'Clockwork Orange' underground rail system), and the air inside the station is warm and humid. However, as trains pull out of certain stations, they drag a column of cold air into the station, and this morning it was -8 deg C. And as one train pulled out of the station this morning, a bloc of freezing air rapidly mixed with the warm, humid air inside the station and it started to rain on the platform.
So there you have it. Glasgow - the city where it even rains indoors.