"Oh, that'll be a katabatic wind, then" he says as learnedly as an Australian geologist can.
Katabatic? Haven't heard that before.
"Greek" he says "Gravity-feed airflow caused by pressure gradients"
Sounds a bit too glib and very much like a True Story, so I look it up.
Greek it is, a drainage wind it is too and it's frequently found in...?
"Greenland. And Antarctica" he says.
"In Antarctica, you'll have a beautiful day and as the sun goes down, the wind goes from zero to 50 knots in minutes"
I suppose he'd know.
He used to live there....