Yesterday, we flew from Regina to Edmonton.  Very strong headwinds all the way.  And it was Warm!. It was +7C in Edmonton, in February, with winds from the northwest.  Ice and snow melting everywhere!  With NW winds?  How does that work?

See: https://en.wikipedia.org/wiki/Chinook_wind

Here is a short video to give you a feel for the inside of the airplane: