I had friends tbat li ed on Badger Rd in North Pole, a notorious cold spot. It was not unusual for them to be able to drop down to the Chena River behind their house and it be 20 degrees colder than the house thermometer. Vertical difference of perhaps 15'.
I lived off of Badger (Lakloey Dr) and you're exactly right, we lived at the bottom of the hill and it could be as much as 15 degrees warmer on top. We saw -30 to -40 quite a few times when we lived there.
