"Jim Macklin" wrote in message
newsUdXg.2525$XX2.933@dukeread04...
I seem to remember that Rapid City, SD had a 60 degree
temperature swing several times on one day. The explanation
was that the front moved around the mountain and they got
hat and cold passage several times.

Had something similar in OKC about 10 years ago. IIRC, it was on November
11th that it hit a record high temperature for the day (in the 80's?) then
the temperature dropped quickly and broke the low record for the same day
(in the 20's?) and snowed!