Sam (reason650)

Race #2803

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Official speed 49.94 wpm (96.84 seconds elapsed during race)
Race Start December 14, 2017 3:58:44am UTC
Race Finish December 14, 2017 4:00:21am UTC
Outcome No win (4 of 5)
Accuracy 94.0%
Points 54.10
Text #3622192 (Length: 403 characters)

Valley (or graben) breezes and mountain breezes are a very localized phenomenon. They relate directly to daily temperature variations between summits and bases. Since it is in the highest reaches that the maximum diurnal range is attained, it is the summits which drive the mechanism. Nights in the mountains are colder than those in the valleys below, especially if moist air collects in those valleys.