Mr. lee's expository writing class (kayak1)

Race #48589

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Official speed 106.45 wpm (45.43 seconds elapsed during race)
Race Start April 21, 2017 3:17:35am UTC
Race Finish April 21, 2017 3:18:20am UTC
Outcome No win (2 of 2)
Opponents 1. jbb817 (118.95 wpm)
Accuracy 93.0%
Points 0.00
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.