Local winds experienced in mountain areas on a daily basis during clear weather. They are due to the different amount of heat received by or lost by the mountains and valleys. Mountain winds blow down to the valleys at night, valley winds blow up the valleys towards mountains during the day.
MOUNTAIN AND VALLEY WINDS
Meaning of MOUNTAIN AND VALLEY WINDS in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012