____ is a region where the atmospheric pressure is lower than the surrounding areas. ____ is a region where the atmospheric pressure at the surface is greater than its surrounding areas. ____ is a cool and dry wind from Siberia carrying cold weather condition and could bring rains over the eastern section of the country. A warm, moist air of the ____ bring heavy rains to most of the western part of the country from June to September. ____ is a migratory wave-like disturbance of the tropical easterlies. It is a wave along a broad easterly current and moves from east to west.

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