When a very cold air mass covers half of the United States, a very warm air mass often covers the other half. Explain how this happens.?
What will be the ideal response?
ANSWER: When a very cold air mass moves out of Canada into the United States the flow aloft is meridional and the upper-level pattern is wavy. Hence, the northerly winds aloft direct a cold air mass into one part of the United States while, at the same time, the southerly winds aloft direct a warm air mass into another portion of the United States.?
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