They occur from July to September, when changing airstreams draw moisture-laden currents from Mexico tot he dry Southwest. |
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On the strip between the ocean and coastal mountains, offshore winds carry moisture-laden air which is dumped onto the land. |
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In the southern hemisphere it is the meeting place of the dry east to southeast winds generated by the subtropical highs, and the moisture-laden northwesterly monsoon winds. |
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Ice storms occur when warm, moisture-laden air slides over a layer of extremely cold air, and rain falls onto freezing ground. |
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