These winds are in the middle latitudes and originate from high pressure of horse latitudes.

The prevailing westerlies are the winds of the middle latitudes. They flow outward from the high-pressure belts near the horse latitudes toward lower pressure farther poleward, and Earth’s rotation helps turn them toward the east. The trade winds also originate near the horse latitudes, but they blow toward the equator, so they are not the middle-latitude winds.

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