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In meteorology, prevailing wind in a region of the Earth's surface is a surface wind that blows predominantly from a particular direction. The dominant winds are the trends in direction of wind with the highest speed over a particular point on the Earth's surface at any given time.
The westerlies, anti-trades, [2] or prevailing westerlies, are prevailing winds from the west toward the east in the middle latitudes between 30 and 60 degrees latitude. They originate from the high-pressure areas in the horse latitudes (about 30 degrees) and trend towards the poles and steer extratropical cyclones in this general manner. [ 3 ]
The trade winds or easterlies are permanent east-to-west prevailing winds that flow in the Earth's equatorial region. The trade winds blow mainly from the northeast in the Northern Hemisphere and from the southeast in the Southern Hemisphere , strengthening during the winter and when the Arctic oscillation is in its warm phase.
Nor'wester (wind that brings rain to the West Coast, and warm dry winds to the East Coast of New Zealand's South Island, caused by the moist prevailing winds being uplifted over the Southern Alps, often accompanied by a distinctive arched cloud pattern)
Four charts of the wind, 18th-century illustration based on medieval wind roses. The Tower of the Winds in Athens, of about 50 BC is in effect a physical wind rose, as an octagonal tower with eight large reliefs of the winds near the top. It was designed by Andronicus of Cyrrhus, who seems to have written a
The winds that flow to the west (from the east, easterly wind) at the ground level in the Hadley cell are called the trade winds. Though the Hadley cell is described as located at the equator, it shifts northerly (to higher latitudes) in June and July and southerly (toward lower latitudes) in December and January, as a result of the Sun's ...
During the summer months, the average wind pattern implies a surface ridge axis which normally lies across central Florida, with easterly winds from Tampa southward and southwest winds across northern Florida. The peak wind gust during the 1930 through 1997 period was 115 miles per hour at Miami International Airport during Hurricane Andrew. [5]
The prevailing winds are seasonal in coastal Sydney; northeasterly sea breezes arriving in the summer provide relief on hot days; in winter and early spring, generally strong and cool winds come from the west or north-west, which are related to large scale synoptic events. [120] Summer winds from the south may be strong (i.e. southerly buster).