381 METEOROLOGICAL CONDITIONS ALONG AIRWAYS but also have higher velocities than do north component 'winds. Thus, at 3,300 feet, S. to WSW. winds of 22 M. P. H. or more occur 26 per cent of the time or on about one day in four … < ki < S) kl to "} i to > ^ 3 Wind direction Wind direction Fig. 7.—Average nnnnnT frequency of winds of 22. and 33 M. P. H. Fig. 8.—Average annual frequency of winds of 22 and 33 M. P. H. and over at 1,600 feet, classified by direction and over at 3,300 feet, classified by direction throughout the…
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