Wind 



Wind velocities averaged by weeks varied over the 5 years from a low of 2.8 m.p.h. 

 to a high of 10.0 m.p.h. Weekly averages usually remained in the 4.5 to 6.5 m.p.h. 

 range (fig. 9). The only discernible trend was an apparent increase in velocity during 

 October each year. 



The southwest exposures were somewhat more windy than the northeast. Velocity 

 differences between exposures averaged 0.3 m.p.h. (a = 0.9) at the lower elevation and 

 1.0 m.p.h. (a = 1.0) at the upper elevation. Greater wind velocity on the southwest 

 exposures may reflect the prevalence of convectional summer storms from the west. 

 Stations on the southwest slope were more directly exposed to these storms than stations 

 on the northeast. 



Elevational differences in wind velocity were slightly greater than those of expo- 

 sure. The stations at 8,200 feet received 1.4 m.p.h. (a = 1.0) more wind on southwest 

 exposures and 0.7 m.p.h. (a = 0.8) more wind on northeast exposures than did the sta- 

 tions at 7,100 feet. 



18 20 22 24 26 28 30 32 34 36 38 40 42 44 



WEEK 



Figure 9. — Wind velocity at the station on the southwest exposure at 7^100 feet 

 elevation: 5-year average of weekly means and range of weekly means. 



18 



