7.3 7.8 



7.8 7.6 



MAY 



5.8 6.3 



JUNE 



6JZ, 6l7 



5.6 4.4 



JULY 



5.1 58 



7.8 8.5 



6.0 &3 



AUGUST 



7.2 75 



5.4 6l5 



SEPTEMBER 



79 a4 



OCTOBER 



8.5 ^8.2 



8.3, ^9.0 



7.7 &I 



10.3 



8.1 10.8 



NOVEMBER 



10.2 9.1 



DECEMBER 



7.1 7.4 



JANUARY 



Figure 8. --Wind diagrams based on observations from the Green Bay, Wisconsin, Sault Ste. 

 Marie, Michigan, and East Lansing, Michigan, U. S. Weather Bureau Stations 

 May 1955-January 1956, Lines radiating from the center are directions toward 

 which the wind was blowing. Percentage of time is indicated by the length of 

 the line; the radii of the concentric circles are in multiples of 10 percent. 

 Numbers are average velocities in miles per hour. 



18 



