12 m.n. 4 a.m. 8 a.m. 12 noon 4 p.m. 8 p.m 12 m.n. 



CLOCK TIME, m.s.t. 



Figure 5. — Mass curve of aooumulated peroent of total storms by hour of storm beginning , 

 for precipitation Zone S of the Great Basin Experimental Area. The inset is a 

 schematic showing the distribution of storms by hour. 



12 m.n. 4 a.m. 8 a.m. 12 noon 4 p.fn. 8 p.m 12 m.n. 



CLOCK TIME, m.s.t. 



Figure 6. — Mass curve of accumulated percent of total storms by hour of storm beginning, 

 for precipitation Zone 2 of the Davis County Experimental Vlatershed. The inset is 

 a schematic shewing the distribution of storms by hour. 



17 



