PART V — SEVERE STORMS 



Figure V-8 — CONTOUR-MAPPED PPI DISPLAY 



The figure shows the PPI-scope of the 10-centimeter WSR-57 radar at the National 

 Severe Storms Laboratory in Norman, Oklahoma on April 26, 1968. Differences in 

 shading indicate intervals of a factor of 10 in received echo power. From such an 

 electronic display it is possible to determine the most dense part of a storm. Range 

 marks are at intervals of 20 nautical miles. North is at the top of the figure. 



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