WEATHER 39 



Table 5-1. --Intensity of rain 



Slight Individual drops are easily identifiable; spray over 



hard surfaces is slight; pools form very slowly; 

 over 2 minutes may be required to wet decks and 

 similar dry surfaces. 



Moderate . . Individual drops are not clearly identifiable; some 

 spray over hard surfaces; pools form rapidly. 



Heavy Rain seemingly in sheets; individual drops are not 



identifiable; heavy spray to height of several inches 

 is observable over hard surfaces; visibility is 

 greatly reduced. 



Table 5-2. --Intensity of snow 



Slight Visibility 1, 100 yards (1,000 meters) or more. 



Moderate . . Visibility less than 1, 100 yards (1,000 meters), but 

 not less than 550 yards (500 meters). 



Heavy Visibility less than 550 yards (500 meters). 



5340. TYPES OF PRECIPITATION. Precipitation comprises liquid, 

 freezing, and frozen types. These types are described below. 



5341. Liquid Precipitation. Liquid precipitation is classified as drizzle 

 or rain as follows: 



5341.1. Drizzle, Very small and uniformly dispersed droplets that ap- 

 pear to float in the air and to follow very light air currents. Drizzle usually 

 falls from low stratus clouds and is frequently accompanied by low visibility 

 and fog. 



5341.2. Rain. Falling drops of liquid water that are larger than those 

 in drizzle. Rain, as used in this manual, does not include drizzle and 

 freezing rain. 



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