Wind speed ( 23 to 27 knots ) f f 



Cloud type (Dense cirrus 

 Itches) 



True direction from whict) 



wind is blowing ^^ 



Current oir temperoture 



(31° F) jj 



Total onnount of cloud 



( Completely covered ) |^ 



Visibility in miles and 



froction (3/4 mile) VV-»-^^^ 



Present weottier. 



Continuous ligtit snow WW 



Temperature of dew 



point ( 30° F) T(J 



Cloud type ( Froctocumulus) C 



Height at base of cloud 



(2 = 300 to 599 feet) ^ 



'' sky covered I 

 iddle cloud 

 (6 = 7 or 8 tenths) 



NOTE : The letter symbols for eoch weather 

 element ore shown above. 



Courtesy 

 abridged 



Cloud type (Altostrotus) 



Barometric pressure in 

 tenths of millibars reduced 

 to sea level. Initial 9or 10 

 and the decimal point ore 

 ppp omitted (247= 1024.7 mb) 



Pressure change in 3 hours 

 proceeding observotion 

 _(28 : 2.8mb) 



Characteristic of barograph 

 trace (Foiling or steody, 

 then rising, or rising, then 

 _rising more quickly) 



Plus or minus sign showing 



whether pressure is higher 



_or lower then 3 hours ago 



Time precipitation begon 

 _or ended (4 = 3104 hrs.ogo) 



yu Post weather (Rain) 



Amount of precipitation 

 pp (45= 0.45 inches) 



United Stotes Weather Bureau 

 from W.M.O. Code 



Figure 3-10. Sample Plotted Report 



3-25 



