26 



VISIBILITY - 7,8 $9 - WWITEL. 

 VISIBII-ITY - 5 t6 = CROSS WATCHED. 

 V I SI Bit- IT V - 0. 1.2.3 4.4 - BLACK. 



WEATHER DIAGRAM 



APRIL \930. 



Figure 13. — April weather diagram. For explanation of symbols, see FigurelU 



