Monthly Summary 



March, 1930 



Barometer 



(Readings reduced to sea level) 



Maximum 30.43, 15th 



Minimum 29.00, 8th 



Mean semi-daily 29.762 



Range 1.43 



Air Tempera<ure 



Highest 56.0, 13th 



Lowest 14.0, 3rd 



Mean 35.0 



Monthly range 42.0 



Highest mean daily 44.0, 13th 



Lowest mean daily 19.0, 3rd 



Mean maximum 43.3 



Mean minimum 26.8 



Greatest daily range 30.0, 24th 



Least daily range 4.0, 18th, 25th 



Precipitation 



Precipitation. In inches 3.95 



Snow, in inches Trace 



Maximum precipitation in 24 hrs. 1.09, 



25th, 26th. 

 Number of days on which .01 or 



more inches of rain fell 10 



Wind (miles) 



Total movement 6,828 



Greatest daily movement 475, 14th 



L^ast daily movement 72, 17th 



Mean hourly velocity 9.0 I 



Maximum velocity for 5 min .... 30, 13th 



vCiirrected to conform to 3 cup anemometer) 

 Wind (direction) 



Prevailing direction wsw 



North, days 1 



Northeast, days 



East, days 2 



Southeast, days 4 



South, days 5 



Southwest, days 3 



West, days 11 



Northwest, days 5 



Weather 



Mean relative humidity, per cent. . 61.6 



Mean cloudiness, per cent 48 



Number of clear days 16 



Number of fair days 9 



Number of cloudy days 6 



Number of hours bright sunshine 236.1 

 Percent of possible hours of bright 



sunshine 63.6 



Thunder and lightning 25th 



Normal 



Extremes 



30.60 



29.26 



30.02 



1.35 



63.9 



5.7 

 34.2 



58.2 



3.68 

 8.11 



11 



7.7 

 29 



75.0 

 51.0 

 11 

 9 

 11 

 201 



54.4 



30.96, 1904 

 28.47, 1914 



2.10, 1914 ; 0.85, 1915 



79.5, 1907, 1921 

 -7.5, 1906 



7.13, 1899; 0.12, 1915 

 27, 1899; 0, 1921 



17, 1890, 1913; 3, 1915 



5,738 ! '7.485, 1911 ; 3,006, 1905 



39, 1913 



86.8, 1916; 63.7, 1891 



68, 1901 ; 27, 1915 



22, 1924 ; 3, 1901 



17, 1900; 4, 1895 



21, 1901 ; 1, 1915 



292, 1924 ; 93, 1901 



XoTK— The lirst column in the above summary gives observations made during the 

 month. The second and third columns give the averages and extremes observed from i8Sq 

 to 1929. 



