MONTHLY SUMMARY 



May 1946 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum -. _____.30.41, 14th 



M inimum .__....- 29.62, 8th 



Mean semi-daily ... - 29.969 



Range . - - 0.79 



Air Temperature, in degrees F. 



Highest 86, 2Sth 



Lowest . — 30, 3rd 



Mean 55.8 



Range - -56 



Highest mean daily 70.5, 25th 



Lowest mean daily _„ 43.5 3rd 



Mean maximum 67.7 



Mean minimum ?r-?r-v ^"^-^ 



Greatest daily range \^.'Si..-L.::. 42, 30th 



Least daily range ..-_:.... 8, 28th 



Precipitation, in inches 



Precipitation 5.41 



Snow — 



Maximum precip. in 24 hrs. 1.47, 27th 



Number of days with .01 or more 15 



Wind, in miles 



Total movement - 4471 



Greatest daily movement 252, 28th 



Least daily movement 72, 20th 



Mean hourly velocity 6.0 



Maximum velocity 32, 6th, 9th 



Wind, direction 



Prevailing direction ....: : W 



North, days ^ 3 



Northeast, days 1 



East, days — — : ...—•. 



Southeast, days _. ^ . 9 



South, days 1 



Southwest, days .- 3 



West, days _ —6 



Northwest, days ...-..:-.......: '.'. .8 



Weather 



Mean relative humidity, percent 54.8 



Mean cloudiness, percent — 55 



Number of clear days - 12 



Number of fair days 10 



Number of cloudy days . 9 



Number of hours bright sunshine — 254 



Percent of possible hours of 



bright sunshine ^ 56.1 



Thunder and lightning .-. — 



Normal 



30.39 



29.51 



29.96 



0.88 



86.1 

 31.2 

 57.1 

 54.9 



Extremes 



3.60 

 12 



4504 



6.1 



28.8 



W 



60.7 



52.1 



11 



11 



9 



252 



55.6 



30.62. 1936 

 29.10, 1938 



94.5, 1896, 1911 

 24.0, 1900 



7.44, 1931; .48, 1903 



20, 1901, 1945; 5, 1903 



5946, 1907; 2180, 1894 



45, 1935 



70, 1901, 1902; 30. 1923 



21, 1944; 0, 1927 



17, 1907, 1926; 5. 1923 



20. 1927; 2, 1941 



350, 1944; 137, 1927 



Note — The first column in the above summary gives observations made during 

 the month. The second column gives the averages based on observations made 

 from 1889 to 1938, except that humidity records are based on observations made 

 from 1929 to 1938. The third column gives extremes observed from 1889 to 1945. 



