MONTHLY SUMMARY 



February, 1947 



Barometer, in inches 



(Readings reduced to sea level) 

 Maximum __ 30.44, 12th 



Minimum 29.15, 22nd 



Mean semi-dailv 29.729 



Range ." _ 1.29 



Air Temperature, in degrees F. 



Higliest _ 5U, 4tli 



Lowest _.._4, 9th, 20th 



.Mean ..._ ...__ 24.0 



Range - — ._ 26 



Higliest mean daily 37, 16th 



Lowest mean daily 12.5, 21st 



Mean maximum __. _ 32.1 



Mean minimum 15.8 



Greatest daily range 31, 4th 



Least daily range - 6, 27th 



Precipitation, in inches 



Precipitation 1.96 



Snow .,-,- -_. 18.0 



Maximum precip. in 24 hrs. 0.75, 4th 



Number of days with .01 or more 6 



Wind, in miles 



Total movement . 5862 



(ireatesf daily movement 435, 17th 



Least daily movement - 15, 7th 



Mean hourly velocity . . 8.7 



Maximum velocity 32, 9th, 10th 



Wind, direction 



Prevailing direction WNW 



North, days -. 2 



Northeast, days _ ..0 



East, days , 



Southeast, days 1 



South, days 4 



Southwest, days — 1 



West, days 3 



Northwest, days _. 17 



Weather 



Mean relative humidity, percent 58.9 



Mean cloudiness, i)ercent .._ ..58 



Number of clear days 8 



Number of fair days 9 



Number of cloudy days 11 



Number of hours of bright sunshine 144 



Percent of i^ossible hours of bright 



sunshine . 48.6 



Thunder anrl lightning 4th 



Normal 



30.63 



29.24 



30.04 



1.38 



50.5 

 -7.4 

 23.7 

 58 



32.8 

 14.5 



3.19 

 13.99 



10 

 4776 



7.1 

 31.7 



WNW 



66.6 

 50.9 

 10 



8 



10 



158 



53.4 



Extremes 



31.05, 1920 

 28.56, 1895 



1.89, '00, '08; .88, "13, '31 



65.0. 1930 

 -23, 1943 



8.12, 1900; 0.62, 1901 

 48.75, 1893; 0.50, 1937 



15, '93, '20; 4, 1901 



6445, 1896; 3438, 1892 



50, 1946 



66, '90, '27; 31, 1905 



19, 1941 ; 2. 1927 



16. 1920; 2, 1930 



16, 1894; 2, 1920 



221, 1924; 110, '27, '38 



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 19.38, except that humidity records are based on observations mnde 

 from 1929 to 1938. The third column yives extremes observed fr^m 1889 tci 1946. 



