MONTHLY SUMMARY 



November, 1947 



Extremes 



Barometer, in inches 



(Readings reduced to sea level) 



Maximum 30.55, 21st, 22nd 



Minimum 29.17, 24th, 25th 



Mean semi-daily 30.056 



Range 1.38 



Air Temperature, in degrees F. 



Highest 60, 2nd 



Lowest 15, 30th 



Mean 38.0 



Range 45 



Highest mean daily 50.0 5th. 7th, 



I owest mean daily 24.5, 30th 



Mean maximum 46.1 



Mean minimum 29.8 



Greatest daily range 33, 2nd 



I-east daily range 3, 6th 



Precipitation, in inclies 



Precipitation 5.63 



Snow T, 29th 



Maximum precip. in 24 hrs 2.46. 12th 



Number of days with .01 or more 8 



Wind, in miles 



Total movement 3839 



Greatest daily movement 388 17th 



Least daily movement 18, 2nd 



Mean hourly velocity 5.3 



Maximum velocity 32, 12th 



Wind, direction 



Prevailing Direction ..NW 



North, days 7 



Northeast, days 



East, days 1 



Southeast, days 1 



South, days 4 



Southwest, days 



West, days 4 



Northwest, days 13 



Weather 



,68. 



Mean relative humidity, percent. . 



Mean cloudiness, percent 7^ 



Number of clear days 7 



Number of fair days 6 



Number of cloudy days 17 



Number of hours bright sunshine 101 



Percent of possible hours of 



bright sunshine 34.-") 



Thund'T and lightning — 



First Frost 



30.59 



29.30 



30.05 



1.29 



66.0 

 12.9 

 38.9 

 53.0 



3.41 

 2.34 



4531 



6.3 

 30.3 



WNW 



70.6 



55.1 



6 



9 



15 



121 



41.3 



Nov. 6 



30.87, 1932 

 28.73, 1904 



1.84, 1904; .89, 1943 



75, 1924, 1938 



^4, 1938 



44.1, 1931; 33.6, 1901 



8.64, 1927; .63, 1917 

 13.50, 1938 



22, 1921; 2, 1904 



5.978, 1906; 2,589, 1889 



44. 1938 



72, 1900 1927: 34, 1917 



15, 1903; 1. 1900,1911,1927 



16, '12; 4, '89, '30. '32. '35 



24, 1927; 9, 1905, 1917 



182. 1903; 66. 1927 



Oct. 10 '25; Deo. 13, 1941 



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 1946. 



