Mas.achus.Us A.ncnUural » 

 AMHERST, MASS. 



BULLETIN No. 407. 



NOVEMBER, 1922 



Meteorolooical Observations 



AT THK 



MASSACHUSETTS 



AGllICULTURAL EXPEllIMENT 



STATION. 



Latitude, 42° 23' 48.5" N. Longitude 72° 31' 10" W. 



Height of barometer above ground, J/./?. Above sea level, 2jj.^ ft. 

 Height oj Witiii Instruments J2 ft. Time used, y^th Mer. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Miiximuni reduced to freezing,- 3o.oS,i3th, 9A 

 Minimum reduced to freezing, 29.05, 24th. 4.^ 

 Reduced maximum reading 30.39. 13th, 9A 

 Reduced minimum reading, 29.36, 24th, 4.^ 



Mean semi-daily reduced 30.015 



Monthly range 103 



Air Temperature. In Degrees Fahr. 



Highest 66.0, ist 3 p 



Lowest 14-5, 27th, 6a 



Mean hourly 39- 1 



Mean of means of max. and min 39. 5 



Mean sensible (wet bulb) 34.6 



Monthly range 51.5 



Highest mean daily 51.5, 12th 



Lowest mean daily 24.0, 27th 



Mean maximum 47.6 



Mean minimum 31.3 



Mean daily range 16.3 



Greatest daily range 36.0, 2d 



Least daily range 3.5, 7th 



Humidity. 



Mean dew point 29.4 



Mean force of vapor 237 



Mean relative humidity 73.4 



Precipitation. In inches. 



Total precipitation, in inches 1.56 



Number of days on which .01 inch or more 

 rain fell 7 



•Temperature in ground shelter. 

 ••Reduced to freezing and sea-level. 



Wind. 



Total movement 4566 lu 



Greatest daily movement 333m, 25th 



Least daily movement 39m, 4th 



Mean daily movement 152m 



.Mean hourly velocity 6.3m 



Maximum pressure per square foot, 9.0 lbs = 



42ni per hour, 24th, 4 p, N.W. 

 Maximum velocity for 5 minutes, 32 m per 



hour, 24th, IP., N.W. 

 Prevailing direction. Northwest. 



Summary. 



Northwest 27 per cent 



North Northwest 10 " " 



South Southwest i3 " " 



West Northwest 10 " " 



Nortli Northeast 10 " '■ 



North 10 " " 



Other directions 10 " " 



Weather. 



Mean cloudiness observed .... 40 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 1S4 hours = 63 per cent. 



Number of clear days 3 



Number of fair days 11 



Number of cloudy days 16 



Bright Sunshine. 



Number hours recorded, 109 = yj per cent. 

 Rain, 2d, 3d, 6th, 7th, Sth, 14th, 15th, 2otli 

 Snow, 24th, 27th, 28th. 

 Frosts, bebore the i6th, ist, 2d, loth, 13th, 



14th. 

 Hail. 20th. 

 Ciales, 35 or more miles per hour, 42m, 24th, 



N. \V. 



