LI5KAHY OF THL 



^^achusetts AuricuHnral Collf" 



AMHERST. MASS. 



BULLETIN No. 422. 



FEBRUARY, 1924 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPEHIMENT 



STATION. 



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



Height of barometer above ground, 31 ft. Aboi'e sea level, 2jj.^ ft. 

 Height oj IVitid Instruvients ^2 ft. Time used, y^thAler. 



MONTHLY SUMMARY. 



Pressuie. In inches. 



Maximum reduced to freezing 30.42, 19th, i\.\ 

 Minimum reduced to freezing, 29.29, 13th. 2 A 

 Reduced maximum reading, 30.7;, igtfi, iiA. 

 Reduced minimum reading, 



29.62, 6th, I P.; 13th, 2 A.; 20th, 7 p. 



Mean semi-daily reduced 30.069 



Mcmthly range i.13 



Air Temperature. In Degrees Fahr. 



Highest 44.5,26th, 3 p. 



Lowest -2 5, 14th, 6.30 A. 



Mean hourly 20.7 



Mean of means of ma.x. and min 20.7 



Mean sensible (wet bulb) 17.1 



Monthly range 47.0 



Highest mean daily 31.2, 3d 



Lowest mean daily 11.7, 14th 



Mean maximum 30.5 



Mean minimum 10.9 



Mean daily range 19.6 



Greatest daily range 41.0, 25th 



Least daily range 3.0, 5th 



Hamidiiy. 



Mean dew point 12,4 



Mean force of vapor loS 



Mean relative humidity 77,5 



Precipitation. In inches. 



Total precipitation, in inches 2.56 



Total snow, in inches 124 



Number of days on which .01 inch or more 



rain fell 6 



Days of sleighing 25 



Wind. 



Total movement 3971 m 



Greatest daily movement 353m, 21st 



Least daily movement 24m, loth 



Mean daily movement 137m 



Mean hourly velocity S.7ni 



Maximum pressure per square foot, 8.5 lbs = 



41m per hour, 21st, 12 a., W.N.W. 

 Maximum velocity for 5 minutes, 3oni per 



hour, 2ist, 12 M., W.N. \V. 

 Prevailing direction. Northwest. 



Summary. 



North 28 per cent 



West Northwest 21 " " 



North Northeast 17 " " 



Other directions 34 " " 



Weather. 



Mean cloudiness observed .... 32 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 91 hours = 29 per cent. 



Number of clear days 17 



Number of fair days 6 



Number of cloudy days 6 



Bright Sunshine. 



Number hours recorded, 221 =71 percent. 



Rain, 4th, 5th, 6th, 20th. 



Snow 2d, 3d, 4th, 5th, 6th, 7th, loth, 15th, 



1 8th, 2oth, 22d. 



Gales, 35 m. per hour : 41 m.. 21st. W.N.W. 



