,;iural College, 

 AMHERST, MASS. 



BULLETIN No. 411. 



MARCH. 1923 



Meteorological Observations 



AT THE 



MASSACHUSETTS 



AGRICULTURAL EXPEllIMENT 



STATION. 



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



Height of barometer cxbove ground, ^i ft. Above sea /evet, 2yj.j ft. 

 Height oj Wind Instruments J 2 ft. 2'ime used, y^th Mer. 



MONTHLY SUMMARY. 



Pressote. In inches. 



Maximum reduced to freezing, 30.46, isth, lOA 

 Minimum reduced to freezing, 28. S3, 7th. ioa 

 Reduced maximum reading 30. "S, 15th, 1 

 Reduced minimum reading, 29.15, 7th, loA 



Mean semi-daily reduced 30.022 



Monthly range 1.63 



Air Temperature. 



In Degrees Fahr. 



Highest 60.0, 23d, 2P 



Lowest -4.0, 9th, 7A 



Mean hourly 28.1 



Mean of means of max. and min 2S.6 



Mean sensible (wet bulb) 24.9 



Monthly range 64.0 



Highest mean daily 46.S, 23d 



Lowest mean daily 12.9, 9th 



Mean maximum 39.6 



Mean mininnim 17.6 



Mean daily range 22.0 



Greatest daily range 36,0, 9th 



Least daily range 8.0, 13th 



Hnmidity. 



Mean dew point 20.0 



Mean force of vapor 159 



Mean relative humidity 76.3 



Precipitation. In inches. 



Total precipitation, in inches 1.9S 



Total snow, in inches 8 



Number of days on which .01 inch or more 



rain fell 10 



Days of sleighing 23 



•Temperature in ground shelter. 

 ••Reduced to freezingand sea-level. 



Wind. 



Total movement 6058 m 



Greatest daily movement 405m, 5th 



Least daily movement 45m, 13th 



Mean daily movement 195m 



Mean hourly velocity 8.1m 



Maximum pressure per square foot, 17.5 lbs = 



59m per hour, 28th, 3 P., W.N. W. 

 Maximum velocity for 5 minutes, 36 m per 



hour, 28th, 2P., W.N.W. 

 Prevailing direction, West Southwest. 



Summary. 



Southwest ig per cent 



West Northwest 19 " " 



Northwest 16 " " 



South Southwest 13 " " 



South 13 " " 



Other directions 20 " " 



Weather. 



Mean cloudiness observed .... 40 per cent 

 Total cloudiness recorded by the Sun 



Thermometer . . 179 hours = 48 per cent. 



Number of clear days 12 



Number of fair days . 7 



Number of cloudy days 12 



Bright Sunshine. 



Number hours recorded, 192 = 52 per cent. 



Rain, 4th, 13th, 14th, 16th, igth, 22d, 23d, 



24th, 27th, 

 Snow. 6th, 7th, loth, 12th, 24th, 2Sth, 30th, 



31st. 



Gales, 35 or more miles per hour, 37m, 4th, 

 W.N.W.; 48m, 5th, N.W.; 35m, nth, 

 W.N.W.; 39m, 14th, N.W.; 41m, i6th, 

 S.S..W.: 52m, 19th, W.N.W.; 40m, 20th, 

 N.W.; 48m, 24th, N.W.; 35m, 2,tli, 

 S.S.W.; 59m, 28th, W.N.W.; 41m, 29th, 

 N.W.; 47m, 31st, N.W. 



