METEOROLOGICAL TABLES. 



MONTHLY METEOROLOGICAL SUMMARY, LANSING, MICHIGAN, SEPTEMBER, 1921. 



139 



Barometer — Mean, 29.98 inches; highest, 30.33, on 13th; lowest, 29.40, inches on 30th. 



Temperature— Highest, 89°, on 1st; lowest. 40°, on 26th; greatest daily range, 31°, on 19t'i: least daily range, 11°, on 16th; 

 normal temperature, 61.6°; departure, +5.0°; accumulated departure since January 1, +1363°; average daily departure since 

 January 1, +5.0°; highest in 36 years, 99°; lowest, 21°. 



Precipitation (in inches)— Total this month, 2.64; normal, 2.62; departure, +0.02; since .January 1st, —0.56; greatest amount 

 in 24 hours, 1.18, on 19th and 20th; total snowfall, 0.0 in. 



Wind — Prevailing direction, southwest; total movement, 3,324 miles; averaga hcurly velocity, 4.6 miles; maximum velocity, 

 21 miles per hour from cast on 29th. 



Dates op— Auroras, 1, 2, 28; hail, 0; sleet, 0; fog- den.sc, 11: thunderstorms, 2, 3, 4, 10, 17, 20, 21, 29, 30; halos— solar, 10, 

 19, 24; halos— lunar, 0; frost- killing, 0; heavy, 0; light, 0. 



DEWEY A. SEELEY, 



Meteorologist. 



