METEOROLOGICAL TABLES. 



141 



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



Barometer — Mean, 30.05 inches; highest, 30.77 inches, on 22nd; lowest, 29.38 inches, on 24th. 



Temperature — Highest, 76°, on 19th; lowest, 13°, on 29th; greatest daily range, 41°, on 19th; Ica.st daily range, 7°, on 13tli; 

 normal for month, 32.3°; excess or deficiency this month, +8.1°; accumulated excess or deficiency since January 1st, +639°; 

 average daily, same period, +7.1°; highest in 36 years, 82°; lowest, —12°. 



Precipitation (in inches) — Total amount, 3.34; normal, 2.26; excess or deficiency this month, +1.03; since Janu.ary 1st, — 1.37; 

 greatest amount in any 24 hour period, 0.76, on 20th and 21st; total snowfall, 2.1. 



Wind — Prevailing direction, southwest; total movement, 6,101 miles; average hourly velocity, 8.2 miles; maximum velocity 

 28, from the southwest, on 20th. 



Dates of— Auroras, 0; den.se fog, 26; thunderstorms, 5, 7, 20, 20, 27; halos: solar, 1, 9, 11, 1."), 16, 18, 19, 26. lunar, 0; frost : 

 killing, — ; heavy, — ; liglit, — . 



DEWEY A. SEELEY, 



Meteorologist. 



