EIGHTEENTH ANNUAL YEAR BOOK— PART IX 



467 



occurrea at several stations inthe southern counties on the 19th. Thunder 

 was heard or distant lightning observed during the night of the 22d-23d 

 at a number of stations in the southern division. Migration of birds at 

 Earlham, blue birds and robins on the 23d and wild ducks on the 25th. 

 At Bedford, wild ducks on the 22d. 



THE WINTER OF 1916-1917. 



The mean temperature for the three winter months was 17.0°, which 

 is 3.2° below the normal for the State. The highest temperature re- 

 ported was 68° at Northboro, Page County, on February 25. The lowest 

 temperature reported was 37° below zero at Inwood, Lyon County, on 

 February 2. 



The average monthly precipitation for the State was 0.74 Inch, and the 

 average total precipitation was 2.23 inches, or 0.74 inch less than the 

 winter normal. The average total snowfall, unmelted, was 17.4 inches, 

 or 3.1 Inches less than the normal and 0.4 inch less than the average fall 

 for the winter of 1915-16. 



The total number of days with .01 inch or more of precipitation was 

 13, or 6 less than the average for the winter of 1915-16. The average 

 number of clear days was 46, partly cloudy 24, cloudy 20, as compared 

 with 37 clear, 22 partly cloudy, and 32 cloudy days during the winter of 

 1915-16. 



COMPARATIVE DATA FOB THE STATE— FEBEHJART. 



T indicates an amount too small to measure, or less than. .005 Inch precipita- 

 tion, and less than .05 inch snowfall. 



