TWENTY-FIRST ANNUAL YEAR BOOK— PART VIII 623 



.est amount in any 24 consecutive hours was 4.17 inches at Humboldt, on 

 August 20. Measurable precipitation occurred on an average of 88 days, 

 7 days less than in 1919 and 3 days more than normal. 



Snowfall. The average amount of snowfall was 21.7 inches. The 

 greatest amount reported from any station was 49.3 inches at Northwood, 

 Worth County, and the least amount was 6.5 inches at Murray, Clarke 

 County. The greatest monthly snowfall was 19.3 inches at Northwood, 

 Worth County, in December. 



Wind. The prevailing direction of the wind was from the northwest. 

 The highest velocity reported was 72 miles an hour from the southwest 

 at Sioux City, Woodbury County, on June 8. 



Sunshine and Cloudiness. The average number of clear days was 167; 

 partly cloudy, 93; cloudy, 106; as against 169 clear; 94 partly cloudy, and 

 94 cloudy days in 1919. The average percentage of the possible amount 

 of sunshine was 56 or about 5 per cent less than the normal. 



MONTHLY SUMMARIES. 

 JANUARY. 



For the State as a whole, the January temperature was below normal, 

 though the deficiency was neither uniform nor general. Over a consider- 

 able area adjoining the Missouri River the temperature was above normal, 

 and in the extreme southwest and extreme west-central portions the excess 

 amounted to nearly 4 degrees. Eastward from this area the temperature 

 gradually became colder and over the northeastern portion, along the Mis- 

 sissippi River, there was a deficiency of nearly 5 degrees. There were no 

 protracted cold periods or very severe weather, neither was there any 

 mild weather, except for short intervals. The usual January thaw was 

 absent and as a result the snow cover remained during the entire month 

 over about 75 per cent of the State, but at the close of the month bare 

 ground was general over the southern tier of counties and along the Mis- 

 souri River. 



Stock were able to graze in corn fields during the greater portion of 

 the month and favorable weather conditions permitted the usual farm 

 work, but marketing of grain was hindered by a shortage of railroad 

 cars. 



Precipitation was deficient over the entire State, except a small area 

 over the extreme north-central portion, and the average for the State, 

 0.42 inch, was with three exceptions the least for January in the past 31 

 years. Practically the entire amount fell in the form of snow or sleet 

 but there was less drifting than usual and railroad traffic was hindered 

 but little. 



The snow cover was favorable for winter grain and it is thought that 

 wheat and rye were uninjured at the end of the month except over a small 

 area in the extreme southeastern portion. An unusually large crop of 

 ice of fine quality was harvested. 



