PART X 



Annual Report of Iowa Weather and Crop Bureau 

 for 1916 



GEORGE M. CHAPPEL, Director 



This report is issued so that the summaries of the monthly and 

 weekly bulletins issued by the Iowa Weather and Crop Service, in 

 eo-operation with the Weather Bureau of the United States Depart- 

 ment of Agriculture, may be put in shape for convenient reference 

 and comparison with past and future years. 



The regular meteorological, climatological and crop statistical 

 work of the Service has been maintained and kept up to the high 

 standard of efficiency of past years; more than the usual attention 

 having been devoted to the accuracy of the reports and the expo- 

 sure of instruments. 



Twenty-four thousand copies of the monthly Climatological Ex- 

 ports, and 31,000 copies of the weekly Weather Crop Bulletins were 

 issued and distributed during the year. Five hundred of the monthly 

 reports are distributed each month through the Weather Bureau, 

 U. S. Department of Agriculture to scientific institutions and li- 

 braries in this and foreign countries. 



The daily weather forecasts were distributed by telegraph at the 

 expense of the U. S. Weather Bureau to 82 towns, by franked mail 

 to 1,985 addresses, by rural delivery to 93-1 addresses, and by free 

 telephone to 114,132 subscribers. Preparation was made to have 

 frost warnings sent, in case of necessity, during the fruit blooming 

 season, to all orchardists in the state who were prepared to use or- 

 chard heaters in case of frost or injurious temperatures. 



CLIMATOLOGY OF THE YEAR 1916 



The year 1916 was slightly cooler and much drier than usual. The 

 mean temperature was 47.2°, or 0.2° below the nonnal, and the aver- 

 age precipitation was 28.90 inches, or 3.7 inches less than the norniul. 

 There were, however, some unusually high temperatures and excet>- 

 sively heayv'^ rainfall. The most marked features in this respect he- 



