PART I. 



Report of the Iowa Weather and Crop Service for 



1911 



George M. Chappel, Director 



Climatic data and statistics of soil products of the State, for the 

 year 1911, have been compiled in condensed form in this report 

 for future reference and comparison. 



Reports have been received regularly each month from 118 co- 

 operative meteorological stations, and from the U. S. AYeather 

 Bureau stations at Des ]\Ioiues, Davenport, Dubuque, Charles City, 

 Keokuk and Sioux City, Iowa and Omaha, Nebr. The equipment 

 at all stations has been kept up to a high standard. 



This office distributed 28,000 copies of the ]\ronthly Review of the 

 Iowa Weather and Crop Service, and 45,000 copies of the weekly 

 weather crop bulletins. Through the generous co-operation of many 

 of the telephone companies in the State, daily weather forecasts 

 were distributed to over 150,000 telephone subscribers each day. 

 Daily forecasts were also distributed by rural mail to 2,268 ad- 

 dresses, and by ordinary mail to 2,016 addresses. Daily forecast 

 messages were sent to 135 towns by telegraph at expense of the 

 U. S. Weather Bureau. Special warnings of the approach of cold 

 waves and heavy snows were also distributed whenever issued. 



CLIMATOLOGY OP THE YEAR, 1911. 



While there were many and decided departures during the year from the 

 normal climatic conditions, the average temperature and total precipita- 

 tion approximate the normals very closely. The most striking character- 

 istics during the year were the excess of temperature in February, March, 

 June and the first five days of July; the deficiency of rainfall in May, June, 

 July, and August, and the unusually heavy precipitation during December. 

 The maximum temperatures during the first five days of July were the 



