PART I. 



Report of the Iowa Weather and Crop Service for 



1910. 



George M. Chappel, Director. 



This report is a compilation of climatic data and statistics of soil 

 products, for the year 1910, in convenient form for reference and 

 comparison. 



Meteorological reports were received regularly each month of 

 the year from 120 co-operative and 7 regular stations of the U. S. 

 "Weather Bureau, and weekty weather and crop reports were re- 

 ceived during the six crop months from 175 correspondents. 



During the year this office distributed 42,000 copies of the weekly 

 bulletin (issued during the six crop months) ; also 27,000 copies of 

 the Monthly Review of the Weather and Crop Service, and 5,000 

 pamphlets giving the precipitation data for the several drainage 

 basins of the State, which were printed by the Chief U. S. Weather 

 Bureau. 



The distribution of the daily weather forecasts was continued 

 during the year as follows : by telephone, 171,389 ; rural mail serv- 

 ices, 4,189; ordinary mail, 1,993; by telegraph at expense of U. S. 

 Weather Bureau, 142, making a total of 177,711 forecasts distrib- 

 uted daily. Special warnings of the approach of cold waves and 

 heavy snows were also distributed whenever issued. 



CLIMATOLOGY OF THE YEAR, 1910. 



The year, 1910, was in some respects extremely abnormal. It was ihe 

 driest year on record since observations began in 1S90, and the early spring 

 and fall months were warm and pleasant; the average temperature for 

 the latter half of March being higher than the mean for the latter half of 

 April. The precipitation was below the normal every month of the year 

 except January and September, and the excess in these months was small. 

 There were not as many severe wind storms as usual and the average 

 amount of snowfall was less than 50 per cent, of the amount for 1909. 



Baeometeb, (Reduced to sea level.) — The mean pressure of the atmos- 

 phere for the year 1910, was 30.04 inches. The highest observed pressure 

 was 30.83 inches, at Keokuk. Lee County on December 13th. The lowest 



