THIRTEENTH ANNUAL YEAR BOOK— PART I 21 



inch less than the normal; Central, 1.03 inches, or 0.40 inch less than the 

 normal; Southern, 0.96 inch, or 0.48 inch less than the normal. The great- 

 est amount, 2.38 inches, occurred at Storm Lake, Buena Vista County, and 

 there was none, at Rock Rapids, Lyon County. The greatest amount in 

 any 24 consecutive hours, 2.38 inches, occurred at Storm Lake, on the 

 12th. Measurable precipitation occurred on an average of 2 days. 



Snow. — The average fall for the Northern Section was a trace, for the 

 Central a trace, and for the Southern 0.1 inch. For the state the average 

 was a trace. Stockport, Van Buren County, reported the greatest monthly 

 snowfall, 1.0 inch. 



Sunshine and Cloudiness. — The average number of clear days was 18; 

 partly cloudy, 8; cloudy, 4. The duration of sunshine was much above the 

 normal, the percentage of the possible amount being 69 at Charles City; 

 66 at Davenport; 81 at Des Moines; 57 at Dubuque; 69 at Keokuk, and 74 

 at Sioux City. 



Wind. — Northwest winds prevailed. The highest velocity reported was 

 at the rate of 48 miles an hour from the northwest, at Sioux City, Wood- 

 bury County, on the 22d. 



NOVEMBER NORMALS FOR IOWA— 1890-1912. 

 Normal temperature for November, 35.8°. 

 Warmest November, 1899, with mean temperature of 43.9°. 

 Coldest November, 1896, with mean temperature of 29.6°. 

 Normal precipitation for November, 1.45 inch. 

 Wettest November, 1909, with total precipitation of 5.39 inches. 

 Driest November, 1904, with total precipitation of 0.15 inch. 

 Average depth of snowfall for November, 2.4 inches (1892 to 1912 in- 

 clusive). 



Greatest snowfall in November, 8.7 inches in 1898. 



Least snowfall in November, trace in 1912. 



Average number of days with 0.01 inch or more of precipitation, 5. 



Prevailing direction of wind, northwest. 



Average number of clear days, 13; partly cloudy, 8; cloudy, 9. 



DECEMBER. 



December, like November and the latter half of October, was unusually 

 mild and pleasant, with high average temperatures, deficiency of precipi- 

 tation, excess of sunshine and no storms of importance. It was the warm- 

 est December since. 1896, and the mean temperature has been exceeded 

 only twice, December, 1891, and 1896, since state-wide observations began 

 in 1890. The 12th was generally the coldest day, but the lowest tempera- 

 ture recorded in the state, — 13°, occurred at Inwood, Lyon County, on the 

 6th. 



The precipitation was light, there being only 62 per cent of the normal 

 amount and most of it came during the first five days. After the 5th, 

 only light snow flurries occurred at most stations. The amount of snow- 

 fall was also very light, and especially so over the central and southern 

 districts, where the average amount for the month was only 0.6 inch. The 

 greatest amounts of snowfall were reported from the extreme north central 

 counties. The clear, mild and dry weather was favorable for all kinds of 



