TWENTIETH ANNUAL YEAR BOOK— PART VIII 713 



Humidity. The average relative humidity for the State at 7 a. m. was 

 82 per cent and at 7 p. m., R9 per cent. The mean for the month was 76 

 per cent, which is about normal. The highest mean was 82 per cent at 

 Charles City, and the lowest, 72 per cent, at Keokuk. 



Precipitation. The average precipitation for the State, as shown by the 

 records of 104 stations, was 3.40 inches, or 1.89 inches above the normal. 

 By divisions the averages were as follows: Northern, 3.15 inches, or 1.74 

 inches greater than the normal ; Centi-al, 3.39 inches, or 1.86 inches greater 

 than the normal; Southern, 3.66 inches, or 2.08 inches greater than the 

 normal. The greatest amount, 6.22 inches, occurred at Indianola, and the 

 least, 1.97 inches, at Storm Lake. The greatest amount in 24 consecutive 

 hours, 3.85 inches, occurred at Thurman, on the 9th. 



Snovrfall. The average fall for the State was 6.3 inches, which is 3.8 

 inches more than the normal. The heaviest fall was 17.0 inches at Har- 

 lan. Practically the entire fall of snow occurred on the 27th, 28th and 

 29th, when one of the largest November snows on record occurred over a 

 large portion of the State. The snowfall was light over the extreme east- 

 central and southeast portions, a few stations reporting less than 1.0 inch. 



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

 highest velocity reported from a regular Weather Bureau station was at 

 the rate of 63 miles an hour, from the southwest, at Keokuk on the 10th. 

 This is the highest of record in this State in November. 



Sunshine. The average per cent of the possible amount of sunshine 

 was 47, or 7 per cent less than the normal. The per cent of the possible 

 amount at the regular Weather Bureau stations was as follows: Charles 

 City, 36; Davenport, 52; Des Moines, 50; Dubuque, 49; Keokuk, 51; Sioux 

 City, 41; Omaha, Nebr., 48. 



Miscellaneous Phenomena. Aurora 11th, 29th. Fog, dense, 2d, 7th, 

 8th, 9th. 21st, 29th. Halo, lunar, 4th, 18th. 29th. Halo, solar, 2d, 12th, 

 16th, 17th, 18th, 24th. Meteor, 2d. Sleet, 10th, 27th. 28th, 29th. Thunder- 

 storms, 6th, 8th, 9th, 10th, 18th, 24th, 25th. 



Rivers. Heavy rains, 9th-10th, caused sharp rises in the Mississippi 

 and the interior rivers of the State, amounting to 5 to 7 feet in the latter. 

 At Ottumwa, on the Des Moines river, the crest stage, 8.8 feet, is within 

 1.2 feet of the flood stage. 



