580 TWENTY-THIRD ANNUAL YEAR BOOK— PART VIII 



buildings. One man was severly injured; horses, cattle, hogs and chickens 

 were killed and fruit trees suffered considerable damage as a result of 

 this storm. The path .of the storm where the greatest damage occurred 

 was about two miles wide and four miles long. 



Pressure. The mean pressure (reduced to sea level) for the State was 

 29.92 inches. The highest recorded was 30.38 inches at Duqubue, on the 

 28th, and the lowest was 29.41 inches at Davenport, on the 18th. The 

 monthly range was 0.97 inch. 



Temperature. The mean temperature for the State, as shown by thi 

 records of 98 stations was 63.4° or 2.9° higher than the normal. By 

 divisions, three tiers of counties to the division, the means were as fol- 

 lows: Northern, 61.9°, or 2.9° higher than the normal; Central, 64.0°, 

 or 3.3° higher than the normal; Southern, 64.3°, or 2.6° higher than the 

 normal. The highest monthly mean was 67.8°, at Fairport, and the lowest 

 was 60.4°, at Estherville. The highest temperature reported was 91° at 

 Cedar Rapids, on the 10th, and the lowest was 34° at Pocahontas on the 

 13th and Washta, on the 7th and 13th. The temperature range for the 

 State was 57°. 



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

 77 per cent, and at 7 p. m. it was 58 per cent. The mean for the month 

 was 68 per cent, which is just normal. The highest monthly mean was 

 72 per cent, at Charles City, and the lowest was 62 per cent, at Sioux 

 City. 



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

 records of 100 stations, was 3.53 inches, or 1.04 inches less than the nor- 

 mal. By divisions the averages were as follows: Northern, 2.47 inches, or 

 2.01 inches less than the normal; Central, 3.92 inches, or 0.67 inch less 

 than the normal; Southern, 4.21 inches, or 0.43 inch less than the normal. 



The greatest amount, 8.36 inches, occurred at Ames, and the least, 0.47 

 inch, occurred at Algona. The greatest amount in 24 consecutive hours, 

 3.90 inches, occurred at Lacona, on the 24th 



Wind. The prevailing direction was from the south. The average 

 velocity was 8.0 miles per hour, or 0.7 mile less than the normal. The 

 highest velocity reported from a regular Weather Bureau Station was at 

 the rate of 48 miles an hour, from the southwest, at Sioux City, on the 

 11th. 



Sunshine and Cloudiness. The average per cent of the possible amount 

 of sunshine was 59, or 3 per cent less than the normal. The per cent of 

 the possible amount at the regular Weather Bureau Stations was as fol- 

 lows: Charles City, 56; Davenport, 55; Des Moines, 56; Dubuque, 52; 

 Keokuk, 65; Sioux City, 54; Omaha, Nebr., 72. 



Miscellaneous Phenomena. Aurora: 20th. Fog: 3d, 13th, 16th, 17th, 

 24th, 30th. Frost: (light) 13th. Hail: 2d, 3d, 5th, 6th, 8th, 11th, 12th, 

 13th, 14th, 15th, 16th, 20th, 24th, 25th, 26th, 28th, 30th. Halos: 1st, 2d, 3d, 

 4th, 7th, 8th, 13th, 14th, 15th, 27th. Rainbows: 5th, 15th, 16th, 17th, 26th. 



Thunderstorms: All dates except 1st, 7th, 19th, 20th, 21st, 28th, 29th, 

 31st. Tornadoes: 8th, 11th. 



