SEVENTEENTH ANNUAL YEAR BOOK— PART X 52:] 



Precipitation. — The average precipitation for the state, as shown by 

 the records of 110 stations, was 1.57 inches, or 0.20 of an inch less than 

 the normal. By divisions the averages were as follows: Northern, 1.28 

 inches, or 0.25 of an inch less than the normal; Central, 1.45 inches, or 

 0.42 of an inch less than the normal; Southern, 1.97 inches, or 0.05 

 of an inch more than the normal. The greatest amount, 5.80 inches, 

 occurred at Washington, and tlie least, 23 of an inch, at Northboro. 

 The greatest amount in any 24 consecutive hours, 4.41 inches, occurred 

 at Washington, on the 26th. 



The average snowfall for the state was 2.9 inches, or 2.5 inches less 

 than the normal. Thp greatest amount, 10.0 inches, occurred at Elkader 

 and Forest City, and the least, a trace, at 5 stations. 



Wind. — Thft prevailing direction of the \\ind was from the northwest. 

 The highest velocity reported from a regular Weather Bureau station 

 was at the rate of 58 miles an hour from the northwest, this occurring 

 at Sioux City, on the 6th. 



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

 of sunshine was 58, or about 4 per cent higher than the normal. The 

 per cent of possible amount at the regular Weather Bureau stations was 

 as follows: Charles City, 41; Davenport, 57; Des Moines, 63; Dubuque, 

 59; Keokuk, 60; Sioux City, 58; Omaha, Nebr., 65. 



Miscellaneous Phenomena. — Auroras were observed on the 6th, 7th, 

 8th, 9th, 10th and 23d. Thunderstorms occurred on the 21st, 22d, 23d, 24th, 

 25th, 26th, 30'th and 31st. Fog w^as noted on the 1st, 6th, 7th, 9th, 12th, 

 13th, 25th, 26th, 29th and 30th. Sleet occurred on the 5th, 6th, 11th, 

 19th, 22d, 24th, 25th and 26th. On the 24th the atmosphere had a smoky 

 appearance. 



Rivers. — As a result of the six-day period of heavy precipitation covering 

 the 21st to the 26th the Mississippi at Dubuque rose five and one-haM 

 feet in three days, reaching a maximum stage of 12 feet on the morning 

 of the 27th; this is an exceptional rise for the length of time. All small 

 streams, as well, in northeastern Iowa were at flood stage on the 25th 

 and 26th. In the Davenport district the Mi&sissippi rose rapidly as a 

 result of the heavy rains on the 25th and 26th. The crest of the rise 

 reached Davenport on the 30th, with a stage of 12.4 feet, and Muscatine 

 on the 31st, with a stage of 14.8 feet. In Keokuk district the Mississippi 

 and its tributaries, including the lower Des Moines River, reached the 

 flood stage after the 27th, and unprotected lowlands were flooded by 

 the 29th. 



