520 IOWA DEPARTMENT OF AGRICULTURE 



So far as is known the winter's ice sheet has caused no material 

 damage to winter wheat and meadows. 



Pressure. — The mean pressure (reduced to sea level) for the state 

 was 30.23 inches. The highest recorded was 30.86 inches, at Sioux City, 

 on the 13th, and the lowest was 29.69, at Davenport, on the 26th. The 

 monthly range was 1.17 inches. 



Temperature. — The mean temperature for the state, as shown by th- 

 records of 105 stations, was 19.0°, or 1.5° lower than the normal. By 

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

 follows: Northern, 15.1°, or 2.0° lower than the normal; Central, 19.4°, 

 or 1.3° lower than the normal; Southern, 22.5°, or 1.1° lower than the 

 normal. The highest monthly mean was 25.6°, at Keokuk, and the lowest 

 monthly mean was 11.6°, at Estherville. The highest temperature re- 

 ported was 61°, at Sioux City, on the 19th, and the lowest temperature 

 reported was -32°, at Rock Rapids, on the 2d. The latter is the lowest 

 temperature reported in February since 1906. The temperature range for 

 the state was 93°. 



Humidity. — The average relative humidity for the state at 7 a. m. 

 was 85.4 per cent, and at 7 p. m. it was 77.7 per cent. The mean for the 

 month was 81.6 per cent, or about 2.4 per cent higher than the normal. 

 The highest monthly mean was 87.5 per cent, at Charles City, and the 

 lowest was 78.4, at Omaha, Nebr. 



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

 the records of 111 stations, was 0.55 inch, or 0.60 inch less than the 

 normal. By divisions the averages were as follows: Northern, 0.57 inch, 

 O'F 0.34 inch less than the normal; Central, 0.62 inch, or 0.58 inch less 

 than the normal. Southern, 0.46 inch, or 0.89 inch less than the normaL 

 The greatest amount, 1.38 inches, occurred at Nora Springs, and the least, 

 0.05 inch, at Osage. These stations are in adjoining counties. The 

 greatest amount in any 24 consecutive hours, 1.15 inches, occurred at 

 Nora Springs, on the 4th. 



Snowfall. — The average snowfall for the state was 6.0 inches, or 1.4 

 inches less than the normal. The greatest amount, 12.0 inches, occurred 

 at Allison, and the least, 0.5 inch, at Osage. 



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 44 miles an hour from the northwest, this occurring 

 at Sioux City, on the 26th. 



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

 of sunshine was 60, or about 4 per cent higher than the normal. The 

 per cent of the po<ssible amount at the regular Weather Bureau stations 

 was as follows: Charles City, 48; Davenport, 59; Des Moines, 64; Du- 

 buque, 66; Keokuk, 55; Sioux City, 65; Omaha, Nebr., 63. 



Rivers. — The Mississippi at Davenport was at flood stage lor several 

 hours on the 2d but a falling stage set in before serious damage occurred. 

 .\i Dubuque the river was frozen all the month, the ice there ranging 



