466 IOWA DEPARTMENT OF AGRICULTURE 



of precipitation every month for 13 consecutive months; the aggregate 

 deficiency from February 1, 1916, to March 11, 1917, inclusive, is 13.04 

 inches. On the other hand, the northern counties have received about the 

 normal amount of precipitation and sleighing has been good most of the 

 winter. Some spring wheat was sown in Davis County on the 26th, not- 

 withstanding the fact that the ground was frozen to a depth of three 

 feet, except a few inches on the surface. At the end of the month there 

 were no indications of ice breaking up in any of the streams. 



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

 30.16 inches. The highest recorded was 30.92 inches, at Omaha, Neb., on 

 the 2d and the lowest was 29.20 at Sioux City ^n the 16th. The monthly 

 range was 1.70 inches. 



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

 records of 107 stations, was 15.2°, or 5.3° lower than the normal. By di- 

 visions, three tiers of counties to the division, the means were as follows: 

 Northern, 9.9°, or 7.2° lower than the normal; Central, 15.3°, or 5.4° 

 lower than the normal; Southern, 20.5°, or 3.1° lower than the normal. 

 The highest monthly mean was 24.8° at Northboro, and the lowest monthly 

 mean was 5.9° at Forest City. The highest temperature reported was 68°, 

 at Northboro, on the 25th, and the lowest temperature reported was -37°, 

 at Inwood, on the 2d. The temperature range for the state was 105°. 



Humidity. — The average relative humidity for the state at 7:00 a. m. 

 was 80.2 per cent, and at 7 p. m. it was 70.2 per cent. The mean for 

 the month was 75.5 per cent, or about 4.2 per cent lower than the normal. 

 The highest monthly mean was 87.0 per cent, at Charles City, and the 

 lowest was 64.8 at Omaha, Neb. 



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

 the records of 114 stations, was 0.36 inch, or 0.79 inch less than the nor- 

 mal. By divisions, the averages were as follows: Northern, 0.59 incji, 

 or 0.32 inch less than the normal; Central, 0.37 inch, or 0'.93 inch less 

 than the normal; Southern, 0.12 inch, or 1.23 inches less than the normal. 

 The greatest amount, 1.J.9 inches, occurred at Nora Springs, and the least, 

 a trace, at seven stations in the southern division. The greatest amount 

 in any 24 consecutive hours, 1.00 inch, occurred at Nora Springs, on the 

 19th. 



Snow. — The average snowfall for the state vas 3.5 inches, or 3.9 inches 

 ess than the normal. The greatest amount, 11.6 inches, occurred at 

 Horm Lake, and the least, a trace, at 10 stations in the southern di- 

 /ision. 



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

 The highest velocity reported from a regular Weather Bureau station 

 was 69 miles an hour from the northwest, at Sioux City, on the 4th. 



SunsM7ie and Cloudiness. — The average per cent of the possible amount 

 of sunshine was 63, or about 8 per cent higher than the normal. The 

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

 was as follows: Charles City, 58; Davenport, 56; Des Moines, 61; Du- 

 buque, 62; Keokuk, 71; Sioux City, 59; Omaha, Neb., 73. 



Miscellaneous Phenomena. — Dates of: Fog, 13, 14, 15, 19, 22, 26, 27. 

 Halos, solar or lunar, 1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 19, 28. Sleet or glaze 



