Howard H. Martin

HOURLY DISTRIBUTION AND INTENSITY OF PRECIPITATION AT KANSAS CITY, MO.

percent falls between 11 p. m. and 11 a. m. (See fig. 1.j A study of figure 2 shows a rather sharp line of demarcation between the distribution during the dormant, or winter season, and during the vegetal, or growing season. During the dormant period there is but a slight variation of frequency throughout the 24 hours, the masimum being between 3 and 4 a. m. However, during the vegetal period, with the maximum frequency at sunrise, 88 percent of the hours with measurable precipitation are between l l p. m. and l l a. m. A study of figure 3, showing the distribution of precipitation by months, reveals that January shows two periods of maximum frequency, the major between 3 a. m. and 6 a. m. with a minor between 11 a. m. and 12 noon, and a definite period of minimum precipitation f a i s between sunset and sunrise, and 77

RELATION OF WINDS TO TEMPERATURE IN CENTRAL OHIO

Abstract SYNOPSIS This paper presents by table and graph the existing relation between the direction of the wind and the existing or current temperature, as well as the subsequent 24-hour temperature change. The data are taken from the records of the Columbus (Ohio) office, 1909–1918, inclusive.

THE RELATION OF WIND DIRECTION TO SUBSEQUENT PRECIPITATION IN CENTRAL OHIO

Abstract SYNOPSIS It is the primary purpose of this paper to show, by means of table and graph, the true existing relation between the observed wind direction and subsequent precipitation. To do this, it is first necessary to establish and consider the probable frequency of precipitation in the district that the apparent relations between the two phenomena may he reduced to the true relations. Hence, the paper is divided into two parts, the first treating the frequency factor, and the second dealing with the relation of the prevailing wind direction to subsequent precipitation, and the application of the frequency factor to determine the true prognostic value of the wind direction.