Table 1 -- Average diurnal temperature range for climatological division. Table 2 -- Table used to construct annual temperature curves. Table 3 -- Frost penetration in North Dakota. Table 4 -- Average annual number of snowfalls of stated amounts. Table 5 -- Average annual number of precipitation events of stated amounts. Table 6 -- Return period values in inches of precipitation. Table 7 -- Average number of thunderstorms by month. Table 8 -- Average relative humidity by month for a year. Table 9 -- Percent of possible sunshine by months for a year. Table 10 -- Average number of clear, partly cloudy, and cloudy days between sunrise and sunset. Table 11 -- Average number of days fog reduces visibility. Table 12 -- Average wind speed, prevailing direction, and extreme mile of wind. Table 13 -- North Dakota tornado statistics. Table 14 -- Frequency distributions of tornadoes, windstorms, and hailstorms. Table 15 -- Frequency of blizzards by state for years 1957-67.
List of Figures
Figure 1 -- Elevation in hundreds of feet above mean sea level. Figure 2 -- Annual mean temperature. Figure 3 -- December mean temperature. Figure 4 -- January mean temperature. Fiugre 5 -- February mean temperature. Figure 6 -- March mean temperature. Figure 7 -- April mean temperature. Figure 8 -- May mean temperature. Figure 9 -- June mean temperature. Figure 10 -- July mean temperature. Figure 11 -- August mean temperature. Figure 12 -- September mean temperature. Figure 13 -- October mean temperature. Figure 14 -- November mean temperature. Figure 15 -- April through July mean temperature. Figure 16 -- April through September mean temperature. Figure 17 -- Extreme high temperature. Figure 18 -- Extreme low temperature. Figure 19 -- Annual number of days 90° F or above. Figure 20 -- Annual number of days 32° F or below. Figure 21 -- Annual number of days 0° F or below. Figure 22 -- Graph of annual temperature curves constructed for Buxton, North Dakota. Figure 23 -- Map showing length of feeze period, and first and last occurence of 32° or lower temperature. Figure 24 -- Mean soil temperature at four sites in North Dakota for the period 1962-1965. Figure 25 -- Air and soil temperature profile. Figure 26 -- December mean precipitation in inches. Figure 27 -- January mean precipitation in inches. Figure 28 -- February mean precipitation in inches. Figure 29 -- March mean precipitation in inches. Figure 30 -- April mean precipitation in inches. Figure 31 -- May mean precipitation in inches. Figure 32 -- June mean precipitation in inches. Figure 33 -- July mean precipitation in inches. Figure 34 -- August mean precipitation in inches. Figure 35 -- September mean precipitation in inches. Figure 36 -- October mean precipitation in inches. Figure 37 -- November mean precipitation in inches. Figure 38 -- April through July mean precipitation in inches. Figure 39 -- April through September mean precipitation in inches. Figure 40 -- October through March mean precipitation in inches. Figure 41 -- Annual mean precipitation in inches. Figure 42 -- Average mean annual snowfall for period 1930-31 through 1959-60. Figure 43 -- Mean seasonal maximum snow depth. Figure 44 -- Mean seasonal number of days with snow depth of 1 inch or more. Figure 45 -- Mean seasonal number of days with snow depth of 6 inches or more. Figure 46 -- Mean seasonal number of days wiht snow depth of 18 inches or more. Figure 47 -- Mean date of first one inch or more snow depth. Figure 48 -- Mean date of last one inch snow cover in spring. Figure 49 -- Percent chance of measurable precipitation for each hour. Figure 50 -- Percentage frequency of hours in month in which snow, rain or drizzle, and freezing rain. Figure 51 -- Percentage frequency of hours in month in which fog, smoke or haze, blowing snow, or dust restricted visibility. Figure 52 -- Wind roses for Fargo, Minot and Bismarck. Figure 53 -- Hail climatology for North Dakota. Figure 54 -- Climatological divisions in North Dakota.