An Investigation of Clouds and Precipitation for the Texas High Plains Page: 67
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IV. A STUDY OF SOME CHARACTERISTICALLY WET AND DRY MONTHS IN THE TEXAS PLAINS
Thus far the investigation has been limited to a discussion of charac-
teristic cloud types and amounts in the plains, their relation to some selected
synoptic events producing precipitation, and computed values of precipitable
water and stability during these periods.
It is the purpose of this section to compare some characteristically
wet and dry months on the basis of clouds, precipitable water, water vapor flux,
and synoptic situation, to obtain some idea of the role played by each in the
production of precipitation.
A. Selection of Periods for Study
Maps of the total monthly precipitation over the plains area were
constructed for each of the seven months considered in the investigation
(April thru October) during the period from 1952 until 1960. Seventy stations
were used in the analyses. On the basis of these 63 maps, months of maximum ,
and minimum precipitation were selected for intensive study. The months selected
are shown in Table 6.
As was shown in Figure 2, the period from 1952 until 1961 was composed
of 5 years of below-normal precipitation and 5 years of above-normal precipitation
so that the probability of finding a representative wet and dry month for each
of the seven months studied was enhanced.
Table 6. Selected Wet and Dry Months in the Texas Plains
Month Wet
April 1957 1956
May 1957 1953
June 1960 1953
July 1960 1957
August 1957 1956
September 1958 1956
October 1960 1952
In order to determine if the months selected were characteristically
wet and dry with respect to the long-term mean monthly precipitation, comparison
was made to the ogives in Figures 16 and 17. This comparison makes it possible
to determine the percentage of time that the monthly precipitation during the
period from 1892 until 1968 was greater (or less) than the month being considered
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Haragan, Donald R. An Investigation of Clouds and Precipitation for the Texas High Plains, report, March 1970; Austin, Texas. (https://texashistory.unt.edu/ark:/67531/metapth839452/m1/79/: accessed July 16, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.