GRAIN SORGHUMS IN THE TEXAS PANHANDLE. 



TEMPERATURE. 



The data on mean, maximum, and minimum temperatures, by 

 months, for the growing season (April to September) in the 6-year 

 period from 1914 to 1919, inclusive, are given in Table III. The 

 summer days usually are warm to hot, followed by cool nights, which 

 gives a wide range of temperature during the 24 hours. The maxi- 

 mum temperature frequently goes near the 100° F. mark, but seldom 

 exceeds it. June 29, 1918, was the hottest day recorded in this 

 6-year period. On that date the temperature registered 106° F. 



Table III. — Monthly data on temperature and wind movement recorded at Amarillo, Tex. , 

 in the six months from April to September, inclusive, each year, during the 6-year 

 period from 1914 to 1919, inclusive. 



Year arid month. 



Season of 1914: 



April 



May 



June 



July 



August... 



September 

 Season of 1915: 



April 



May 



June 



July 



August . . . 



September 

 Season of 1916: 



April 



May 



June 



July 



August . . . 



September 

 Season of 1917: 



April 



May 



June 



July 



August . . . 



September 

 Season of 1918: 



April 



May 



June 



July 



August . . . 



September 

 Season of 1919: 



April 



May 



June 



July 



August . . . 



September 



Temperature. 



Maximum. 



Reading. 



Date. 



92 

 103 



102 

 95 

 94 



100 

 100 

 97 

 91 



100 

 100 

 95 

 94 



87 

 93 

 106 



88 

 87 

 90 

 95 

 101 



Minimum. 



Reading. Date 



Wind. 



Prevail- 

 ing 

 direction 



SW. 



S. 

 SW. 



s. 



s. 

 s. 



s. 

 s. 

 s. 

 s. 

 s. 

 s. 



NE. 

 SW. 



s. 



s. 

 s. 

 s. 



s. 



SE. 

 SE. 



s. 

 s. 



SE. 

 SW. 



s. 

 s. 

 s. 

 s. 

 s. 



SW. 

 NE. 

 SE. 



s. 

 s. 

 s. 



Monthly 

 move- 

 ment. 



Highest 

 hourly 

 move- 

 ment. 



Miles. 

 9,827 

 8,416 

 10,429 i 

 6,023 ! 

 6,559 

 7,938 



7,997 

 9,263 

 8,841 

 8,893 

 6,232 

 7,860 



9,123 



9,585 

 8,988 

 6,856 

 7,652 

 8,174 



10, 157 

 9,032 

 8,972 

 8,393 

 7,147 

 6,4 



8,176 

 8,943 

 6,727 

 7,823 

 7,898 

 8,176 



8,417 

 7,060 

 6, 561 

 8,341 

 6,760 

 7,730 



Miles. 



40 

 37 

 40 

 40 

 31 

 40 



46 

 44 

 37 

 44 

 27 

 33 



42 

 37 

 35 

 25 

 39 

 35 



42 

 25 

 40 

 32 

 39 

 35 



37 

 32 

 26 

 32 

 38 

 26 



44 

 39 

 42 

 35 

 38 

 31 



In winter the temperature sometimes reaches zero, and occasion- 

 ally lower temperatures occur for short periods only. The average 

 date of the last spring frost is about April 19 and that of the first 

 fall frost October 30, leaving an average frost-free period of 194 days. 

 52686°— 21— Bull. 976 2 



