ILLUSTRATIONS 117 
relative humidities written in figures at the sides; winds are for the 6 a.m. 
C.S.T. pilot-balloon runs. The Montgomery sounding is inserted for reference.) 
This unconventional diagram by E. J. Minser (Jan. BULL., 1938, p. 34) 
gives an interesting display of upper-air data, most of the surface data being 
omitted to avoid confusion. The situation was one in which very heavy rains 
fell in eastern Texas, Oklahoma and Mo. as the Pc and Nec cold fronts slowly 
squeezed (occluded) the moist Te sector ahead of them. 
Fic. 1. Map or 8:00 AM, EST, JuLy 8, 1935. Fic. 2. WEATHER Map or 8:00 AM, EST, 
NOVEMBER 4, 1927. 
Two great flood producing rainstorms situations are analyzed here in 
outline by H. R. Byers. Note how in each case the set up was similar: a 
more or less stalled N-S cold front with moist Ta air streaming over it rapidly 
and giving heavy rain under the front and against the mountains for many 
hours or days. (BuLL., March, 1937, pp. 128-36). The March, 1936, and May 
31, 1889 flood situations were similar too. 
