Fig. 2—Synoptic weather data for well-organized systems. (a) Data
for rain of Sept. 1, 1961; 500-mb data at 1900 EST; surface data at 1300
EST. (b) Data for rain of Sept. 23, 1961; 500-mb data at 1900 EST; sur-
face data at 0100 EST on September 24; (c) Data for rain of June 25,
1962; 500-mb data at 1900 EST; surface data at 1300 EST.