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Eta Cross-Section of Fgen, Temp, RH, and Ageo Circ at 00z, 09/18
Heavy Rain Band
Feeder Band Zone
Eta 0-hr cross-section of 2-D frontogenesis (white contours), temperatures (blue contours), relative humidity (shaded), and ageostrophic streamlines (tan), valid at 00z, 9/18/04. The heaviest rain bands are located where strong frontogenesis and a deep layer of saturation co-exist, along with anomalously high warm cloud depths to enhance the efficiency of the rainfall.