During one of these phenomena, low-level shear aligned by updrafts is penetrated by cold   air from the downdraft, creating "hook echo" patterns on Doppler radar.
During one of these phenomena, low-level shear aligned by updrafts is penetrated by cold   air from the downdraft, creating "hook echo" patterns on Doppler radar. In fair weather, one  of these phenomena occurring over a body of water is called a (*) waterspout. The Enhanced  Fujita scale rates the damage of, for 10 points, what rotating columns of air formed when funnel  clouds reach the ground?
During one of these phenomena, low-level shear aligned by updrafts is penetrated by cold   air from the downdraft, creating "hook echo" patterns on Doppler radar.
tornadoes (prompt on funnel cloud before mentioned; prompt on waterspout, twister, or  cyclone)