Hook echoes are not always obvious. In the U.S. Southern states, thunderstorms tend to produce heavier rainfall which obscures the hook shape.
Hook Echo - A radar pattern sometimes observed in the southwest quadrant of a tornadic thunderstorm.
Hook (or Hook Echo) - A radar reflectivity pattern characterized by a hook-shaped extension of a thunderstorm echo, usually in the right-rear part of the storm (relative to its direction of motion).
HOOK ECHO A radar reflectivity pattern observed in a thunderstorm, appearing like a fish hook and indicating favorable conditions for tornadic development. However, hook echoes and tornadoes do not always accompany each other.
Hook or Hook Echo A pendant or hook on the right rear of a radar echo that often identifies mesocyclones on the radar display.
Hook echo A distinctive radar pattern that often indicates the presence of a severe thunderstorm cell and perhaps tornadic circulation.
HOOK - A region of precipitation being pulled around the rotation associated with a supercell thunderstorm. On a radar scope, this feature appears as a hook on the backside of the storm in the sense of the rotation of the storm.
Panhandle Hook - permalink - collapse
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Low pressure systems that originate in the panhandle region of Texas and Oklahoma which initially move east and then "hook" or recurve more northeast toward the upper Midwest or Great ...
Panhandle Hook
Low pressure systems that originate in the panhandle region of Texas and Oklahoma which initially move east and then "hook" or recurve more northeast toward the upper Midwest or Great Lakes region.
Scattered large precipitation particles (rain and hail) at the interface between the clear slot and wall cloud may show up on radar as a hook or pendant; thus the presence of a hook or pendant may indicate the presence of an RFD.
Hook gauge An instrument used to measure changes in the level of the water in an evaporation pan. The gauge is normally placed in a stillwell and adjusted so that the point of the hook just breaks the water surface.
Hook Echo: A pattern on a radar scope which resembles a hook often associated with a tornado.
Horizon: A distant point from the observer where the sky and the ground meet.
Horse Latitudes: An area of calm winds at about 30 degs.
Locating Tornadoes hook echoes and velocity couplets
Tornadoes are often located at the center of a hook-shaped echo on the southwest side of thunderstorms. The hook is best observed in the reflectivity field.
Radar characteristics often (but not always) include a hook or pendant, bounded weak echo region (BWER), V-notch, mesocyclone, and sometimes a TVS.
Radar signature generally similar to a hook echo, except that the hook shape is not as well defined.
Penetrating top
See overshooting top.
still well"A device, used in evaporation pan measurements, that provides an undisturbed water surface and support for the hook gauge. The National Weather Service model consists of a brass cylinder, 8 in. high and 3.5 in.
This area often coincides with a radar hook echo and/or mesocyclone, especially one associated with an HP storm. The term reflects the danger involved in observing such an area visually, which must be done at close range in low visibility.
Snow - Large flat ice crystals that hook onto each other and make white flakes.
Bear's Cage - [Slang], a region of storm-scale rotation, in a thunderstorm, which is wrapped in heavy precipitation. This area often coincides with a radar hook echo and/or mesocyclone, especially one associated with an HP storm.
 See also: Storm, Radar, Air, Weather, Cloud
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