Penetrating Top - Same as overshooting top.
Popcorn Convection - [Slang], Showers and thunderstorms that form on a scattered basis with little or no apparent organization, usually during the afternoon in response to diurnal heating.
Penetrating Top Same as overshooting top.
Perched Groundwater Local saturated zones above the water table which exist above an impervious layer of limited extent.
(or Penetrating Top) - A dome-like protrusion above a thunderstorm anvil, representing a very strong updraft and hence a higher potential for severe weather with that storm.
Anvil DomeA large overshooting top or penetrating top.Anvil RolloverSlang for a circular or semicircular lip of clouds along the underside of the upwind part of a back-sheared anvil, indicating rapid expansion of the anvil.
Penetrating TopSame as Overshooting Top; a dome-like protrusion above a thunderstorm anvil, representing a very strong updraft and hence a higher potential for severe weather with that storm.
overshooting top"(Or anvil dome, penetrating top.) A domelike protrusion above a cumulonimbus anvil, representing the intrusion of an updraft through its equilibrium level (level of neutral buoyancy).
A large overshooting top or penetrating top on a thunderstorm.
Apparent Temperature ...
 See also: Air, Thunderstorm, Overshooting Top, Storm, Radar
  
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