Back-sheared Anvil - [Slang], a thunderstorm anvil which spreads upwind, against the flow aloft. A back-sheared anvil often implies a very strong updraft and a high severe weather potential. (See Fig. 7, supercell.) ...
Back-sheared Anvil - A thunderstorm anvil which spreads upwind, against the flow aloft. A back-sheared anvil often implies a very strong updraft and a high severe weather potential.<> ...
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.
A back-sheared anvil often implies a very strong updraft and a high severe weather potential.
NOAA National Weather Service - Cite This Source - This Definition ...
They usually appear on the upwind side of a back-sheared anvil, and indicate rapid expansion of the anvil due to the presence of a very strong updraft. They are not mammatus clouds. See also cumuliform anvil, anvil rollover.
This upwind squall line anvil is not the same as a strongly back-sheared anvil, but consists of anvil refuse left behind as the advancing gust front moves rapidly eastward.
Slang 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.
Anvil Zits ...
Visual characteristics often include a rain-free base (with or without a wall cloud), tail cloud, flanking line, overshooting top, and back-sheared anvil, ...
 See also: Anvil, Clouds, Cloud, Shear, Upwind
  
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