Vertical cross-section through a supercell showing the BWER.
The bounded weak echo region, also known as a BWER or a vault, is a radar signature within a thunderstorm characterized by a local minimum in radar reflectivity at low levels which extends upward into, and is surrounded by, higher reflectivities aloft, forming a kind of dome of weak echoes. This feature is associated with a strong updraft and is almost always found in the inflow region of a thunderstorm: it cannot be seen visually.[1] The BWER has been noted on radar imagery of severe thunderstorms since 1973 and has a lightning detection system equivalent known as a lightning hole.[2]
^National Weather Service. "Bounded Weak Echo Region". Meteorological Glossary. National Oceanic and Atmospheric Administration. Retrieved 2008-02-08.
^Martin J. Murphy and Nicholas W. S. Demetriades. An Analysis of Lightning Holes in a DFW Supercell Storm Using Total Lightning and Radar Information. Retrieved on 2008-01-08.
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