A dome-like protrusion above a thunderstorm anvil, representing a very strong
updraftand hence a higher potential for severe weather with that storm. A persistent and/or large overshooting top (
anvil dome) often is present on a
supercell. A short-lived overshooting top, or
one that forms and dissipates in cycles, may indicate the presence of a
pulse storm or a
cyclic storm. See Figs
HP Storm
LP Storm
supercell
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