A dome-like protrusion above a thunderstorm anvil, representing a very strong updraft and 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