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- [Slang], a lightning discharge occurring within the anvil of a thunderstorm, characterized by one or more channels that appear to crawl along the underside of the anvil. They typically appear during the weakening or dissipating stage of the parent thunderstorm, or during an active MCS.
NOAA National Weather Service - Cite This Source - This Definition
- Anvil Zits, CA, CC, CG, CSDRBL, Heat Lightning, In-Cloud Lightning, LALs, LDS, Lightning, Lightning Discharge, LTNG, Positive Cloud to Ground Lightning, St. Elmo\'s Fire, Staccato Lightning, Thunder, Thunderstorm