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John M. Peters, Christopher J. Nowotarski, and Gretchen L. Mullendore

; Hernandez-Deckers and Sherwood 2016 ). Though some nonsupercellular modes of deep convection (such as mesoscale convective systems) may last for more than an hour, the lifetimes of the individual thermals is often less than 15 min (e.g., Hernandez-Deckers and Sherwood 2016 ). Supercell updrafts tend to be relatively wide, sometimes exceeding 10 km in diameter (e.g., Peters et al. 2019b , hereafter P19 ). The diameter of thermals in ordinary convection, on the other hand, is often closer to 1 km or

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