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Adam C. Varble, Stephen W. Nesbitt, Paola Salio, Joseph C. Hardin, Nitin Bharadwaj, Paloma Borque, Paul J. DeMott, Zhe Feng, Thomas C. J. Hill, James N. Marquis, Alyssa Matthews, Fan Mei, Rusen Öktem, Vagner Castro, Lexie Goldberger, Alexis Hunzinger, Kevin R. Barry, Sonia M. Kreidenweis, Greg M. McFarquhar, Lynn A. McMurdie, Mikhail Pekour, Heath Powers, David M. Romps, Celeste Saulo, Beat Schmid, Jason M. Tomlinson, Susan C. van den Heever, Alla Zelenyuk, Zhixiao Zhang, and Edward J. Zipser

Period (15 October 2018–30 April 2019), and a 1.5-month intensive observation period (IOP; 1 November–15 December 2018) that included Gulfstream-1 (G-1) aircraft flights. The campaign overlapped with the collaborating multi-agency, National Science Foundation (NSF)-led Remote Sensing of Electrification, Lightning, and Mesoscale/Microscale Processes with Adaptive Ground Observations (RELAMPAGO) field campaign [see companion article by Nesbitt et al. (2021) ]. The processes targeted by CACTI

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Stephen W. Nesbitt, Paola V. Salio, Eldo Ávila, Phillip Bitzer, Lawrence Carey, V. Chandrasekar, Wiebke Deierling, Francina Dominguez, Maria Eugenia Dillon, C. Marcelo Garcia, David Gochis, Steven Goodman, Deanna A. Hence, Karen A. Kosiba, Matthew R. Kumjian, Timothy Lang, Lorena Medina Luna, James Marquis, Robert Marshall, Lynn A. McMurdie, Ernani de Lima Nascimento, Kristen L. Rasmussen, Rita Roberts, Angela K. Rowe, Juan José Ruiz, Eliah F.M.T. São Sabbas, A. Celeste Saulo, Russ S. Schumacher, Yanina Garcia Skabar, Luiz Augusto Toledo Machado, Robert J. Trapp, Adam C. Varble, James Wilson, Joshua Wurman, Edward J. Zipser, Ivan Arias, Hernán Bechis, and Maxwell A. Grover

, mesoscale convective systems, multicell storms), and conceptual models of storm life cycle and life cycle transitions and their associated hazard probabilities, generated from U.S. storms consistent across global regions? How do proxies for severe storm frequency from satellites and large-scale models compare with detailed observations in severe storms, particularly in regions where the physical processes producing severe weather may differ? The answers to these questions ultimately impact our ability

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Matthew R. Kumjian, Rachel Gutierrez, Joshua S. Soderholm, Stephen W. Nesbitt, Paula Maldonado, Lorena Medina Luna, James Marquis, Kevin A. Bowley, Milagros Alvarez Imaz, and Paola Salio

environment of the supercell that produced the Vivian, South Dakota, hailstone (which registers as the world record for maximum dimension: 20 cm or 8 in.) and analyzed some of the storm’s radar characteristics. Their evaluation of the environment indicated that it was indeed supportive of severe convective storms, but it was not obviously supportive of such large hail as was observed. Other studies focused on radar observations of storms producing giant or gargantuan hail. Blair et al. (2011) compared

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