China is notorious for having very thick, tall, and saturated thermodynamic profiles, which prevent massive hail. However, the kinematic support is rarely dynamic, with the turning of the winds resulting in increased streamwise vorticity at the surface being the main kicker for tornadogenesis. The lack of kinematic support to vent away some precipitation and the extremely saturated nature of the profile serves to create a massive high-precipitation nightmare. Almost all of their worst tornadoes have come from this type of supercell (Tianjin 1969, Funing 2016). However, there are some rare exceptions further north, where moisture return isn't as plentiful (Kaiyuan 2019).
Here is an example with a long-tracked EF3 Tornado near Suzhou in Anhui Province on July 22, 2020
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The Kaiyuan Tornado environment (top of the two soundings below) was quite unusual in how there was an inversion at the surface, yet the supercell was still able to become surface-based. This is eerily similar to the environment that the 2004 Marion Tornado was working with (bottom of the two soundings below), as both exhibited classic northwest-flow kinematics and that surface inversion. I'm not sure how these supercells were able to become surface-based, but the inversion was the reason for the very tall nature of both the Kaiyuan and Marion Tornadoes. Liaoning Province is in northern China, not far from the Koreas, functioning just like the high-plains we see here in the USA. That tornado was just proof of China's "High Plains" Tornado season.
Kaiyuan Tornado Sounding
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Marion Tornado Sounding (observations confirmed the existence of an inversion, which ERA5 missed, but SHARPpy is not allowing me to get that sounding up at the moment, will post later)
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The Kaiyuan Supercell and Marion Supercell on radar, both showing classic northwest flow characteristics.
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