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. 2020 ). Thus, an adequate representation of WCBs is desirable in NWP and climate models. First introduced by Browning et al. (1973) and Harrold (1973) , WCBs are defined as cyclone-relative airstreams that ascend from the planetary boundary layer to the upper troposphere along vertically sloping isentropic surfaces. Assuming the absence of nonconservative forces, early studies identified WCBs using cyclone-relative streamlines on a wet-bulb potential temperature surface (e.g., Harrold 1973
. 2020 ). Thus, an adequate representation of WCBs is desirable in NWP and climate models. First introduced by Browning et al. (1973) and Harrold (1973) , WCBs are defined as cyclone-relative airstreams that ascend from the planetary boundary layer to the upper troposphere along vertically sloping isentropic surfaces. Assuming the absence of nonconservative forces, early studies identified WCBs using cyclone-relative streamlines on a wet-bulb potential temperature surface (e.g., Harrold 1973
