Editing Mesocyclone (section)

==Mesoscale convective vortex==
{{Main|Mesoscale convective vortex}}
A [[mesoscale convective vortex]] (MCV), also known as a mesoscale vorticity center or Neddy eddy,<ref name="cimss"/> is a mesocyclone within a [[mesoscale convective system]] (MCS) that pulls winds into a circling pattern, or vortex, at the mid levels of the [[troposphere]] and is normally associated with anticyclonic outflow aloft, with a region of aeronautically troublesome [[wind shear]] between the upper and lower air. With a core only {{convert|30 to 60|mi}} wide and {{convert|1 to 3|mi}} deep, an MCV is often overlooked in standard [[weather map]]s. MCVs can persist for up to two days after its parent mesoscale convective system has dissipated.<ref name="cimss"/>

The orphaned MCV can become the seed of the next thunderstorm outbreak. An MCV that moves into tropical waters, such as the Gulf of Mexico, can serve as the nucleus for a [[tropical cyclone]]. An example of this was [[Hurricane Barry (2019)|Hurricane Barry]] in [[2019 Atlantic hurricane season|2019]]. MCVs can produce very large wind storms; sometimes winds can reach over {{convert|100|mph}}. The [[May 2009 Southern Midwest Derecho]] was an extreme progressive [[derecho]] and mesoscale convective vortex event that struck southeastern Kansas, southern Missouri, and southwestern Illinois on 8&nbsp;May 2009.