 After the study of squall lines his interest returned to supercells from the microphysical aspects of cloud particles to mesoscale environments modulating storm behavior.He was the field commander (FC) of Project VORTEX in 1994-1995 where he worked with lead forecaster Charles A. Doswell III, participated in SUB-VORTEX and VORTEX-99, STEPS, IHOP, and served on the steering committee and was a lead principal investigator (PI) for VORTEX2 in 2009-2010 as well as project manager for VORTEX-SE in 2016-2017.Since his college days Rasmussen was a major contributor to "Storm Track" magazine although by the mid-1990s his previously intense interest in storm chasing was waning.