  Coronal Mass Ejections (CMEs) are immense eruptions of plasma and magnetic
fields that are propelled outward from the Sun, sometimes with velocities
greater than 2000 km/s. They are responsible for some of the most severe space
weather at Earth, including geomagnetic storms and solar energetic particle
(SEP) events. We have developed CORHEL-CME, an interactive tool that allows
non-expert users to routinely model multiple CMEs in a realistic coronal and
heliospheric environment. The tool features a web-based user interface that
allows the user to select a time period of interest, and employs RBSL flux
ropes to create stable and unstable pre-eruptive configurations within a
background global magnetic field. The properties of these configurations can
first be explored in a zero-beta magnetohydrodynamic (MHD) model, followed by
complete CME simulations in thermodynamic MHD, with propagation out to 1 AU. We
describe design features of the interface and computations, including the
innovations required to efficiently compute results on practical timescales
with moderate computational resources. CORHEL-CME is now implemented at NASA's
Community Coordinated Modeling Center (CCMC) using NASA Amazon Web Services
(AWS). It will be available to the public by the time this paper is published.
