vorticity is a meteorological parameter, a measure of cyclonic spin.
vort, vortex, or vortmax all refer to a localized center or maximum of cyclonic spin (vorticity).
vortices is the plural of vortex.
vortice and vorticy are words that don't exist.
Using the phrase "The model is showing a vorticity" is analogous to saying it's showing"a moisture".
Either the model is showing a (1) vortex, (2) vortmax, or (3) vort (shorthand for 1 and 2) or it is showing an area of vorticity
Carry on...
