If you haven't already used up the 21-day trial time, I can recommend
http://www.grlevelx.com/.
It's a great tool to watch radar data and follow outbreaks, including vortex icons and warnings. GR2Analyst also features a 3D-volume explorer to show t-storms in 3D.
Each one of the three versions comes with a 21 day trial demo version to test it out.