Love the idea but (I fly Gliders and Hang Gliders) but the implementation is not great. It looks more like a plot of cloud cover and not clear what the numbers mean. There are 3 things which would be useful on this plot
Height of convection (Ft ASL/AGL)
best expected strength of convection (Ft/min)
That would be useful. If you want to see what good looks like have a look at the RASP forecast website.
Nice site overall through, I use it all the time for general forecasts and love the Site Alerts.