No probs...
These automated weather stations are great, but only if one knows the limitations of them.
A human observer may include VCTS in the metar just by looking out of the window. Just because the automated station does not include this code, it doesn't mean that there aren't thunderstorms about (unless coded thus).
As with any weather source, it is not enough just to be able to read the source...you need to know how and when it was collected too!
cl12pv2s