Being cautious about thunderstorm forecasts and emphasising any significant uncertainties can really pay dividends when not all the stars are aligned.

The 3pm satpic above via Weatherzone shows the localised showers & thunderstorms that formed in parts of SE QLD and moved in an E to ENE direction.

Apart from some potential inhibiting effect from the morning cloud mentioned in yesterday’s post, data from this morning's observed sounding from Brisbane Airport also showed a noticeable temperature inversion in the middle levels of the atmosphere (see 1st image above).
This is likely to be one of the significant factors in keeping shower/storm activity fairly localised. The general “flattening out” type of visual appearance of some of the towering cumulus clouds on webcams as they try to grow taller looks consistent with that.