I held back from posting about the potentials for storms on Saturday for quite a bit. Models were chopping and changing. BoM originally thought Friday was a Storm day earlier on in the week, then they said Saturday for the last 4 days.
It is not a great looking setup, but when you break it all down, there is definitely potential for storms and possibly severe.
( PS, I went to post this last night, Thursday and just ran out of time.)

What I have done, is I took the Soundings from Brisbane, Dalby, Kingaroy, Warwick and Moree and broke them down to get a broad perspective of the atmosphere. Below is the values in each of the Soundings



The break down of all of this with a quick technical update for Saturday (18 Oct). GFS-based soundings for Brisbane / Dalby / Kingaroy / Warwick / Moree show a conditionally unstable environment: modest–moderate CAPE (≈200–400 J/kg in many locations), small-to-modest CIN, and modest deep-layer shear (~20–30 kt).

Precipitable water is only low–moderate (mid 20s mm), and several soundings have relatively dry mid-levels.
That combination favours strong updrafts with efficient hail growth and evaporative downdrafts — so the primary risks (if storms develop) are hail and damaging wind gusts rather than long-duration heavy rain.

The key uncertainty is low-level moisture and timing. Models generally keep dew points on the low side; if surface moisture is greater than models indicate (i.e., dew points climb toward the high teens) and a trigger (front, trough, or convergence) lines up at the right time, storms could intensify quickly and produce severe cells.

Once again it is not your textbook widespread severe outbreak, but a conditional, pulse/semi-organised severe threat — the main watch is lower level moisture dewpoints) increase and timing of trough. I’ll update either Friday or Saturday morning when the actual Soundings are released.

So basically with the forecast conditions, storms could pop up quickly and a few may produce large hail and strong gusts if the everything slides into place. All the models have the Trough moving over at different times in the afternoon so that creates some uncertainty.

So as per always, these are my thoughts and anything can change rapidly. So keep an eye to the sky and on the radar and listen for any warnings if storms develop and become severe. — timing and local moisture will decide how it plays out.