Switch definitely on now, strong mid level trough is moving in from the west, will be over Victoria tomorrow.
Then it gets help up somewhat and cradled over us for most of the coming week.
Given the air is so dry through the interior this makes large hail a very big risk.
Here are the latest CAPE values forecast, showing the unstable air mass creeping closer and peaking Monday through Thursday
CAPE is the Convective available Potential Energy, a measure of instability in the atmosphere, above 500 is enough for weak storms, but generally above 1000 is decent instability and will provide decent activity.
Light NE flow as well so a little bit of moisture will be pumped in increasing our chances for a decent storm outbreak.
Also given the drier air than in the past we could get quite isolated cells good for viewing.