Unlikely to have recent signs of persistent slabs and no shear test results.
Shear tests are class II and the presence of naturals overrides.
These were easier to answer without the terrain info.
The fact that rain is falling on 20 to 30 HN24 are the strongest factors together.
The events of the last 24 hours are significant alone, although they contribute strongly to the deep persistant slab issue.
Its unrealistic that a deep persistent slab would be 60 - 90cms below the surface when more than 60 fell in last 24. It can't be 'deep' persistent.
Assuming rain at lower elevations
I'm abit confused by signs of persistant slabs (24hr+) and no relivant signs of instability
X-country skiing anyone?

Caution surface hoar or overhead hazard. Otherwise favourable.
I would like to make a point here, also regarding the first 2 scenarios. There is a huge difference if a slope is 20 or 30 degrees, or in the first scenario 30 - 40 degrees. It takes a lot of unfavourable consitions to make a 20 degree slope slide, but you but it in the same category as a 30 degree slope. Also, I don't know any open slopes which are not exposed to sunlight and protected by any windtransport.
More info on the terrain trap would influence my decision
steep with a varaible snowpack
Steep with a terrain trap are the key features
oh my god... how much longer... i'm losing it.
slope angle is steeper and it would be very unfavourable
For deep slab instabilities, need to also know how the terrain is affected from above

Steepness is the overriding consideration. Very hard to trigger this slope if that's all I'm concerned about.
Having no field observations make these answers difficult.
info such as how easily the terrain trap is avoided would help.
The exposure to sunlight in these questions is obviously more of a factor mid-winter and later.
I have seen large deep slabs release on low angle terrain below 20 degrees in the alpine, so given this slope requires full commitment and has terrain traps - I don't like it :-)
something did not work. I assesed the slope as next assesment determinator before unfavorable.
Concave shape makes slope more favorable
I wouldn't expect a cross-loaded slope to be deep and uniform