noise as your source (blue noise if you can get a generator (I made one in reaktor, so you should be able to do the same, it is simply an inverted pink noise profile, a +3db boost in energy for each octave that it rises), otherwise white)
adsr on the filter to make it grow and growl - 3-5-2-6
adsr on the resonance of the filter as separate control - 4-2-4-1
a little lfo also modulating the filter cutoff and the resonance, maybe even 2 or 3 lfo's that are not synched up running at different slow rates - this will cause the wild circling howling you are looking for
an adsr on the vca as well to control the overall sound - 3-3-5-4 and a little lfo as well just to mix it up a bit