Semi-official "Mt. St. Helens Webcam"
Mike... look in the crater slightly to the right of middle and you'll see the lava dome. Directly above the dome is a plume of steam... but look there and there are two large pale features.... they're either yellow (sulphur) or light brown.
I don't think they were there before.
I don't think they were there before.
I believe the dome is pushing outward more; the apparent difference is just a change in how the light hits it moreso than being a new feature. 
I am having a hard time comparing because all my pictures have snow in them.

I am having a hard time comparing because all my pictures have snow in them.







