So here are my thoughts on the thunder chances tonight:
Cascades seem like the best bet, though with the Altocumulus in the WV, that does tell me the atmosphere is primed for something elevated if there is a trigger. I think if there is one west of the Cascades, it will be one cell.
Puget Sound could see something but again, I see this being a higher chance in the Cascades, and later as well.b
4/10 will have been a lot better than this.