Yeah...it's seasonal weather gets pretty intense sometimes, fortunately it cuts both ways though. I have gone there when fire was in season and had it run for 30-40 minutes a pop on back to back days.

I imagine that's one of the key points to the frustration people have when trying to farm specific rocks--you can have the perfect conditions to farm a buttload of them, but the artificial chokehold they've put on the drop rate screws you over.