Weather the Storm Storm Count: Opponent casts (only) 1 Sprout Swarm with buyback, followed by Weather the Storm, and gained 9, not 6, life.
It appears Weather the Storm considers buyback costs an additional spell, not the cost of an existing spell, like Sprout Swarm. In Turn 11, at 11:07 AM EST of the Event, the observer can see the only two spells cast that turn were Sprout Swarm with buyback, and Weather the Storm. This would give a Storm Count of 2, gaining my opponent 3 times 2 Storm Count = 6, not 9 life. I think this is an error.