It is fairly hard to get completely calm winds in most places in the US. Unlike places like Europe, we have winds coming from multiple directions. The chances of getting calm winds in pretty slim so that is why they had to get off the ground yesterday. They were saying it would be windy for the rest of the week.
No jumping today either.
I don't know how's the weather usually in that area, but it seems to me that getting slow stable winds all through the balloon inflation, launch and ascension is going to be like a lottery.