ZMBUCKS is correct. I heard on the radio this morning that we (the public) may not know anything until Monday.
He has to inform the NFL today. That decision will not be made public by anyone, other than Cardale. He then has 72 hours to withdraw his name from draft consideration - provided he decides to put in for the draft today. In other words, he can choose the NFL today, keep it hush-hush to the public, and take 3 extra days to make a final decision.
If he decides to stay, we'll know something today. If he decides to leave, I suspect we won't know anything for sure until Monday.