Impressed by the bullshittiness of Arizona's laws. Possession anywhere up to 2 lbs is a felony 6 months-2 years. Max fine $150k. Fuck that place. Although it'd be lovely to grow there.
You'll probably get probation. But there's no caveat that under an ounce gets treated differently then over an ounce.
This is a poor place to get legal advice. If you haven't talked to a lawyer do so it's free. If you can't afford one the state of Arizona would be delighted to give you one on loan. You'll be paying them back when you're convicted and fined.
For a rundown of the Arizona penal system, what it does to society, and the rampant recidivism that goes on there I recommend the movie Raising Arizona.