Possession of marijuana carries a one year jail penalty, along with up to two years of probation, loss of driver's license, extensive alcohol and drug testing and a number of other penalties.
If you're a first offender, you may have the opportunity to keep this offense off of your record, and avoid jail, but it comes down to how proactive you're willing to be, and if you're willing to be an exceptional person on my proactive program. I would be happy to discuss my program, and how it can help you reach your goals.