Unfortunately, if your case goes to warrant status, the warrant does not expire. There is no statute of limitations. But there are some things you can do to avoid getting a warrant assuming you don't already have one.
First if you are near the end of your probation, you can simply ask the court to terminate early so that you can move without any concern.
Also, many courts will allow you to serve your probation while living in another state, especially if your probation involves a misdemeanor charge and/or if you are on informal probation (i.e., you don't report to a probation officer, but you have to stay out of trouble or else you will be violated). Even if you are on formal probation with monthly reporting requirements, many courts will permit you to transfer your probation if you are otherwise doing what you are supposed to. The way to find out if your probation can be transferred is to ask the lawyer who represented you when you were first placed on probation.
If that lawyer is not available, and you are currently reporting to probation, then just ask the probation officer. If s/he says yes, make sure you get it in writing before you move and make sure you keep your probation officer aware of your current address.
If the PO does not know or can't make the decision on without the court's approval, then you will need to appear in court and ask the judge to modify the terms of probation so that you can live in Fla.
Obviously, if there is already a warrant and/or trouble with your PO and you decide to split, you may ultimately get arrested in Fla. There is no guarantee, but you it is not likely that OR will extradite you from Fla for a misdemeanor. You will sit in jail for several days in Fla while OR thinks it over.