Yes. Most all warrants (felonies in particular) are entered into the NCIC (National Crime Information Center) Computer which is linked to all states and US territories and certain international locations. The data in this computer is routinely available to even the smallest police agencies. When your name is 'run' (even for a traffic stop) this info is readily accessible and you will be placed under arrest and held while the arresting state contacts your home state to start extradition procedures. However, it should be noted that states ARE NOT required to enter their warrants or to enter them nationwide, some states only enter their warrants into their state system and some agencies do not enter misdemeanor warrants at all.
Warrants don't "turn into" something different. When a warrant is issued it is either issued for a misdemeanor or a felony offense. It doesn't change.
If the offense you were found guilty of when you received your probation sentence was a felony, then your violation will be a felony warrant.
None. Once a warrant has been issued, it must be served or recalled. Until this happens, it will remain active.
is a bench warrant a felony
No. If you have been identified by name as the perpetrator/defendant and a warrant issued for you, the warrant (especially for a felony) will not expire unless withdrawn by the judge.
once the warrant has been issued it is active forever
No waiting: they can go straight to a judge and have a warrant issued.
sense its a felony charge it will stay active on your record til you can try to get it over turned. An arrest warrant is valid until it is served or recalled. The warrant is valid ("effective") until the person named in it is arrested or they convince the court that issued it to quash or recall it. People have been arrested on warrants that were issued many years before they were served.
Generally you can't check a database to see if someone has an arrest warrant active: you can only do this for yourself, and must call the Warrants bureau of the Sheriff's Office of the jurisdiction you think the warrant has been issued from. In Florida, if you have a felony warrant issued against you then you may be able to check a database at http://pas.fdle.state.fl.us/pas/pashome.a, a database of wanted and missing persons.
Warrants don't expire because they are issued by the court and only the court can cancel them.
No. The phrase"pocket warrant" generally means that the warrant is being held locally (i.e.: "in the Sheriffs pocket") and not entered into the nationwide system.
If you are speaking of them holding a warrant for you but you have, so far, avoided arrest - - they can hold it until the warrant is withdrawn or until the statute of limitations for your particular offense expires (if it does). If you are speaking of being held for extradition by KY for a felony warrant - - they can hold you until the state that issued the warrant comes for you.