Will they arrest you? Probably not -- but you never know.
The above information does not establish an attorney client relationship nor is it meant to provide legal advice.
Where I practice you would probably be arrested if you show up and there's an outstanding warrant. You can minimize the chances of this by having a good truthful excuse and an attorney with you. Excuses that don't work: 1) I forgot; 2) my bus was late 3) there was too much traffic 4) I slept late 5) because my alarm clock didn't go off or 6) I forgot to set it. This is jus a short list; I have heard hundreds of excuses that landed someone in jail.