If someone threatens to kill you then you have every right to go to the police. Many abuse victims don't get adequate support or intervention -for various reasons (fear being one of them).
It is not OK for your father to treat you, or your mother or sisters, this way.
I personally believe, at this point, that it is a police matter. Other options would be to try woman's refuge or your local mental health services for support/ advice.
"Sticking it out," while understandable is not good advice.
It sounds like your father's behavior may be escalating so the best advice I can give is to do something about it now. That would entail going through a system (and not confronting him directly).
You could also try staying at a friends in the interim. That won't change your family situation though. If you need support try asking a trusted adult (preferably one that will see the situation for what it is and act accordingly).
Take care and good luck.
You have already received excellent advice on this matter..I concur with both of them. I can only add that you MUST get help from some responsible adult, and you have to choose which one..it could be a teacher, an aunt or uncle or other family member, or a protection agency in your community...but it does not sound like you can ignore this if you feel you are in danger and your father is out of control.
Maybe I over-reacted but many people in abusive families get injured or killed.
Many family members can feel threatened but ignore the problem. There was a recent case in the media where an ex was abusive and controlling. His girlfriend left him and he stabbed her over 200 times and mutilated her. The advice they gave the public for abusive relationships was to seek help.
Abusive environments can often be made to seem sugar-coated and this can be extremely confusing.
If it doesn't feel safe to you then most likely it isn't.
I wonder why your father needs to control people like this?
Are you in school still? If you are try speaking with a school counselor. If you speak with them honestly, they are under obligation to investigate. IT IS NOT OK to be abused. Perhaps your mother is afraid to say something because she doesn't want anything to happen to her husband. It is scary, but if left unsaid you or your mother will be the ones to get hurt. PLEASE SEEK THE PROPER HELP YOU NEED. There are ways of being discreet. Perhaps when over a friend's house you can also talk to the police. They should understand the need of being discreet.
It is also not your responsibility to protect your parent, it is their 's to protect you. GET HELP!!