Does the car only make the noise when turning the wheel? Does it do it sitting still and turning the wheel or does the car have to be in motion?
My best guess is there is a problem with a wheel bearing. This can be repaired at service place and doesn't take too long. Depending on how far gone the bearing is would depend on if you should drive it or not. I would get it in right away and have it checked as it can get serious if you don't and break down on you and leave you sitting.