To get a noise that loud it sounds like you have a split hose or a loose jubilee clip on one of the hoses. Have a good nosey around in the engine bay with the engine running and see if you can isolate where its coming from.

Cheap tyres wont help matters and certainly wont do the handling of the car any justice in this weather. Even with good tyres you do get a fair bit of road noise as none of the arch liners are carpetted so you will hear just about everything and as stated it can make it hard to guage wether bearings are on their way out. Only sure way iss to get it off the ground and check each wheel one at a time.

Rich