My 2005 Honda Odyssey sounds sick

My Odyssey has 110,000 miles but since about 50,000 miles (I can’t exactly remember) it makes a loud wining sound from the engine when I slow down, gets louder when I turn a corner, like going into a parking spot. The problem is it comes and goes and I can’t seem to pin point what kind of weather or other conditions make it happen.

The sound is related to your power steering pump. It seems to come and go because you turn while the engine is at high or midrange or low rpm’s. Turning into a parking spot, your motor is just about idling, and you are turning the wheels with low fluid.
Check and fill the power steering fluid according to your car’s manual.