Lend me a heavy winter jacket or coat?

OK, I'm going to Yosemite. I don't own a really warm jacket or coat with windbreaking/water-resisting properties. I'm not concerned about style or color -- just warmth and dryness. Anyone have something they can lend me for nine days?

(I'll probably find something in a thrift shop, but I'd like to have a backup, just in case.)

I had no idea I could.

I just exploded a stick of butter in the microwave. I mean, like,

BOOM!

and now the whole inside of the microwave is yellow.