Blanket or not to blanket - incoming Arctic Blast

I am in Michigan and we have this crazy cold front coming in with severe wind chills well into the negatives. I am on the fence whether to blanket my horse. He came from North Dakota so a much colder state but that was back in 2023. He is half fjord and half friesian. He has a nice coat on him and they all have hay 24/7. I texted my boarder and his breeder but I’m paranoid. What would you guys do?