Tire story

Hey guys.
So my Dad comes over for Thanksgiving and tells me one of my winter tires for my F150 that I have stored at his house exploded. I laughed it off thinking he was joking, so he starts laughing and says hound so we go over to check it out.
I could not believe it when I saw it lol.
I rolled these tires into his house this spring they where great condition, not overinflated, stored in a nice cool locked location.
Anyone ever have this happen?
They are Toyo Open County .
I dont feel safe replacing and running the other 3.

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Doesn't matter what they look like. What is the DOT date code?
I will look tomorrow.