Are they open on Thanksgiving?

Yes

Only until 3 p.m WinCo only closes for Thanksgiving day early, and Christmas eve at 6ish for Christmas day.

Yes they are untiil 3

Fred Meyer is open that day until 4pm and open at 5am on Black Friday.

I saw a sign that said they're open until 3 p.m. and close until 7 a.m. the next day.