This happens in my family all the time.

I had a dream with my aunt. She was in an all white dress in a field waving goodbye at me and she was yelling stuff at me but I couldn't quite make it out. I was trying to get to her, but I couldn't get past a fence even though it was like 2 feet tall and I could easily jump over it. It felt like it was a goodbye. After a while I stopped trying to understand and get to her, and just waved goodbye, then the dream ended.

I woke up and wrote my dream down and went on with my day. It wasn't until later l found out she had passed away. I was like 10 and at that time and I was very scared, so I didn't tell my mom about my dream until years later. She told me that happens often in my family

I don't necessarily believe in the supernatural either, but some things I don't think can be explained. Like if it happens once I get it, but this has happened multiple times. I've seen my brother wake up from a dream and tell us about how he said goodbye to a family member only to right then and there find out they had passed away. I cannot explain it