Why does my husky scream at 3am??? I need sleep

I love my husky Luna to death but she has started this thing where she wakes up at 3am and just... screams. Not barking, that weird husky yelling thing.

She's 2 years old, gets plenty of exercise (we run 3 miles every morning), has food and water available. Nothing has changed in our routine.

Is she just being dramatic or should I be worried? My neighbors are going to hate me soon.

Husky owners please tell me this is normal husky nonsense and not a health issue.