It's Brawl in the Family RWBY : Season 3 Episode 3

Starting the last episode ends, Ruby follows Weiss as she races across Vale to greet a woman who turns out to be Weiss's older sister, Winter. As the sisters begin their journey back to the school, they're interrupted when a drunkard picks a fight with Winter. He turns out to be Ruby's uncle, Qrow. Awesome fight and property damage ensue, until it's broken up when Ironwood shows up followed by Ozpin and Glynda. Later, Qrow, Ironwood, Glynda, and Ozpin have a meeting where a lot of harsh words ensue.