Would throwing an improvised weapon, like table leg, use Str or Dex for the attack roll?

@JeremyECrawford Would throwing an improvised weapon, like a bar of soap or table leg, use Str or Dex for the attack roll?

— Warren (@whardison) November 20, 2016

Which ability modifier do you use with an attack roll and its damage roll? See the Sage Advice Compendium: https://t.co/dh02JRnEH8 #DnD https://t.co/C3ERkIImX7

— Jeremy Crawford (@JeremyECrawford) November 22, 2016