Close Happy National Mousse Day! Happy National Mousse Day! Here to celebrate with us is Bakery Nouveau's William Leaman. Leaman is going to demonstrate how to whip up a delicious chocolate mousse. wsts2 12:10 PM. PST November 30, 2016 More Stories What's next: More snow expected Thursday Dec. 6, 2016, 8:38 p.m. ISP to drivers after snow blankets Treasure Valley:… Dec. 6, 2016, 3:27 p.m. Skiers, snowboarders flock to Snoqualmie Pass for… Dec. 6, 2016, 7:25 p.m.