This article is about the Harry Potter and the Half-Blood Prince moment. For the Harry Potter and the Deathly Hallows moment, see Splinched (The Deathly Hallows).
The snow melted around the school as February arrived, to be replaced by cold, dreary wetness. Purplish-grey clouds hung low over the castle and a constant fall of chilly rain made the lawns slippery and muddy. The upshot of this was that the sixth-years' first Apparition lesson, which was scheduled for a Saturday morning so that no normal lessons would be missed, took place in the Great Hall instead of in the grounds