The name “Gelée Noire” (French for “Black Frost”) refers to the midwinter frost. Despite the mounds, the cold can occasionally be so severe that the vine itself can burst and the buds freeze. This is how the Bordeaux vineyard, the Saint-Emilion vineyard, and especially the Pomerol vineyard all experienced serious disasters in the month of February 1956. Numerous vines were killed by the extremely cold (-25°C) weather that followed a string of chilly days.