Pineapple Express

The Pineapple Express is a meteorological phenomenon characterized by a strong, persistent flow of atmospheric moisture and warm, humid air originating from the tropical Pacific near Hawaii (hence "Pineapple") and targeting the west coast of North America. This stream of moisture often leads to heavy rainfall, especially in California and surrounding regions, causing floods and landslides. It typically occurs during winter and can last several days, significantly impacting local weather patterns. The term also gained popularity through the 2011 comedy film, but meteorologically, it describes this specific atmospheric river.