Weather Blog Caving Clouds Airplanes passing through supercooled water droplets cause cavum, or hole-punch clouds. Read More… About Author See author's posts Post navigation Previous London Christmas Day weather forecast as Met Office predicts surprisingly warm festive periodNext Salt Pans of Salin-de-Giraud Related Stories Minute Man National Historical Park Weather Blog Minute Man National Historical Park July 1, 2026 A Most “Pleasantly Situated” Estate Weather Blog A Most “Pleasantly Situated” Estate June 30, 2026 Viking Mission Resources Weather Blog Viking Mission Resources June 30, 2026