Weather Blog Making Sense of Holes in the Clouds Scientists speculated about these holes for decades, but it’s now well understood that cavum clouds are caused by airplanes. Read More… About Author See author's posts Post navigation Previous Flood alerts issued across London as Met Office shares weather warningNext Erupting Volcano causes Yellow Alert… Related Stories Rings of Rock in the Sahara Weather Blog Rings of Rock in the Sahara November 28, 2025 Cranberry Country, Wisconsin Weather Blog Cranberry Country, Wisconsin November 27, 2025 The Towers of Tràng An Weather Blog The Towers of Tràng An November 26, 2025
