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 Surveying Popes Creek Weather Blog Surveying Popes Creek February 16, 2026 Stonebreen’s Beating Heart Weather Blog Stonebreen’s Beating Heart February 13, 2026 Reaching Top Speed in the Dolomites Weather Blog Reaching Top Speed in the Dolomites February 12, 2026
