Weather Blog Retreat at Petermann Glacier Decades of retreat are visible from above, but harder-to-see changes below the waterline could also affect this iconic glacier’s future. Read More… About Author OTW Observer See author's posts Post navigation Previous Flooding Likely this Weekend!Next Caribbean Flood Alert Right Now! Related Stories Tropical Storm Arthur Weather Blog Tropical Storm Arthur June 19, 2026 Desert Field Test With NASA Advanced Rover Prototype Weather Blog Desert Field Test With NASA Advanced Rover Prototype June 18, 2026 El Niño Is Underway Weather Blog El Niño Is Underway June 18, 2026