1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible, Water Vapor and Infrared images (above) showed the development of vertically-propagating standing wave clouds over far northeastern South Dakota on 28 March 2026 — initiated by strong SW winds interacting with the topography of the Coteau des Prairies.The coldest cloud-top infrared brightness temperatures of the standing wave cloud... Read More

During the day of 27 March 2026, a band of strong strorms propagated from north of the Samoan islands southward to the island themselves. These storm were notable for deep convection and strong environmental instability and were the cause of flood warnings across American Samoa. A good first look at... Read More