2.5-minute Target Sector JMA Himawari-9 AHI Infrared images (above) showed Cyclone Narelle after it had rapidly intensified to a 115 kt Category 4 storm (JTWC discussion | ADT | SATCON) off the coast of Western Australia on 26 March 2026. As Narelle moved southwestward toward the Exmouth Peninsula, it weakened slightly... Read More

2.5-minute Target Sector JMA Himawari-9 AHI Infrared images (above) showed Cyclone Narelle as it was rapidly intensifying over the Coral Sea on 18 March 2026 — becoming a Category 2 storm by 1200 UTC, a Category 3 storm by 1800 UTC and a Category 4 storm by 0000 UTC (ADT... Read More

1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible and Infrared images (above) showed Hurricane Imelda as it intensified from a Category 1 to a Category 2 storm (at 1800 UTC) while approaching Bermuda on 01 October 2025. GLM Flash Points revealed very little satellite-detected lightning activity within the eyewall of Imelda.About an hour prior... Read More

1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible images (above) showed Hurricane Humberto as it intensified from a Category 4 to a Category 5 storm on 27 September 2025 (Humberto became the second Category 5 storm in the Atlantic Basin this season — with Erin being the first). Low-altitude mesovortices were evident within... Read More