1-minute Mesoscale Domain Sector GOES-18 (GOES-West) Infrared Window and Visible images (above) showed Tropical Storm Lala as it intensified to become a Category 1 Hurricane at 1900 UTC on 15 August 2026 (GOES-18 images | NHC advisory) south of the Big Island of Hawaii. Lala exhibited a rather ragged eye that remained... Read More
1-minute Mesoscale Domain Sector GOES-18 (GOES-West) Visible images (above) and Infrared Window images (below) showed the slow organization of cloud features associated with Tropical Storm Lala southeast of Hawai’i on 13 August 2026. Overlays of GOES-18 GLM Flash Points indicated that lightning activity was sparse during that time period. Lala was moving... Read More
1-minute Mesoscale Domain Sector GOES-19 (GOES-Eas)t Visible images (above) showed Hurricane Genevieve as it was rapidly intensifying to become a Category 4 storm on 26 July 2026. Low-altitude mesovorticies were very apparent within the eye — and GLM Flash Points depicted intermittent lightning activity within the eyewall of the hurricane.The... Read More
1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Visible images (above) and Infrared Window images (below) showed clusters of thunderstorms that produced hail as large as 2.50″ in diameter and wind gusts as high as 92 mph (SPC Storm Reports) across parts of South Dakota on 25 July 2026. Pulses of overshooting tops exhibited infrared brightness... Read More
