GOES-18 imagery over California at 1836 UTC (above, left) show a very strong signal over San Luis Obispo County: very bright in visible imagery and warm in the shortwave infrared. In the GOES-16 imagery, that signal is not present. In contrast, the warm signal in the shortwave infrared in GOES-18... Read More
1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Clean” Infrared Window (10.3 µm) images (above) displayed areas of convection that moved across the islands of American Samoa on 12 June 2024 (1-minute imagery was requested by NWS Pago Pago to monitor the approach of thunderstorms capable of producing heavy rainfall and potential flooding — and since they lack radar coverage, 1-minute satellite... Read More
1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Red” Visible (0.64 µm) images (above) showed areas of bright sun glint off the open (ice-free) water in the Chukchi Sea — just off the coast of Alaska, from the Bering Strait to near Utqiagvik (formerly Barrow) — around 1 AM local time on 08 June 2024.... Read More
A period of high-based convection to the east and northeast of Hawaii was producing occasional lighting on 3 June 2024, as shown in the animation above. LightningCast Probabilities plotted show values around 50%, and lightning is occurring. Note that the Flash Extent Density colorbar has been modified to have a... Read More
