Overlapping 1-minute Mesoscale Domain Sectors provided 30-second interval GOES-16 (GOES-East) “Red” Visible (0.64 µm) images (above) — which showed thunderstorms that produced tornadoes, large hail (up to 4.4 inches in diameter) and damaging winds (SPC Storm Reports) across western Oklahoma on 30 April 2024. Pulses of overshooting tops and evidence of Above-Anvil Cirrus Plumes (reference | VISIT training | blog posts) were... Read More

12 days after its powerful eruption on 17 April, 10-minute JMA Himawari-9 AHI Infrared Window (10.4 µm) images (above) showed another explosive eruption of Mount Ruang in Indonesia on 29 April 2024. The coldest cloud-top infrared brightness temperatures reached -90ºC (internal yellow pixels) at 1850 UTC, shortly after eruption onset. Note that the volcanic umbrella cloud exhibited concentric... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) Visible/Infrared Sandwich RGB images (above) showed thunderstorms that produced tornadoes, large hail and damaging winds (SPC Storm Reports) across eastern Nebraska and western Iowa on 26 April 2024.1-minute GOES-16 Visible/Infrared Sandwich RGB images with an overlay of GLM Flash Extent Density (below) showed the lightning activity associated with this convection — which included some notable lightning jumps as tornadic thunderstorms moved through the... Read More

High Pressure over the Great Lakes on 25 April meant a spectacular true-color view of the 5 Great Lakes (apologies to Lake Champlain) by the VIIRS instruments on NOAA-20. A similar view was recorded at 1755 UTC by Suomi-NPP, shown below.Clear skies also meant a determination of Lake Surface Temperatures, shown below (compare these to Monday,... Read More