GOES-18 (GOES-West) SO2 RGB and Ash RGB images (above) showed the northeastward drift of a volcanic cloud produced by an eruption of Mount Shishaldin that began shortly before 0730 UTC on 23 July 2023. The initial (higher-altitude) portion of the volcanic cloud likely contained moderate concentrations of SO2 (denoted by brighter shades of yellow in the SO2 RGB images)... Read More

GOES-18 (GOES-West) Day Land Cloud Fire RGB, Shortwave Infrared (3.9 µm), “Clean” Infrared Window (10.3 µm) and Visible images with an overlay of the Fire Power derived product — Fire Power is a component of the GOES Fire Detection and Characterization Algorithm FDCA — (above) showed thermal signatures associated with a wildfire that produced a pair of pyrocumulonimbus (pyroCb)... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) images (above) showed a supercell thunderstorm that produced a tornado, hail as large as 5.00 inches in diameter and wind gusts to 100 mph (SPC Storm Reports | NWS Aberdeen summary) in central South Dakota during the late afternoon and early evening hours on 18 July 2023. Several pulses of overshooting tops... Read More

Following the eruption on 14 July, another explosive eruption of Mount Shishaldin began just before 0530 UTC on 16 July 2023 — radiometrically-retrieved GOES-18 (GOES-West) Ash Loading (above) and Ash Height (below) products from the NOAA/CIMSS Volcanic Cloud Monitoring site indicated moderate to high amounts of ash loading, existing at heights within the 4-10... Read More