1-minute Mesoscale Domain Sector GOES-17 (GOES-West) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images (above) showed the formation of Hurricane Douglas — the first hurricane of the 2020 season in the East Pacific Ocean — on 22 July 2020. Douglas was the 4th latest formation of the first hurricane on record in this... Read More

  The main modern Mount St. Helens eruption was May 18, 1980 — yet there were also later paroxysmal eruptions, such as on June 12/13, 1980. Geostationary satellite imagery from NASA’s SMS-2 (Synchronous Meteorological Satellite) monitored two more Mount St. Helens eruptions on July 22th (local time), 1980, as shown above. Note that in... Read More

1-minute Mesoscale Domain Sector GOES-16 (GOES-East) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.35 µm) images — with and without an overlay of GLM Flash Extent Density (above) — showed the development of a large Mesoscale Convective System (MCS) that developed over North Dakota and began moving eastward into Minnesota on 17 July 2020 (surface analyses). These thunderstorms produced... Read More

As a Mesoscale Convective System (MCS) over Kansas and Oklahoma decayed during the morning hours of 16 July 2020, GOES-16 (GOES-East) “Clean” Infrared Window (10.35 µm) and Near-Infrared “Cirrus” (1.38 µm) images (above) depicted widespread transverse banding — tendrils of cirrus clouds oriented perpendicular to the upper-tropospheric wind flow — along the northern periphery of the MCS.... Read More