Suomi NPP overflew Tropical Storm Calvin to the east of Hawai’i at around 1136 UTC on 18 July. Data downloaded from the NODD, and processed by Polar2Grid (version 3.0), show the storm in very low light conditions, above. Calvin is moving rapidly westward towards Hawai’i, and interests in that state... Read More
GOES-18 data above show persistent convection around Samoa and American Samoa between 0400 and 0730 UTC. Sentinel-1A overflew the region just after 0550 UTC, yielding information about wind features. At that time, a convective storm was developing in between Tutuila and Upolu. The animation below steps through the Band 13... Read More
The presence of three JPSS satellites — Suomi NPP, NOAA-20 and NOAA-21 — allows for animations at high resolution (I01 imagery on VIIRS has 375-m resolution) at even low latitudes. The animation over the island of Guam (at 13.4oN) shows the evolution of clouds between 0246 and 0358 UTC on... 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
