The residents of American Samoa found themselves in the early morning hours of 20 November 2025, as strong maritime convection moved into the region. There is no radar in the area, so satellite observations are critical for operational awareness and nowcasting. The Band 13 infrared view on GOES-18 showed a... Read More
Heavy rains developed overnight over American Samoa, as depicted by the animation above from the CSPP Geosphere site. Low clouds — white/cyan in the RGB — start to show vertical development (that is, they get more and more red) shortly after 1000 UTC with more vigorous vertical growth apparent after 1100 UTC.... Read More
Night Microphysics RGB imagery over the Samoan Islands, above, saved from the CSPP Geosphere site, shows the characteristic color changes in the Night Microphysics RGB imagery from pink/salmon to dark red as lines of cumulus grow to thunderstorms. GREMLIN fields from the CIRA Slider, below, show the satellite-estimated MRMS fields. Rain starts... Read More
A selection of several GOES ABI loops during 2022 and 2023 showcased the diverse range of features observed, which included volcanic ash plumes, hurricanes, convection, fog, smoke, fires, dust and ice. It’s very hard to choose just one event from every month of the year, but the goal here is to show a variety of phenomena and locations that... Read More
