The animation above shows the Nighttime Microphysics RGB (saved from the CSPP Geosphere site) over the islands of American Samoa. (An animated gif is available here). The annotated animation below highlights several features that are typical of convective development detection at night. Low clouds become apparent shortly before 1450 UTC (when they are circled); subsequent color changes in... Read More

On 14 November 2022, American Samoa (indeed, all the Samoan Islands) were withing deep moisture associated with the South Pacific Convergence Zone, a common occurrence. The animation of MIMIC Total Precipitable Water, above, shows the evolution of the moisture hourly from 0000 to 1200 UTC on 14 November. (MIMIC fields... Read More