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
Widespread clouds can easily hide the location of active precipitation. When that happens, well-timed microwave information can show where precipitation is most likely. In the slider example above, Aqua MODIS infrared imagery with a grey-scaled enhancement (collected over Guam just before 0350 UTC on 9 July) shows regions of convection west and south of Guam (circled in yellow). Where are the heaviest rains located, and... Read More
NASA Worldview imagery of Terra (launched in 1999 and still producing imagery!) MODIS true-color imagery, above, from this link, shows an ellipsoidal feature to the southeast of Guam with cloud development along its southern flank. Terra was passing west of Guam at about 0045 UTC on 20 May 2023, with the... Read More
The Himawari-9 Target sector monitored the evolution of Typhoon Mawar from its inception. The animation above (it re-centers occasionally) shows the initial intensification of the system, a brief but notable weakening just prior to moving close to Guam, and then reintensification to the west-northwest of the Marianas. The animation... Read More
