Pacific Hurricane Calvin was sampled by Radar Constellation Mission #3 (RCM-3) shortly after 0200 UTC on 14 July 2023. The SAR winds (click here to access a JAOTech article on this subject!) show strong winds surrounding a not-quite-circular closed eye, with a region of strong winds extending in a curved... Read More

The third named storm of the Eastern Pacific tropical season has formed. (Click here for NHC‘s public advisory on the naming of Calvin) The mp4 animation above (click here for an animated gif) shows the evolution of the system for the 24 hours ending at 1210 UTC on 12 July... 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

1-minute Mesoscale Domain Sector GOES-18 (GOES-West) “Red” Visible (0.64 µm) and “Clean” Infrared Window (10.3 µm) images (above) showed Category 1 Hurricane Beatriz just off the west coast of Mexico (near Ixtapa, station identifier MMZH) as a cloud-filled eye was becoming more apparent.A DMSP-17 Microwave (85 GHz) image at 1322 UTC (below) from the CIMSS Tropical Cyclones site indicated... Read More