JMA Himawari-9 Infrared Window (10.4 µm) images (above) showed Cyclone Freddy in the South Indian Ocean as it was rapidly intensifying from a Category 1 to a Category 3 storm by 12 UTC on 11 February 2023 (JTWC discussion), eventually presenting a ragged eye for several hours — then briefly reaching... Read More
RADARSAT Constellation Mission Satellite 1 (RCM-1) overflew tropical cyclone Freddy in the eastern Indian Ocean on 9 February, and Synthetic Aperture Radar (SAR) winds from the satellite captured a well-developed eye with (instantaneous) surface winds that peaked around 25 m/s. More information on SAR winds with Freddy is available here. The toggle above shows the storm center displaced significantly to the east... Read More
Himawari-9 Upper Level Water Vapor infrared (6.25 µm) imagery for the 8 hours ending 1300 UTC on 8 February 2023 show the nighttime blossoming of convection near the center of developing tropical cyclone Gabrielle to the east of Australia in the tropical southwest Pacific. The environment of the storm is... Read More
GOES-18 Clean window infrared imagery (10.3 µm, displayed at full resolution in a special sector over American Samoa, in the latest AWIPS build) shows an area of convection, within a region of abundant moisture (GOES-18 Total Precipitable water values are close to 2.5″), approaching the Samoan islands (that are located... Read More
