Target Sector (2.5-minute interval) JMA Himawari-9 AHI Visible and Infrared images (above) showed Category 4 Typhoon Khanun as it moved just south of Okinawa Island  from 0502-1002 UTC on 01 August 2023. Visible images depicted mesovortces within the eye.During that 0502-1002 UTC time period, peak wind gusts at the 3 METAR sites located in... Read More

Typhoon Doksuri moved between the Philippines and Taiwan late on 26 July 2023 as it approached mainland China. Both Sentinel-1A and RCM-3 overflew the storm shortly after 2200 UTC on 26 July, and those two scenes are shown above in concert with a Band 13 Himawari-9 Clean Window infrared (10.4... Read More

The Joint Typhoon Warning Center (JTWC) website has for more than a day been tracking invest number 91W, shown above. The feature is circled in yellow, meaning development is unlikely in the next 24 hours. What satellite data might be used to make that determination?MIMIC Total Precipitable water fields, for the 24 hours ending... Read More

The image above shows International Space Station orbital paths over the western Pacific Ocean on 24 July 2023, computed from the TLE files and displayed using McIDAS. Note the orbital path at 1600 UTC that moves from mainland China southeastward over Taiwan and then to Indonesia. This is in close... Read More