The RCM-1 (Radarsat Constellation Mission 1) satellite overflew STY Bolaven at 0840 UTC on 11 October. The Himawari-9 infrared (10.4 µm) presentation of the storm is excellent with a symmetric storm, distinct eye, and vigorous outer band convection. SAR winds show the strongest convection in the eastern half of the... Read More
Target Sector (2.5-minute interval) JMA Himawari-9 AHI Red Visible (0.64 µm) images (above) and Clean Infrared Window (10.4 µm) mages (below) showed Super Typhoon Bolaven as it reached Category 5 intensity west of the Northern Mariana Islands at 0000 UTC (SATCON) on 11 October 2023. Bolaven was an annular tropical cyclone, exhibiting a symmetric eye surrounded by a... Read More
Target Sector (2.5-minute interval) JMA Himawari-9 AHI Clean Infrared Window (10.4 µm) images (above) and Red Visible (0.64 µm) mages (below) showed Tropical Storm Bolaven as it intensified to become a Category 1 Typhoon just southeast of the Mariana Islands at 0000 UTC (SATCON | JTWC advisory) on 10 October 2023. The coldest cloud-top infrared brightness temperatures, associated with... Read More
Former Hurricane Philippe lost tropical characteristics at 1500 UTC on 6 October, as it interacted with extratopical features moving over it from the USA. (Click here for a UW-Madison weather watch on this event with commentary by Profs Jon Martin and Michael Morgan). There are several players of note in... Read More
