Typhoon Chanhom south of Japan
Multi-spectral views from Himawari-8’s “Target Sector” that provides 2-minute imagery, above, show weakening Typhoon Chan-hom south of Japan. The Typhoon shows a sheared structure, with the surface circulation southwest of the main convection, a shift that is especially evident in the Band 5 1.61 µm channel that differentiates between low clouds containing water droplets and upper clouds containing ice crystals. (Himawari data courtesy of the Japan Meteorological Agency.) A 24-hour animation (ending at 0500 UTC on 9 October) of Mimic Total Precipitable water (from this site) shows that the storm is surrounded by dry air to the north and west.
An analysis of Advanced Microwave Sounder Unit (AMSU) Channel 7 (54.94 GHz), below, (from this site) shows a warm anomaly over the storm. Atmospheric shear (200-850 mb) is also shown in this figure, and the storm is approaching a region of high shear.