![\"Himawari-8](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2020\/04\/200405_himawari8_infrared_TC_Harold_anim.gif\")
<\/a>Himawari-8 Infrared Window (10.4 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>Tropical Cyclone Harold made landfall on Vanuatu’s<\/strong><\/a> largest island of Espiritu Santo as a Category 4 storm (ADT<\/strong><\/a> | SATCON<\/strong><\/a>) on 05 April 2020. JMA<\/strong><\/a> Himawari-8 Infrared Window (10.4 \u00b5m) images (above)<\/strong><\/em> showed the emergence of a well defined eye — which exhibited some trochoidal motion. Cloud-top infrared brightness temperatures were -90\u00baC and colder (yellow pixels embedded within dark purple)<\/em> before the eye became evident. The structure of the eye was seen to deteriorate somewhat after Harold made landfall.<\/p>\n Himawari-8 “Red” Visible (0.64 \u00b5m) images (below)<\/strong><\/em> revealed a similar deterioration of the eye after landfall.<\/p>\n Himawari-8 “Red” Visible (0.64 \u00b5m)<\/em> images [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>VIIRS Infrared Window (11.45 \u00b5m) images from NOAA-20 and Suomi NPP as viewed using RealEarth (below)<\/strong><\/em> provided more detailed view of Harold several hours before landfall.<\/p>\n VIIRS Infrared Window (11.45 \u00b5m)<\/em> images from NOAA-20 and Suomi NPP [click to enlarge]<\/p><\/div>A toggle between NOAA-20 VIIRS Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 1359 UTC (below)<\/strong><\/em> helped to highlight the cloud-top gravity waves between the eye of Harold and the west coast of Espiritu Santo.<\/p>\n NOAA-20 VIIRS Day\/Night Band (0.7 \u00b5m)<\/em> and Infrared Window (11.45 \u00b5m)<\/em> images (credit: William Straka, CIMSS) [click to enlarge]<\/p><\/div>A DMSP-18 SSMIS Microwave (85 GHz) image from the CIMSS Tropical Cyclones<\/strong><\/a> site (below)<\/strong><\/em> showed Harold at 1719 UTC.<\/p>\n<\/a><\/a><\/a>