{"id":55848,"date":"2023-12-07T20:58:23","date_gmt":"2023-12-07T20:58:23","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=55848"},"modified":"2023-12-09T18:06:26","modified_gmt":"2023-12-09T18:06:26","slug":"cyclone-jasper","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/55848","title":{"rendered":"Cyclone Jasper in the Coral Sea"},"content":{"rendered":"

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JMA Himawari-9 Clean Infrared Window (10.4 \u00b5m) images, from 0002 UTC on 07 December to 0602 UTC on 08 December [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>Target Sector<\/strong><\/a>\u00a0(2.5-minute interval)\u00a0JMA<\/strong><\/a>\u00a0Himawari-9\u00a0AHI<\/strong><\/a>\u00a0Clean Infrared Window (10.4 \u00b5m) images\u00a0(above)<\/strong><\/em> showed the gradual development of a ragged eye with Cyclone Jasper as the storm moved southward across the Coral Sea on 07 December 2023. Intermittent convective bursts within the eyewall contained a few overshooting tops that exhibited infrared brightness temperatures around -90\u00baC (yellow pixels embedded within dark purple areas).<\/p>\n

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DMSP-17 SSMIS Microwave (85 GHz) image at 0816 UTC on 07 December [click to enlarge]<\/p><\/div>The partially-fragmented structure of the eyewall was evident in a DMSP-17 SSMIS Microwave image at 0816 UTC (source<\/strong><\/a>) (above)<\/strong><\/em> and a RCM-1 Synthetic Aperture Radar wind speed image at 0807 UTC (source<\/strong><\/a>) (below)<\/strong><\/em>.<\/p>\n

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RCM-1 Synthetic Aperture Radar wind speed image at 0807 UTC on 07 December [click to enlarge]<\/p><\/div>Himawari-9 Infrared Window (11.2 \u00b5m) images from the\u00a0CIMSS Tropical Cyclones<\/strong><\/a>\u00a0site\u00a0(below)<\/strong><\/em> showed that Jasper was moving through an environment of low deep-layer wind shear<\/strong><\/a>\u00a0\u2014 which, in addition to its motion across warm water (SST<\/strong><\/a>\u00a0|\u00a0OHC<\/strong><\/a>) favored continued intensification.<\/p>\n

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JMA Himawari-9 Infrared Window (11.2 \u00b5m) images, with contours and streamlines of deep-layer wind shear at 1500 UTC on 07 December [click to enlarge]<\/p><\/div>
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DMSP-17 SSMIS Microwave (85 GHz) image at 1927 UTC on 07 December [click to enlarge]<\/p><\/div>Jasper was upgraded to Category 3 intensity at 1800 UTC (JTWC discussion<\/strong><\/a>) — and a DMSP-17 SSMIS Microwave image at 1927 UTC (above)<\/strong><\/em> as well as a RCM-3 SAR wind speed image at 1914 UTC (below)<\/strong><\/em> displayed a more organized eyewall structure.<\/p>\n

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RCM-3 Synthetic Aperture Radar wind speed image at 1914 UTC on 07 December [click to enlarge]<\/p><\/div>Jasper was subsequently upgraded to a Category 4 storm at 0000 UTC on 08 December (SATCON<\/strong><\/a>), as the satellite presentation of the eye improved in Himawari-9 Infrared images — and mesovortices within the eye were revealed in Visible images (below)<\/strong><\/em>.<\/p>\n

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JMA Himawari-9 Red Visible (0.64 \u00b5m, left) and Clean Infrared Window (10.4 \u00b5m, right) images, from 2232 UTC on 07 December to 0732 UTC on 08 December [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Target Sector\u00a0(2.5-minute interval)\u00a0JMA\u00a0Himawari-9\u00a0AHI\u00a0Clean Infrared Window (10.4 \u00b5m) images\u00a0(above) showed the gradual development of a ragged eye with Cyclone Jasper as the storm moved southward across the Coral Sea on 07 December 2023. Intermittent convective bursts within the eyewall contained a few overshooting tops that exhibited infrared brightness temperatures around -90\u00baC (yellow pixels embedded within dark […]<\/p>\n","protected":false},"author":18,"featured_media":55855,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[56,73,79,104,25,2],"tags":[],"class_list":["post-55848","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dmsp","category-himawari-9","category-microwave","category-sar","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55848","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/users\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=55848"}],"version-history":[{"count":25,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55848\/revisions"}],"predecessor-version":[{"id":55890,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55848\/revisions\/55890"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/55855"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=55848"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=55848"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=55848"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}