{"id":72510,"date":"2026-10-06T23:59:00","date_gmt":"2026-10-06T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=72510"},"modified":"2026-10-07T03:21:38","modified_gmt":"2026-10-07T03:21:38","slug":"tropical-depression-nine-forms-in-the-gulf-of-mexico-and-is-forecast-to-intensify-to-tropical-storm-or-possibly-hurricane-isaias","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/72510","title":{"rendered":"Tropical Depression Nine forms in the Gulf of Mexico, and is forecast to intensify to Tropical Storm (or possibly Hurricane) Isaias"},"content":{"rendered":"\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/10\/261006_g19_ir_td9.mov\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Infrared Window images with plots of GLM Flash Points, from 1601 UTC on 06 October to 0200 UTC on 07 October<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">1-minute Mesoscale Domain Sector GOES-19 <em>(GOES-East)<\/em> Infrared Window images <strong><em>(above)<\/em><\/strong> showed <strong><a href=\"https:\/\/www.nhc.noaa.gov\/archive\/2026\/NINE.shtml?\">Tropical Depression Nine<\/a><\/strong> as it gradually developed a closed center of circulation in the southwestern Gulf of Mexico by 2100 UTC on 06 October 2026. Plots of GLM Flash Points depicted the lightning activity within the slowly-organizing tropical system. The coldest cloud-top infrared brightness temperatures associated with convective bursts were -85 to -89C.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/10\/261006_g19_vis_shear_td9.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>GOES-19 Visible images with an overlay of contours and streamlines of deep-layer wind shear at 2300 UTC on 06 October<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tropical Depression Nine was embedded within an environment of modest vertical wind shear, as seen in Visible images <strong><em>(above)<\/em><\/strong> and Infrared Window images <strong><em>(below)<\/em><\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/10\/261006_g19_ir_shear_td9.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>GOES-19 Infrared Window images with an overlay of contours and streamlines of deep-layer wind shear at 2300 UTC on 06 October<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">This blog post will be updated as TD9 intensifies into Tropical Storm Isaias and then possibly Hurricane Isaias in the next few days&#8230;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Infrared Window images (above) showed Tropical Depression Nine as it gradually developed a closed center of circulation in the southwestern Gulf of Mexico by 2100 UTC on 06 October 2026. Plots of GLM Flash Points depicted the lightning activity within the slowly-organizing tropical system. The coldest cloud-top infrared brightness [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":72517,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76,159,30,2],"tags":[],"class_list":["post-72510","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glm","category-goes-19","category-lightning","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/72510","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=72510"}],"version-history":[{"count":10,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/72510\/revisions"}],"predecessor-version":[{"id":72522,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/72510\/revisions\/72522"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/72517"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=72510"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=72510"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=72510"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}