{"id":71493,"date":"2026-07-26T23:59:00","date_gmt":"2026-07-26T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=71493"},"modified":"2026-07-27T18:00:39","modified_gmt":"2026-07-27T18:00:39","slug":"hurricane-genevieve-rapidly-intensifies-to-a-category-4-storm-in-east-pacific","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/71493","title":{"rendered":"Hurricane Genevieve rapidly intensifies to a Category 5 storm in the East Pacific"},"content":{"rendered":"\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_g19_vis_glm_Genevieve.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Visible images with plots of GLM Flash Points, from 1701 UTC on 26 July to 0000 UTC on 27 July<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">1-minute Mesoscale Domain Sector GOES-19 <em>(GOES-Eas)t<\/em> Visible images <strong><em>(above)<\/em><\/strong> showed Hurricane Genevieve as it was rapidly intensifying to become a Category 4 storm on 26 July 2026. Low-altitude mesovorticies were very apparent within the eye &#8212; and <strong><a href=\"https:\/\/www.goes-r.gov\/spacesegment\/glm.html\">GLM<\/a><\/strong> Flash Points depicted intermittent lightning activity within the eyewall of the hurricane.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The corresponding 1-minute GOES-19 Infrared Window images <strong><em>(below)<\/em><\/strong> displayed cloud-top infrared brightness temperatures as cold as -75 to -80 C surrounding the eye.<\/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\/07\/260726_g19_ir_glm_Genevieve.mov\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Infrared Window images with plots of GLM Flash Points, from 1701 UTC on 26 July to 0000 UTC on 27 July<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Products from the <strong><a href=\"https:\/\/tropic.ssec.wisc.edu\/\">CIMSS Tropical Cyclones<\/a><\/strong> site indicated that Genevieve was moving through an environment of low <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_g19_ir_0000utcShear.gif\">deep-layer wind shear<\/a><\/strong>, and traversing <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_sst_Genevieve.gif\">warm water<\/a><\/strong>. These favorable factors allowed the hurricane to reach a 135-knot intensity by <strong><a href=\"https:\/\/www.nhc.noaa.gov\/archive\/2026\/ep07\/ep072026.discus.011.shtml\">0300 UTC<\/a><\/strong> on 27 July (<strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_adt_Genevieve.jpeg\">ADT<\/a><\/strong> | <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_dmint_Genevieve.png\">D-MINT<\/a><\/strong> | <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/07\/260726_satcon_Genevieve.png\">SATCON<\/a><\/strong>).<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\"><strong>===== 27 July Update =====<\/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\/07\/260727_g19_ir_glm_Genevieve_Cat5.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Infrared Window images with plots of GLM Flash Points, from 0201-0700 UTC on 27 July<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Hurricane Genevieve continued to intensify after sunset, reaching 140-knot Category 5 intensity by 0600 UTC on 27 July (<strong><a href=\"https:\/\/www.nhc.noaa.gov\/archive\/2026\/ep07\/ep072026.discus.012.shtml\">0900 UTC NHC discussion<\/a><\/strong>).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>1-minute Mesoscale Domain Sector GOES-19 (GOES-Eas)t Visible images (above) showed Hurricane Genevieve as it was rapidly intensifying to become a Category 4 storm on 26 July 2026. Low-altitude mesovorticies were very apparent within the eye &#8212; and GLM Flash Points depicted intermittent lightning activity within the eyewall of the hurricane. The corresponding 1-minute GOES-19 Infrared [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":71495,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76,159,30,2],"tags":[],"class_list":["post-71493","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\/71493","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=71493"}],"version-history":[{"count":18,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71493\/revisions"}],"predecessor-version":[{"id":71529,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71493\/revisions\/71529"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/71495"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=71493"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=71493"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=71493"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}