{"id":15326,"date":"2014-04-10T22:31:05","date_gmt":"2014-04-10T22:31:05","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=15326"},"modified":"2014-04-12T00:41:46","modified_gmt":"2014-04-12T00:41:46","slug":"severe-tropical-cyclone-ita","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/15326","title":{"rendered":"Severe Tropical Cyclone Ita"},"content":{"rendered":"
\"MTSAT-2<\/a>

MTSAT-2 10.8 \u00c2\u00b5m IR channel images (click to play animation)<\/p><\/div>\n

McIDAS images of MTSAT-2 10.8 \u00c2\u00b5m IR channel data (above; click image to play animation)<\/strong><\/em> showed the development of a distinct eye associated with Intense Cyclone Ita (23P) as it moved southwestward across the Coral Sea toward the coast of Queensland, Australia on 10-11 April 2014. Cyclone Ita exhibited a period of rapid intensification (Advanced Dvorak Technique plot<\/strong><\/a>) early on 10 April, reaching Category 4 intensity (JTWC advisory<\/strong><\/a>) on the Saffir-Simpson scale (or a Category 5 on the Australian intensity scale: BOM advisory<\/strong><\/a>). Ita had been moving through an environment with weak deep layer wind shear<\/strong><\/a> and over warm sea surface temperatures<\/strong><\/a>, which aided in its intensification.<\/p>\n

A timely overpass of a Metop polar-orbiting satellite provided ASCAT surface scatterometer winds at 11:26 UTC, as seen on an image from the CIMSS Tropical Cyclones<\/strong><\/a> site (below)<\/strong><\/em>.<\/p>\n

\"MTSAT-1<\/a>

MTSAT-1 10.8 IR image with Metop ASCAT surface scatterometer winds<\/p><\/div>\n

The structure of the eye of Ita was nicely displayed on a TRMM satellite TMI 85 GHz microwave image at 14:32 UTC (below)<\/strong><\/em>.<\/p>\n

\"TRMM<\/a>

TRMM TMI 85 GHz microwave image<\/p><\/div>\n

A McIDAS-V image comparison of Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR and 0.7 \u00c2\u00b5m Day\/Night Band data at 14:58 UTC (below; courtesy of William Straka, SSEC\/CIMSS)<\/strong><\/em> showed great detail of the eye and surrounding eyewall region of Ita.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR and 0.7 \u00c2\u00b5m Day\/Night Band images<\/p><\/div>\n

The first available early-morning MTSAT-2 0.675 \u00c2\u00b5m visible channel image at 20:32 UTC (below)<\/strong><\/em> revealed a convective tower within the northeastern portion of the eyewall region, with a distinct overshooting top (10-11 April animation of MTSAT-2 visible images<\/strong><\/a>).<\/p>\n

\"MTSAT-2<\/a>

MTSAT-2 0.675 \u00c2\u00b5m visible channel image<\/p><\/div>\n

The MTSAT InfraRed\/Water Vapor difference product (below; click image to play animation)<\/strong><\/em> indicated that overshooting tops were likely around a large area surrounding the core of Ita.<\/p>\n

\"MTSAT<\/a>

MTSAT IR\/WV Difference product (click to play animation)<\/p><\/div>\n

===== 11 April Update =====<\/strong><\/p>\n

A TRMM satellite TMI 85 GHz microwave image at 05:23 UTC showed that Ita had a double-eyewall structure as it was close to making landfall, indicating that the cyclone was undergoing an eyewall replacement cycle — this suggests that Ita was in a weakening phase as it made landfall.<\/p>\n

\"TRMM<\/a>

TRMM TMI 85 GHz microwave image<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

McIDAS images of MTSAT-2 10.8 \u00c2\u00b5m IR channel data (above; click image to play animation) showed the development of a distinct eye associated with Intense Cyclone Ita (23P) as it moved southwestward across the Coral Sea toward the coast of Queensland, Australia on 10-11 April 2014. Cyclone Ita exhibited a period of rapid intensification (Advanced […]<\/p>\n","protected":false},"author":18,"featured_media":15328,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[58,20,47,25,49,2,48],"tags":[],"class_list":["post-15326","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-metop","category-mtsat","category-other-satellites","category-satellite-winds","category-suomi_npp","category-tropical-cyclones","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15326","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=15326"}],"version-history":[{"count":20,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15326\/revisions"}],"predecessor-version":[{"id":15348,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/15326\/revisions\/15348"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/15328"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=15326"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=15326"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=15326"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}