{"id":28418,"date":"2018-06-07T22:25:09","date_gmt":"2018-06-07T22:25:09","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=28418"},"modified":"2018-06-10T18:24:24","modified_gmt":"2018-06-10T18:24:24","slug":"hurricane-aletta","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/28418","title":{"rendered":"Hurricane Aletta"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m, left)<\/em> and “Clean” Infrared Window (10.3 \u00b5m, right)<\/em> images [click to play MP4 animation]<\/p><\/div>Tropical Storm Aletta was upgraded to Hurricane Aletta at 21 UTC<\/strong><\/a> on 07 June 2018. As was the case on 06 June<\/strong><\/a>, a GOES-16 Mesoscale Domain Sector centered over the tropical cyclone provided 1-minute data — and an eye eventually became apparent on\u00a0 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) and “Clean” Infrared Window (10.3 \u00b5m<\/strong><\/a>) imagery (above)<\/strong><\/em>.<\/p>\n

DMSP-15, DMSP-17 and GPM GMI<\/strong><\/a> Microwave (85 GHz) imagery from the CIMSS Tropical Cyclones<\/strong><\/a> site (below)<\/strong> <\/em>showed an increase in organization of the eye structure as the day progressed.<\/p>\n

\"DMSP-15<\/a>

DMSP-15 SSMI Microwave image [click to enlarge]<\/p><\/div>

\"DMSP-17<\/a>

DMSP-17 SSMIS Microwave image [click to enlarge]<\/p><\/div>

\"GPM<\/a>

GPM GMI Microwave image [click to enlarge]<\/p><\/div><\/p>\n

===== 08 June Update =====<\/strong><\/p>\n

\"GOES-16<\/a>

GOES-16 “Clean” Infrared Window (10.3 \u00b5m)<\/em> images [click to play MP4 animation]<\/p><\/div>Aletta went through a period of rapid intensification (ADT<\/strong><\/a> | SATCON<\/strong><\/a>), reaching Category 4 status by 15 UTC<\/strong><\/a> on 08 June. 1-minute GOES-16 Infrared (10.3 \u00b5m) images (above)<\/strong><\/em> showed the eye becoming more well-defined during the pre-dawn hours.<\/p>\n

After sunrise, GOES-16 Visible images (below)<\/strong><\/em> initially hinted at the presence of mesovortices within the eye of Aletta.<\/p>\n

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m, left)<\/em> and “Clean” Infrared Window (10.3 \u00b5m, right)<\/em> images [click to play MP4 animation]<\/p><\/div>Aletta had been moving over relatively warm water and within an environment characterized by low values of deep-layer wind shear<\/strong><\/a> (below)<\/strong><\/em> — both\u00a0 of which were favorable factors for intensification. An animation of the deep-layer wind shear over the East Pacific Ocean during 06-07 June is available here<\/strong><\/a>.<\/p>\n

\"Sea<\/a>

Sea Surface Temperature and Deep-Layer Wind Shear products [click to enlarge]<\/p><\/div>Aletta peaked in intensity later in the day on 08 June (ADT<\/strong><\/a> | SATCON<\/strong><\/a>) — as pointed out by NHC<\/strong><\/a> “This is also consistent with GOES-16 measurements of increased inner-core lightning observed to be occurring to the east of the eastern eyewall, which some research suggests corresponds to a halting of the intensification process”. GOES-16 Infrared (10.3 \u00b5m) imagery with GLM<\/strong><\/a> Group Density counts are shown below.<\/p>\n

\"GOES-16<\/a>

GOES-16 “Clean” Infrared Window (10.3 \u00b5m) with GLM Group Density counts [click to play MP4 animation]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Tropical Storm Aletta was upgraded to Hurricane Aletta at 21 UTC on 07 June 2018. As was the case on 06 June, a GOES-16 Mesoscale Domain Sector centered over the tropical cyclone provided 1-minute data — and an eye eventually became apparent on\u00a0 “Red” Visible (0.64 \u00b5m) and “Clean” Infrared Window (10.3 \u00b5m) imagery (above). […]<\/p>\n","protected":false},"author":18,"featured_media":28433,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[56,74,30,79,47,25,2],"tags":[],"class_list":["post-28418","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dmsp","category-goes-16","category-lightning","category-microwave","category-other-satellites","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28418","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=28418"}],"version-history":[{"count":28,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28418\/revisions"}],"predecessor-version":[{"id":28463,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/28418\/revisions\/28463"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/28433"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=28418"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=28418"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=28418"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}