{"id":62167,"date":"2024-12-16T15:59:00","date_gmt":"2024-12-16T15:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=62167"},"modified":"2024-12-20T19:44:02","modified_gmt":"2024-12-20T19:44:02","slug":"subtropical-storm-bigua-near-the-coast-of-brazil","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/62167","title":{"rendered":"Subtropical Storm Bigu\u00e1 near the coast of Brazil"},"content":{"rendered":"<p><div style=\"width: 1311px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241214_241216_goes16_trueColorRGB_nighttimeMicrophysicsRGB_Subtropical_Storm_Bigua_Brazil_anim.mp4\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/goeseast_abi_radf_true_color_night_20241215130020.png\" width=\"1301\" height=\"737\" \/><\/a><p class=\"wp-caption-text\">GOES-16 daytime True Color RGB + Nighttime Microphysics RGB images, from 1200 UTC on 14th December to 1200 UTC on 16th December [click to play MP4 animation]<\/p><\/div>10-minute Full Disk scan GOES-16 <em>(GOES-East)<\/em> daytime True Color RGB + <a href=\"https:\/\/rammb2.cira.colostate.edu\/wp-content\/uploads\/2020\/01\/QuickGuide_GOESR_NtMicroRGB_Final_20191206-1.pdf\"><strong>Nighttime Microphysics RGB<\/strong><\/a> images from the <a href=\"https:\/\/geosphere.ssec.wisc.edu\/#playing:true;coordinate:0,0;num_frames:37;\"><strong>CSPP GeoSphere<\/strong><\/a> site <em><strong>(above)<\/strong><\/em> depicted the cyclonic (clockwise in the Southern Hemisphere) circulation associated with the formation of Subtropical Storm Bigu\u00e1 just off the coast of Rio Grande do Sul state in far southern Brazil during the 14th-16th December 2024 period.<\/p>\n<p>12-hourly surface analyses shown below (<a href=\"https:\/\/www.marinha.mil.br\/chm\/dados-do-smm-cartas-sinoticas\/cartas-sinoticas?field_data_value%5Bvalue%5D%5Bday%5D=15&amp;field_data_value%5Bvalue%5D%5Bmonth%5D=12&amp;field_data_value%5Bvalue%5D%5Byear%5D=2024&amp;field_horario_value=00HMG\"><strong>source<\/strong><\/a>) indicated that this subtropical storm developed as an area of low pressure (denoted by a red &#8220;B&#8221;) moved southeast across Rio Grande do Sul on 14th December, becoming classified as Subtropical Storm (&#8220;Tempestade Subtropical&#8221;) Bigu\u00e1 shortly after it moved offshore at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241215_00z_sfc_br.png\"><strong>0000 UTC on 15th December<\/strong><\/a>. 24 hours later, Bigu\u00e1 was downgraded to a Subtropical Depression (&#8220;Depressao Subtropical&#8221;) at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241216_00z_sfc_br.png\"><strong>0000 UTC on 16th December<\/strong><\/a>.<\/p>\n<p><div style=\"width: 1510px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241214_241216_Brazil_surface_analyses_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241215_12z_sfc_br.png\" width=\"1500\" height=\"2219\" \/><\/a><p class=\"wp-caption-text\">Surface analyses from 0000 UTC on 14th December to 0000 UTC on 17th December [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241214_241216_Brazil_surface_analyses_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>A sequence of ASCAT surface scatterometer winds (<a href=\"https:\/\/manati.star.nesdis.noaa.gov\/datasets\/ASCATBData.php\"><strong>source<\/strong><\/a>) from Metop-B and Metop-C <em><strong>(below)<\/strong><\/em> showed that the compact low-level circulation center of Subtropical Storm Bigu\u00e1 remained just off the Brazilian coast on 15th December. The strongest winds were generally within the southern semicircle of the storm.<\/p>\n<div style=\"width: 750px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241215_metop_ascat_Brazil_sts_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2024\/12\/241215_metop_ascat_Brazil_sts_anim.gif\" width=\"740\" height=\"650\" \/><\/a><p class=\"wp-caption-text\">ASCAT winds from Metop-B and Metop-C on 15th December<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>10-minute Full Disk scan GOES-16 (GOES-East) daytime True Color RGB + Nighttime Microphysics RGB images from the CSPP GeoSphere site (above) depicted the cyclonic (clockwise in the Southern Hemisphere) circulation associated with the formation of Subtropical Storm Bigu\u00e1 just off the coast of Rio Grande do Sul state in far southern Brazil during the 14th-16th [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":62172,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,58,25,2],"tags":[],"class_list":["post-62167","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-metop","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/62167","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=62167"}],"version-history":[{"count":15,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/62167\/revisions"}],"predecessor-version":[{"id":62192,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/62167\/revisions\/62192"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/62172"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=62167"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=62167"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=62167"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}