{"id":4659,"date":"2010-03-09T17:50:13","date_gmt":"2010-03-09T17:50:13","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=4659"},"modified":"2010-05-20T17:41:51","modified_gmt":"2010-05-20T17:41:51","slug":"another-tropical-cyclone-in-the-south-atlantic-ocean","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/4659","title":{"rendered":"Another tropical cyclone in the South Atlantic Ocean!"},"content":{"rendered":"
\"Meteosat-9<\/a>

Meteosat-9 10.8 \u00c2\u00b5m IR images<\/p><\/div>\n

EUMETSAT Metetosat-9 10.8 \u00c2\u00b5m IR images (above; also available as a QuickTime movie<\/a>)<\/em><\/strong> showed the evolution of a disturbance that had all the appearances of being another example of a rather rare event: a subtropical cyclone in the South Atlantic Ocean (off the southeast coast of Brazil)<\/em> during the 09 March 2010 – 10 March 2010<\/strong> time period. <\/p>\n

This system was eventually declared to be tropical cyclone on 10 March, according to this HPC discussion:<\/p>\n

SOUTH AMERICA SYNOPTIC DISCUSSION
\nINTERNATIONAL DESKS
\nNWS HYDROMETEOROLOGICAL PREDICTION CENTER
\nCAMP SPRINGS MD
\n847 AM EST WED MAR 10 2010<\/p>\n

GFS DATA AT FTPPRD.NCEP.NOAA.GOV\/PUB\/DATA\/NCCF\/COM\/GFS\/PROD\/<\/p>\n

SYNOPSIS (VALID FROM 00Z MAR 10). THE UPPER LEVEL ANALYSIS SHOWS A CLOSED LOW NEAR 33S 45W EXTENDING A SHORT WAVE TROUGH TO THE NORTHWEST INTO BRASIL ALONG 20S 50W. THIS FEATURE IS DECOUPLING FROM A WARM CORE SURFACE LOW OFF THE COAST OF BRASIL…WITH CLOSED CIRCULATION ESTIMATED NEAR 29.6S 48.2W. ALTHOUGH A TIGHT\/COMPACT STORM…IT IS NOW CLASSIFIED AS A TROPICAL CYCLONE RATHER THAN SUBTROPICAL.<\/p><\/blockquote>\n

On 13 March this storm was given the name “Anita” by the Brazilian MetSul<\/a><\/strong> weather center . Note that Brazil has only had one documented case of a land-falling<\/strong> tropical cyclone that had reached hurricane intensity — “Catarina” in March 2004<\/a><\/strong>.<\/p>\n

A false-color NOAA-19 Red\/Green\/Blue (RGB) image using channels 01\/02\/04 (below)<\/em><\/strong> displayed a nice view of the tropical cyclone on 10 March. The low-level circulation (clouds with a slightly yellow hue) was becoming partially exposed, with a large burst of convection occurring in the southwest quadrant of the cyclone.<\/p>\n

\"NOAA-19<\/a>

NOAA-19 false-color Red\/Green\/Blue (RGB) image<\/p><\/div>\n

On a closer view using the corresponding NOAA-19 10.8 \u00c2\u00b5m IR image (below),<\/em><\/strong> note the presence of a packet of gravity waves which was propagating southwestward away from the region of coldest overshooting tops (which were around -70\u00c2\u00ba C<\/strong>, darker black color enhancement)<\/em>.<\/p>\n

\"NOAA-19<\/a>

NOAA-19 10.8 \u00c2\u00b5m IR image<\/p><\/div>\n

A later animation of IR imagery from the CIMSS Tropical Cyclones<\/a><\/strong> site (below)<\/em><\/strong> showed the development of additional convective bursts within the southern portion of the cyclone. Even well to the northwest of the center of the circulation, there was a ship report showing wind speeds of 35 knots.<\/p>\n

\"IR<\/a>

IR images + ship reports<\/p><\/div>\n

.<\/p>\n

\"IR<\/a>

IR image + deep layer wind shear<\/p><\/div>\n

The tropical cyclone formed in an environment characterized by a moderate amount of deep layer wind shear (above),<\/em><\/strong> over a region of sea surface temperatures that were near 25\u00c2\u00ba C (below)<\/em><\/strong>.<\/p>\n

\"Sea<\/a>

Sea surface temperature analysis<\/p><\/div>\n

Additional details and images of this South Atlantic tropical cyclone can be found at the Weather Underground<\/a><\/strong>, AccuWeather<\/a><\/strong>, and NASA<\/a><\/strong>.<\/p>\n","protected":false},"excerpt":{"rendered":"

EUMETSAT Metetosat-9 10.8 \u00c2\u00b5m IR images (above; also available as a QuickTime movie) showed the evolution of a disturbance that had all the appearances of being another example of a rather rare event: a subtropical cyclone in the South Atlantic Ocean (off the southeast coast of Brazil) during the 09 March 2010 – 10 March […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22,23,45,25,2],"tags":[],"class_list":["post-4659","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-meteosat","category-redgreenblue-rgb-images","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4659","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=4659"}],"version-history":[{"count":28,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4659\/revisions"}],"predecessor-version":[{"id":5713,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4659\/revisions\/5713"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=4659"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=4659"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=4659"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}