{"id":55041,"date":"2023-10-09T15:58:51","date_gmt":"2023-10-09T15:58:51","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=55041"},"modified":"2023-10-13T15:15:21","modified_gmt":"2023-10-13T15:15:21","slug":"airmass-rgb-imagery-during-the-extratropical-transition-of-philippe","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/55041","title":{"rendered":"Airmass RGB imagery during the extratropical transition of Philippe"},"content":{"rendered":"\n<figure class=\"wp-block-video\"><video height=\"1184\" style=\"aspect-ratio: 2028 \/ 1184;\" width=\"2028\" controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/10\/GOES-16_ABI_RadF_airmass_20231005_0000_to_1010_0000rock.mp4\"><\/video><figcaption class=\"wp-element-caption\">GOES-16 AIrmass RGB, hourly from 0000 UTC 5 October 2023 &#8211; 0000 UTC 10 October 2023 <\/figcaption><\/figure>\n\n\n\n<p>Former Hurricane <a href=\"https:\/\/www.nhc.noaa.gov\/archive\/2023\/PHILIPPE.shtml?\">Philippe<\/a> lost tropical characteristics at 1500 UTC on 6 October, as it interacted with extratopical features moving over it from the USA.  (Click <a href=\"https:\/\/www.youtube.com\/watch?v=WIUNB4mH-EQ\">here<\/a> for a UW-Madison weather watch on this event with commentary by Profs Jon Martin and Michael Morgan).  There are several players of note in this animation:   Philippe, a disorganized mass of convection off the east coast of the US, a subtropical jetstream moving through the southern United States and a potent upper-tropospheric impulse moving from Canada into the upper Great Lakes.  Each of these systems have potential vorticity anomalies (different shades of orange in the RGB) that can be tracked.<\/p>\n\n\n\n<p>Philippe&#8217;s extratropical transition is coincident with the arrival of a PV anomaly associated with the subtropical jet;  that anomaly is moving through the mid-Atlantic states late in the day 6 October\/early 7 October.  Starting on 8 October, the PV anomaly with the system moving through the Great Lakes also affects the poleward-moving remains of Philippe.<\/p>\n\n\n\n<p>The resultant occluded cyclone remained over eastern Canada through 11 October &#8212; as seen below in an animation of surface analyses from the <a href=\"https:\/\/ocean.weather.gov\/index.php\">Ocean Prediction Center<\/a>.<\/p>\n\n\n<div style=\"width: 960px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2023\/10\/231005_231011_Atlantic_surface_analyses_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2023\/10\/231007_12z_atl_sfc.png\" width=\"950\" height=\"1140\" \/><\/a><p class=\"wp-caption-text\">Surface analyses, from 0000 UTC on 5 October to 1800 UTC on 11 October (courtesy Scott Bachmeier, CIMSS [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2023\/10\/231005_231011_Atlantic_surface_analyses_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>","protected":false},"excerpt":{"rendered":"<p>Former Hurricane Philippe lost tropical characteristics at 1500 UTC on 6 October, as it interacted with extratopical features moving over it from the USA. (Click here for a UW-Madison weather watch on this event with commentary by Profs Jon Martin and Michael Morgan). There are several players of note in this animation: Philippe, a disorganized [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":55083,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,74,2,5],"tags":[],"class_list":["post-55041","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-interpretation","category-goes-16","category-tropical-cyclones","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55041","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=55041"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55041\/revisions"}],"predecessor-version":[{"id":55120,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55041\/revisions\/55120"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/55083"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=55041"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=55041"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=55041"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}