{"id":34633,"date":"2019-10-10T23:59:36","date_gmt":"2019-10-10T23:59:36","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=34633"},"modified":"2019-10-11T17:40:47","modified_gmt":"2019-10-11T17:40:47","slug":"high-plains-lee-side-cold-frontal-gravity-wave","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/34633","title":{"rendered":"High Plains leeside cold frontal gravity wave"},"content":{"rendered":"<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_goes16_waterVapor_winds_gusts_Plains_cold_front_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/G16_WATER_VAPOR_CDFNT_10OCT2019_B1098_2019283_110126_0003PANELS_FRAME00061.GIF\" alt=\"GOES-16 Low-level (7.3 \u00b5m, left), Mid-level (6.9 \u00b5m, center) and Upper-level (6.2 \u00b5m, right) Water Vapor images, with plots of surface wind barbs and gusts in knots [click to play animation | MP4]\" width=\"640\" height=\"360\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Low-level <em>(7.3 \u00b5m, left),<\/em> Mid-level <em>(6.9 \u00b5m, center)<\/em> and Upper-level <em>(6.2 \u00b5m, right)<\/em> Water Vapor images, with plots of surface wind barbs and gusts in knots [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_goes16_waterVapor_winds_gusts_Plains_cold_front_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>GOES-16 <em>(GOES-East)<\/em> Low-level (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band10.pdf\"><strong>7.3 \u00b5m<\/strong><\/a>), Mid-level (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band09.pdf\"><strong>6.9 \u00b5m<\/strong><\/a>) and Upper-level (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band08.pdf\"><strong>6.2 \u00b5m<\/strong><\/a>) Water Vapor images <em><strong>(above)<\/strong><\/em> revealed the classic signature of a leeside cold frontal gravity wave (<a href=\"https:\/\/journals.ametsoc.org\/doi\/full\/10.1175\/1520-0469%281999%29056%3C2986%3ADTGWCB%3E2.0.CO%3B2\"><strong>reference<\/strong><\/a>) moving southward across the High Plains on 10 October 2019. Peak wind gusts of 50-60 mph were reported at some sites in eastern Colorado and western Kansas &#8212; and impressive drops in surface air temperature accompanied the cold frontal passage.<br \/>\n<center><\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">Largest October 1-day temperature drops! <a href=\"https:\/\/twitter.com\/hashtag\/COWX?src=hash&amp;ref_src=twsrc%5Etfw\">#COWX<\/a> <a href=\"https:\/\/t.co\/8c92nFCsXH\">pic.twitter.com\/8c92nFCsXH<\/a><\/p>\n<p>\u2014 NWS Pueblo (@NWSPueblo) <a href=\"https:\/\/twitter.com\/NWSPueblo\/status\/1182454988095840256?ref_src=twsrc%5Etfw\">October 11, 2019<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/p>\n<blockquote class=\"twitter-tweet\">\n<p dir=\"ltr\" lang=\"en\">Here&#8217;s a summary of the records set during the recent storm. Two of them are quite remarkable. 1) Breaking the record low today by 13\u00b0! 2) Tying the second largest 2-day temperature swing on record. <a href=\"https:\/\/twitter.com\/hashtag\/COwx?src=hash&amp;ref_src=twsrc%5Etfw\">#COwx<\/a> <a href=\"https:\/\/t.co\/e6eoYu1bDB\">pic.twitter.com\/e6eoYu1bDB<\/a><\/p>\n<p>\u2014 NWS Boulder (@NWSBoulder) <a href=\"https:\/\/twitter.com\/NWSBoulder\/status\/1182652343269109761?ref_src=twsrc%5Etfw\">October 11, 2019<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/center><br \/>\nOn the corresponding GOES-16 &#8220;Red&#8221;<span class=\"css-901oao css-16my406 r-1qd0xha r-ad9z0x r-bcqeeo r-qvutc0\"> Visible (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band02.pdf\"><strong>0.64 \u00b5m<\/strong><\/a>) imagery <em><strong>(below)<\/strong>, <\/em>note the lack of clouds along the western end of the cold front (across the New Mexico \/ Texas border region).<\/span><\/p>\n<p><div style=\"width: 652px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_goes16_visible_waterVapor_winds_gusts_Plains_cold_front_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/G16_VIS_WATER_VAPOR_CDFNT_10OCT2019_B298_2019283_180126_0003PANELS_FRAME00061.GIF\" alt=\"GOES-16 &quot;Red&quot; Visible (0.64 \u00b5m, left), Mid-level Water Vapor (6.9 \u00b5m, center) and Upper-level Water Vapor (6.2 \u00b5m, right) images, with plots of surface wind barbs and gusts in knots [click to play animation | MP4]\" width=\"642\" height=\"361\" \/><\/a><p class=\"wp-caption-text\">GOES-16 &#8220;Red&#8221; Visible<em> (0.64 \u00b5m, left),<\/em> Mid-level Water Vapor <em>(6.9 \u00b5m, center)<\/em> and Upper-level Water Vapor <em>(6.2 \u00b5m, right)<\/em> images, with plots of surface wind barbs and gusts in knots [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_goes16_visible_waterVapor_winds_gusts_Plains_cold_front_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>A plot of rawinsonde data from Amarillo, Texas at 12 UTC <em><strong>(below)<\/strong> <\/em>showed how shallow the cold air was behind the cold front as it first moved southward through the Texas Panhandle.<\/p>\n<p><div style=\"width: 653px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_12UTC_KAMA_RAOB.GIF\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_12UTC_KAMA_RAOB.GIF\" alt=\"Plot of rawinsonde data from Amarillo, Texas [click to enlarge]\" width=\"643\" height=\"482\" \/><\/a><p class=\"wp-caption-text\">Plot of 12 UTC rawinsonde data from Amarillo, Texas [click to enlarge]<\/p><\/div>However, note that GOES-16 Water Vapor <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/wf\/\"><strong>weighting functions<\/strong><\/a> calculated using 12 UTC rawinsonde data from Amarillo <em><strong>(below)<\/strong><\/em> indicated that peak contributions were in the middle troposphere &#8212; in the 440-500 hPa pressure range &#8212; with no surface radiation contributions at 6.9 \u00b5m or 6.2 \u00b5m. It was the deep-tropospheric nature of the leeside cold frontal gravity wave that allowed its signature to be sensed by the 6.9 \u00b5m and 6.2 \u00b5m Water Vapor spectral bands.<\/p>\n<div style=\"width: 652px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_12utc_kama_wv_wf.png\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2019\/10\/191010_12utc_kama_wv_wf.png\" alt=\"GOES-16 Water Vapor weighting functions, calculated using 12 UTC rawinsonde data from Amarillo, Texas [click to enlarge]\" width=\"642\" height=\"662\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Water Vapor weighting functions, calculated using 12 UTC rawinsonde data from Amarillo, Texas [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>GOES-16 (GOES-East) Low-level (7.3 \u00b5m), Mid-level (6.9 \u00b5m) and Upper-level (6.2 \u00b5m) Water Vapor images (above) revealed the classic signature of a leeside cold frontal gravity wave (reference) moving southward across the High Plains on 10 October 2019. Peak wind gusts of 50-60 mph were reported at some sites in eastern Colorado and western Kansas [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":34640,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74],"tags":[],"class_list":["post-34633","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/34633","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=34633"}],"version-history":[{"count":8,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/34633\/revisions"}],"predecessor-version":[{"id":34654,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/34633\/revisions\/34654"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/34640"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=34633"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=34633"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=34633"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}