{"id":30571,"date":"2018-11-06T22:59:24","date_gmt":"2018-11-06T22:59:24","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=30571"},"modified":"2018-11-08T15:30:18","modified_gmt":"2018-11-08T15:30:18","slug":"mesoscale-vortex-in-north-dakota","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/30571","title":{"rendered":"Mesoscale vortex in North Dakota"},"content":{"rendered":"<p><center><\/p>\n<blockquote class=\"twitter-tweet\" data-lang=\"en\">\n<p dir=\"ltr\" lang=\"en\">A neat circulation feature appeared this morning northwest of Fargo. <a href=\"https:\/\/twitter.com\/hashtag\/ndwx?src=hash&amp;ref_src=twsrc%5Etfw\">#ndwx<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/mnwx?src=hash&amp;ref_src=twsrc%5Etfw\">#mnwx<\/a> <a href=\"https:\/\/t.co\/AhLRsVSTZQ\">pic.twitter.com\/AhLRsVSTZQ<\/a><\/p>\n<p>\u2014 NWS Grand Forks (@NWSGrandForks) <a href=\"https:\/\/twitter.com\/NWSGrandForks\/status\/1059840604748820483?ref_src=twsrc%5Etfw\">November 6, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/center><\/p>\n<p>One interesting aspect of this <strong><a href=\"https:\/\/www.wpc.ncep.noaa.gov\/dailywxmap\/index_20181106.html\">06 November 2018<\/a><\/strong> mesoscale vortex (which was embedded within a stratus cloud deck) was the fact that a signature of the feature was evident in imagery from 15 of the 16 <a href=\"https:\/\/www.goes-r.gov\/spacesegment\/abi.html\"><strong>ABI<\/strong><\/a> spectral bands on GOES-16<em><strong> (below)<\/strong><\/em> &#8212; only the <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band08.pdf\"><strong>6.2 \u00b5m<\/strong><\/a> Upper-level Water Vapor images lacked even a subtle signal. The appearance of the vortex on <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band04.pdf\"><strong>1.37 \u00b5m<\/strong><\/a> Near-Infrared &#8220;Cirrus&#8221; imagery was possible because the atmospheric column was very dry over that region (<strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_modis_tpw-20181106_195500.png\">MODIS Total Precipitable Water<\/a><\/strong> values of 2-4 mm or 0.08-0.16 inch, and 0.31 inch on the <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_12utc_kabr_raob.png\">12 UTC Aberdeen SD sounding<\/a><\/strong>), so there was very little attenuation of upwelling 1.37 \u00b5m radiation by middle\/upper-tropospheric water vapor.<\/p>\n<p><div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_16panel_ND_vortex_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_16panel-20181106_163718.png\" alt=\"16-panel comparison of GOES-16 ABI spectral bands [click to play animation | MP4]\" width=\"639\" height=\"370\" \/><\/a><p class=\"wp-caption-text\">16-panel comparison of GOES-16 ABI spectral bands [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_16panel_ND_vortex_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>Closer views of GOES-16 &#8220;Red&#8221; Visible (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band02.pdf\"><strong>0.64 \u00b5m<\/strong><\/a>), Near-Infrared &#8220;Snow\/Ice&#8221; (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band05.pdf\"><strong>1.61 \u00b5m<\/strong><\/a>) and Low-level Water Vapor (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band10.pdf\"><strong>7.3 \u00b5m<\/strong><\/a>) images are shown below. The dry air aloft also shifted the altitude of the GOES-16 Water Vapor band <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/wf\/\"><strong>weighting functions<\/strong><\/a> to lower altitudes &#8212; calculated using 12 UTC rawinsonde data from <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_12utc_kabr_goes16_water_vapor_weighting_functions.png\"><strong>Aberdeen SD<\/strong><\/a>, the 7.3 \u00b5m Low-level Water Vapor weighting function peaked near 600 hPa, with significant contributions from as low as the 700 hPa level.<\/p>\n<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\/2018\/11\/181106_goes16_visible_snowIce_waterVapor_ND_vortex_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/G16_VIS_NIR_WV_ND_06NOV2018_2018310_155218_GOES-16_0003PANELS.GIF\" alt=\"GOES-16 \" width=\"640\" height=\"418\" \/><\/a><p class=\"wp-caption-text\">GOES-16 &#8220;Red&#8221; Visible <em>(0.64 \u00b5m, left),<\/em> Near-Infrared &#8220;Snow\/Ice&#8221; <em>(1.61 \u00b5m, center)<\/em> and Low-level Water Vapor <em>(7.3<\/em> <em>\u00b5m, right)<\/em> images [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_visible_snowIce_waterVapor_ND_vortex_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>A sequence of\u00a0Terra\/Aqua MODIS and NOAA-20\/Suomi NPP VIIRS legacy &#8220;fog\/stratus&#8221; Brightness Temperature Difference (BTD) images <em><strong>(below)<\/strong><\/em> indicated that the vortex formed about 40 miles northwest of Devils Lake (KDVL) sometime between 0438 UTC and 0805 UTC (10:38 PM and 2:05 AM local time). An AWIPS-1 version of the animation is available <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_viirs_fogBTD_ND_vortex_awips1_anim.gif\">here<\/a><\/strong>.<\/p>\n<p><div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_viirs_fogBTD_ND_vortex_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_viirs_fogBTD_ND_vortex_anim.gif\" alt=\"Fog\/sratus infrared Brightness Temperature Difference images from Terra\/Aqua MODIS and NOAA-20\/Suomi NPP VIIRS [click to enlarge | MP4]\" width=\"641\" height=\"368\" \/><\/a><p class=\"wp-caption-text\">Fog\/sratus infrared Brightness Temperature Difference images from Terra\/Aqua MODIS and NOAA-20\/Suomi NPP VIIRS [click to enlarge | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_viirs_fogBTD_ND_vortex_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The stratus clouds surrounding the vortex could be further characterized using a variety of GOES-16 channel difference and derived products as shown below.<\/p>\n<p><div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_split_phase_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_split_phase-20181106_163718.png\" alt=\"GOES-16 Split Cloud Top Phase (11.2 - 8.4 \u00b5m) product [click to play animation | MP4]\" width=\"639\" height=\"366\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Split Cloud Top Phase <em>(11.2 &#8211; 8.4 \u00b5m)<\/em> product [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_split_phase_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_G16_CloudPhaseBTD.pdf\"><strong>Split Cloud Top Phase<\/strong><\/a> (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band14.pdf\"><strong>11.2 \u00b5m<\/strong><\/a> &#8211; <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band11.pdf\"><strong>8.4 \u00b5m<\/strong><\/a>) product <em><strong>(above)<\/strong><\/em> allowed this feature to be followed during darkness and daylight. It initially became apparent in GOES-16 imagery near Devils Lake shortly after 11 UTC or 5 AM local time, then traveled southeastward to the southeastern corner of the state before beginning to lose definition after 20 UTC or 2 PM local time. Positive values of this infrared BTD product <em>(shades of blue to cyan)<\/em> highlight water droplet clouds, while negative BTD values <em>(shades of violet)<\/em> indicate clouds composed of ice crystals.<\/p>\n<p><div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_particle_size_distribution_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_size_dist-20181106_180218.png\" alt=\"GOES-16 Cloud Particle Size Distribution product [click to play animation | MP4]\" width=\"641\" height=\"367\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Cloud Particle Size Distribution product [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_particle_size_distribution_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_BaselineCloudParticleSizeDistribution.pdf\"><strong>Cloud Particle Size Distribution<\/strong><\/a> derived product <em><strong>(above)<\/strong><\/em> uses Visible and Near-Infrared bands, so is only created during daylight hours &#8212; and only for solar zenith angles of 65\u00ba or less, which meant only for a few hours over much of North Dakota with the low sun angle of early November. The product showed a tongue of smaller cloud-top particles <em>(darker blue to violet enhancement)<\/em> wrapping cyclonically into the center of the feature during the day.<\/p>\n<p><div style=\"width: 648px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_phase_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_phase-20181106_163718.png\" alt=\"GOES-16 Cloud Top Phase product [click to play animation | MP4]\" width=\"638\" height=\"365\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Cloud Top Phase product [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_phase_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_BaselineCloudPhase.pdf\"><strong>Cloud Top Phase<\/strong><\/a> product <em><strong>(above)<\/strong><\/em> indicated that the vortex and surrounding stratus cloud deck were composed of supercooled water droplets <em>(lighter green enhancement)<\/em>.<\/p>\n<p><div style=\"width: 648px\" class=\"wp-caption aligncenter\"><a class=\"thumbnail\" href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_height_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_height-20181106_163718.png\" alt=\"GOES-16 Cloud Top Height product [click to play animation | MP4]\" width=\"638\" height=\"365\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Cloud Top Height product [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_height_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>The <a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_BaselineCloudTopHeight.pdf\"><strong>Cloud Top Height<\/strong><\/a> product <em><strong>(above)<\/strong><\/em> showed that the vortex and surrounding stratus clouds had tops generally in the 12,000-14,000 feet range <em>(darker shades of blue)<\/em>.<\/p>\n<p><div style=\"width: 649px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_visible_cirrus_snowIce_infraredWindow_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_visible_cirrus_snowIce_infraredWindow_ND_anim.gif\" alt=\"Terra and Aqua MODIS Visible (0.65 \u00b5m), Cirrus (1.37 \u00b5m), Snow\/Ice (1.61 \u00b5m) and Infrared Window (11.0 \u00b5m) at 1816 UTC and 1955 UTC [click to enlarge | MP4]\" width=\"639\" height=\"366\" \/><\/a><p class=\"wp-caption-text\">Terra and Aqua MODIS Visible <em>(0.65 \u00b5m),<\/em> Cirrus <em>(1.37 \u00b5m),<\/em> Snow\/Ice <em>(1.61 \u00b5m)<\/em> and Infrared Window <em>(11.0<\/em> <em>\u00b5m)<\/em> at 1816 UTC and 1955 UTC [click to enlarge | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_modis_visible_cirrus_snowIce_infraredWindow_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>Comparisons of Terra and Aqua MODIS Visible (0.65 \u00b5m), Cirrus (1.37 \u00b5m), Snow\/Ice (1.61 \u00b5m) and Infrared Window (11.0 \u00b5m) at 1816 UTC and 1955 UTC are shown above &#8212; and comparisons of VIIRS Visible (0.64 \u00b5m), Snow\/Ice (1.61 \u00b5m) and Infrared Window (11.45 \u00b5m) images from Suomi NPP at 1841 UTC and 2020 UTC along with NOAA-20<em> (incorrectly labeled as Suomi NPP)<\/em> at 1941 UTC are shown below. Infrared Window brightness temperatures from both MODIS and VIIRS were in the -20\u00ba to -25\u00baC range <em>(cyan to light blue enhancement)<\/em> within and adjacent to the vortex.<\/p>\n<p><div style=\"width: 648px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_viirs_visible_snowIce_infraredWindow_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_viirs_visible_snowIce_infraredWindow_ND_anim.gif\" alt=\"Suomi NPP VIIRS Visible (0.64 \u00b5m), Snow\/Ice (1.61 \u00b5m) and Infrared Window (11.45 \u00b5m) images at 1841 UTC, 1941 UTC and 2020 UTC [click to enlarge | MP4]\" width=\"638\" height=\"365\" \/><\/a><p class=\"wp-caption-text\">Suomi NPP VIIRS Visible <em>(0.64 \u00b5m),<\/em> Snow\/Ice <em>(1.61 \u00b5m)<\/em> and Infrared Window <em>(11.45 \u00b5m)<\/em> images at 1841 UTC, 1941 UTC and 2020 UTC [click to enlarge | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_viirs_visible_snowIce_infraredWindow_ND_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>A closer view was provided by a sequence of True Color and False Color Red-Green-Blue (RGB) images from Terra\/Aqua MODIS and Suomi NPP VIIRS as visualized using <a href=\"http:\/\/realearth.ssec.wisc.edu\"><strong>RealEarth<\/strong><\/a> <em><strong>(below)<\/strong><\/em>.<\/p>\n<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\/2018\/11\/181106_modis_viirs_truecolor_falsecolor_ND_vortex_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_1848utc_snpp_viirs_tc.jpg\" alt=\"True Color and False Color RGB images from Terra\/Aqua MODIS and Suomi NPP VIIRS [click to play animation]\" width=\"640\" height=\"417\" \/><\/a><p class=\"wp-caption-text\">True Color and False Color RGB images from Terra\/Aqua MODIS and Suomi NPP VIIRS [click to play animation]<\/p><\/div>The mesoscale vortex &#8212; whose diameter was only about 20-30 miles &#8212; formed within cyclonic boundary layer flow about 100 miles south of an advancing cold front <em><strong>(below)<\/strong><\/em>.<\/p>\n<p><div style=\"width: 651px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_modis_vis_front-20181106_181600.png\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/nd_modis_vis_front-20181106_181600.png\" alt=\"Terra MODIS Visible (0.65 \u00b5m) image with aurface analysis of pressure and fronts [click to enlarge]\" width=\"641\" height=\"367\" \/><\/a><p class=\"wp-caption-text\">Terra MODIS Visible <em>(0.65 \u00b5m)<\/em> image with aurface analysis of pressure and fronts [click to enlarge]<\/p><\/div>One potential forcing mechanism could have been a lobe of 700 hPa vorticity which was about 30 miles upstream of the vortex at 12 UTC and 18 UTC, according to the NAM12 model <em><strong>(below)<\/strong><\/em>.<\/p>\n<p><div style=\"width: 648px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_phase_700hPa_vorticity_ND_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/11\/181106_goes16_cloud_top_phase_700hPa_vorticity_ND_anim.gif\" alt=\"GOES-16 Split Cloud Top Phase (11.2 - 8.4 \u00b5m) product at 1202 and 1802 UTC, with overlays of NAM12 700 hPa vorticity [click to enlarge] \" width=\"638\" height=\"365\" \/><\/a><p class=\"wp-caption-text\">GOES-16 Split Cloud Top Phase <em>(11.2 &#8211; 8.4 \u00b5m)<\/em> product at 1202 and 1802 UTC, with overlays of NAM12 model 700 hPa vorticity [click to enlarge]<\/p><\/div>[Note: AWIPS color enhancements that differ from the defaults were used for some of the GOES-16 images and products shown here, to better highlight the subtle vortex feature]<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A neat circulation feature appeared this morning northwest of Fargo. #ndwx #mnwx pic.twitter.com\/AhLRsVSTZQ \u2014 NWS Grand Forks (@NWSGrandForks) November 6, 2018 One interesting aspect of this 06 November 2018 mesoscale vortex (which was embedded within a stratus cloud deck) was the fact that a signature of the feature was evident in imagery from 15 of [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":30576,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[70,74,12,78,53,45,49,71,48],"tags":[],"class_list":["post-30571","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aqua","category-goes-16","category-modis","category-noaa-20","category-real-earth","category-redgreenblue-rgb-images","category-suomi_npp","category-terra","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30571","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=30571"}],"version-history":[{"count":31,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30571\/revisions"}],"predecessor-version":[{"id":30603,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/30571\/revisions\/30603"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/30576"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=30571"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=30571"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=30571"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}