{"id":31126,"date":"2018-12-18T23:59:32","date_gmt":"2018-12-18T23:59:32","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=31126"},"modified":"2018-12-21T23:03:24","modified_gmt":"2018-12-21T23:03:24","slug":"rare-december-tornado-in-washington","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/31126","title":{"rendered":"Rare December tornado in Washington"},"content":{"rendered":"<p><center><\/p>\n<blockquote class=\"twitter-tweet\" data-lang=\"en\">\n<p dir=\"ltr\" lang=\"en\">Preliminary Damage Results for Port Orchard Tornado have been released. Survey finds EF-2 <a href=\"https:\/\/twitter.com\/hashtag\/tornado?src=hash&amp;ref_src=twsrc%5Etfw\">#tornado<\/a> damage from Tuesday December 18th. Details in graphic and at: <a href=\"https:\/\/t.co\/fnaZxgYG6U\">https:\/\/t.co\/fnaZxgYG6U<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/wawx?src=hash&amp;ref_src=twsrc%5Etfw\">#wawx<\/a> <a href=\"https:\/\/twitter.com\/hashtag\/PortOrchardTornado?src=hash&amp;ref_src=twsrc%5Etfw\">#PortOrchardTornado<\/a> <a href=\"https:\/\/t.co\/jxpsBgkmgC\">pic.twitter.com\/jxpsBgkmgC<\/a><\/p>\n<p>\u2014 NWS Seattle (@NWSSeattle) <a href=\"https:\/\/twitter.com\/NWSSeattle\/status\/1075514908182265856?ref_src=twsrc%5Etfw\">December 19, 2018<\/a><\/p><\/blockquote>\n<p><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script><\/center><br \/>\n<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\/12\/181218_goes17_visible_spcStormReports_WA_tornado_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/G17_VIS_WA_SVR_18DEC2018_2018352_214719_GOES-17_0001PANEL.GIF\" alt=\"\" width=\"639\" height=\"479\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Red&#8221; Visible <em>(0.64 \u00b5m)<\/em> images, with plots of hourly surface reports and SPC storm reports [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_goes17_visible_spcStormReports_WA_tornado_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div><\/p>\n<p style=\"text-align: center;\"><em>* GOES-17 images shown here are preliminary and non-operational *<\/em><\/p>\n<p>A <a href=\"https:\/\/twitter.com\/NWSSeattle\/status\/1075189545161908225\"><strong>rare December tornado<\/strong><\/a> occurred in Port Orchard, Washington on <a href=\"https:\/\/www.wpc.ncep.noaa.gov\/dailywxmap\/index_20181218.html\"><strong>18 December 2018<\/strong><\/a>. GOES-17\u00a0&#8220;Red&#8221; Visible (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band02.pdf\"><strong>0.64 \u00b5m<\/strong><\/a>) images <em><strong>(above)<\/strong><\/em> and\u00a0&#8220;Clean&#8221; Infrared Window (<a href=\"http:\/\/cimss.ssec.wisc.edu\/goes\/OCLOFactSheetPDFs\/ABIQuickGuide_Band13.pdf\"><strong>10.3 \u00b5m<\/strong><\/a>) images <em><strong>(below)<\/strong><\/em> showed the thunderstorms that moved eastward across the area in the wake of the passage of an <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_surface_analyses_Pacific_NW_anim.gif\"><strong>occluded front<\/strong><\/a> earlier in the day.<\/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\/12\/181218_goes17_infrared_spcStormReports_WA_tornado_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"thumbnail\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/G17_IR_WA_SVR_18DEC2018_2018352_214719_GOES-17_0001PANEL.GIF\" alt=\"GOES-17 &quot;Clean&quot; Infrared Window (10.3 \u00b5m) images, with plots of hourly surface reports and SPC storm reports [click to play animation | MP4]\" width=\"639\" height=\"479\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Clean&#8221; Infrared Window (10.3 \u00b5m) images, with plots of hourly surface reports and SPC storm reports [click to play animation | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_goes17_infrared_spcStormReports_WA_tornado_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>Due to the relatively large GOES-17 satellite viewing angle (or <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181219_00utc_kuil_wv_wf.png\"><strong>zenith angle<\/strong><\/a>) of 56.38 degrees, there was a modest amount of <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/217\">parallax<\/a><\/strong> error in terms of the actual location of cloud-top features associated with the tornado-producing storm. A toggle between\u00a0GOES-17 Visible and Infrared images at 2147 UTC with SPC tornado reports plotted at their actual and &#8220;parallax-corrected&#8221; locations (assuming a mean storm-top height of 8 km) are shown below &#8212; note how the <em>parallax-corrected<\/em> tornado plot location more closely aligns with top the parent thunderstorm.<\/p>\n<p><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_2147utc_goes17_visible_spcStormReport_parallax_WA_tornado_anim.gif\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_2147utc_goes17_visible_spcStormReport_parallax_WA_tornado_anim.gif\" alt=\"GOES-17 &quot;Red&quot; Visible (0.64 \u00b5m) image at 2147 UTC, with SPC tornado report plots at their actual and &quot;parallax-corrected&quot; locations [click to enlarge]\" width=\"640\" height=\"480\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Red&#8221; Visible <em>(0.64 \u00b5m)<\/em> image at 2147 UTC, with SPC tornado report plots at their actual and &#8220;parallax-corrected&#8221; locations [click to enlarge]<\/p><\/div><div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_2147utc_goes17_infrared_spcStormReport_parallax_WA_tornado_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_2147utc_goes17_infrared_spcStormReport_parallax_WA_tornado_anim.gif\" alt=\"GOES-17 &quot;Clean&quot; Infrared Window (10.3 \u00b5m) image at 2147 UTC, with SPC tornado report plots at their actual and &quot;parallax-corrected&quot; locations [click to enlarge]\" width=\"640\" height=\"480\" \/><\/a><p class=\"wp-caption-text\">GOES-17 &#8220;Clean&#8221; Infrared Window <em>(10.3 \u00b5m)<\/em> image at 2147 UTC, with SPC tornado report plots at their actual and &#8220;parallax-corrected&#8221; locations [click to enlarge]<\/p><\/div>A comparison of VIIRS Infrared Window (11.45 \u00b5m) images from Suomi NPP (Washington overpass time: 2042 UTC) and NOAA-20 (Washington overpass time: 2132 UTC) is shown below. The coldest cloud-top infrared brightness temperatures on the VIIRS images were -42\u00baC <em>(bright green enhancement),<\/em> which corresponded to altitudes of 7-8 km on 00 UTC <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181219_00UTC_KUIL_RAOB.TEXT\">rawinsonde data<\/a><\/strong> from Quillayute, Washington (<strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181219_00utc_kuil_raob.png\">plot<\/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\/12\/181218_suomiNPP_noaa20_viirs_infrared_WA_tornado_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_suomiNPP_noaa20_viirs_infrared_WA_tornado_anim.gif\" alt=\"VIIRS Infrared Window (11.45 \u00b5m) images from Suomi NPP (overpass time 2042 UTC) and NOAA-20 (overpass time 2132 UTC) [click to enlarge]\" width=\"641\" height=\"370\" \/><\/a><p class=\"wp-caption-text\">VIIRS Infrared Window <em>(11.45 \u00b5m)<\/em> images from Suomi NPP <em>(overpass time 2042 UTC)<\/em> and NOAA-20 <em>(overpass time 2132 UTC), <\/em>with the location of the SPC tornado report plotted in red [click to enlarge]<\/p><\/div>A toggle between NOAA-20 VIIRS Infrared Window (11.45 \u00b5m) images at the local overpass times of 1952 UTC and 2132 UTC, viewed using <a href=\"http:\/\/realearth.ssec.wisc.edu\"><strong>RealEarth<\/strong><\/a> <em><strong>(below)<\/strong>,<\/em> provided a closer view of the convection.<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_noaa20_viirs_infraredWindow_WA_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2018\/12\/181218_noaa20_viirs_infraredWindow_WA_anim.gif\" alt=\"NOAA-20 VIIRS Infrared Window (11.45 \u00b5m) images at 1952 UTC and 2032 UTC [click to enlarge]\" width=\"640\" height=\"357\" \/><\/a><p class=\"wp-caption-text\">NOAA-20 VIIRS Infrared Window <em>(11.45 \u00b5m)<\/em> images at 1952 UTC and 2032 UTC [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>Preliminary Damage Results for Port Orchard Tornado have been released. Survey finds EF-2 #tornado damage from Tuesday December 18th. Details in graphic and at: https:\/\/t.co\/fnaZxgYG6U #wawx #PortOrchardTornado pic.twitter.com\/jxpsBgkmgC \u2014 NWS Seattle (@NWSSeattle) December 19, 2018 * GOES-17 images shown here are preliminary and non-operational * A rare December tornado occurred in Port Orchard, Washington on [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":31142,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[80,78,53,3,49,48],"tags":[],"class_list":["post-31126","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-17","category-noaa-20","category-real-earth","category-severe-convection","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31126","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=31126"}],"version-history":[{"count":29,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31126\/revisions"}],"predecessor-version":[{"id":31171,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31126\/revisions\/31171"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/31142"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=31126"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=31126"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=31126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}