{"id":9578,"date":"2012-01-15T23:59:52","date_gmt":"2012-01-15T23:59:52","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=9578"},"modified":"2012-01-17T04:29:44","modified_gmt":"2012-01-17T04:29:44","slug":"cold-air-and-snowfall-invade-the-pacific-northwest","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/9578","title":{"rendered":"Cold air and snowfall invade the Pacific Northwest"},"content":{"rendered":"<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2012\/01\/120115_poes_avhrr_vis_ir_pacnw_anim.gif\"><img loading=\"lazy\" decoding=\"async\" alt=\"POES AVHRR 0.86 \u00c2\u00b5m visible channel + POES AVHRR 12.0 \u00c2\u00b5m IR channel images\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2012\/01\/120115_poes_avhrr_vis_ir_pacnw_anim.gif\" title=\"POES AVHRR 0.86 \u00c2\u00b5m visible channel + POES AVHRR 12.0 \u00c2\u00b5m IR channel images\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">POES AVHRR 0.86 \u00c2\u00b5m visible channel + POES AVHRR 12.0 \u00c2\u00b5m IR channel images<\/p><\/div>\n<p>A surge of cold air brought the first measurable snowfall to parts of the Pacific Northwest states on <strong><strong><a href=\"http:\/\/www.hpc.ncep.noaa.gov\/dailywxmap\/index_20120114.html\" title=\"14 January 2012 daily weather map\">14 January<\/a><\/strong> &#8211; <strong><a href=\"http:\/\/www.hpc.ncep.noaa.gov\/dailywxmap\/index_20120115.html\" title=\"15 January 2012 daily weather map\">15 January 2012<\/a><\/strong><\/strong>. The Seatle-Tacoma aiport received 2.4 inches of snow on 15 January. A comparison of 1-km resolution POES AVHRR 0.86 \u00c2\u00b5m visible channel and 12.0 \u00c2\u00b5m IR channel data <strong><em>(above)<\/em><\/strong> displayed a classic example of &#8220;open cell convection&#8221; &#8212; this type of open-cell mesoscale convective cloud pattern is a signature of strong instability <em>(via boundary layer cold air advection over relatively warmer waters)<\/em> in an environment of cyclonic flow.<\/p>\n<p>A sequence of 1-km resolution POES AVHRR 12.0 \u00c2\u00b5m IR channel images <strong><em>(below)<\/em><\/strong> showed the inland progression of the open cell convection, eventually producing snowfall at Seattle, Washington <em>(station identifier KSEA)<\/em> and Portland, Oregon <em>(station identifier KPDX)<\/em>.<\/p>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2012\/01\/120114-15_poes_avhrr_ir_pacnw_anim.gif\"><img loading=\"lazy\" decoding=\"async\" alt=\"POES AVHRR 12.0 \u00c2\u00b5m IR channel images\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2012\/01\/120114-15_poes_avhrr_ir_pacnw_anim.gif\" title=\"POES AVHRR 12.0 \u00c2\u00b5m IR channel images\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">POES AVHRR 12.0 \u00c2\u00b5m IR channel images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>A surge of cold air brought the first measurable snowfall to parts of the Pacific Northwest states on 14 January &#8211; 15 January 2012. The Seatle-Tacoma aiport received 2.4 inches of snow on 15 January. A comparison of 1-km resolution POES AVHRR 0.86 \u00c2\u00b5m visible channel and 12.0 \u00c2\u00b5m IR channel data (above) displayed a [&hellip;]<\/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":[22,10,26,5],"tags":[],"class_list":["post-9578","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-general-interpretation","category-poes","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9578","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=9578"}],"version-history":[{"count":2,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9578\/revisions"}],"predecessor-version":[{"id":9580,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/9578\/revisions\/9580"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=9578"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=9578"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=9578"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}