{"id":583,"date":"2007-12-10T23:55:37","date_gmt":"2007-12-10T23:55:37","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/583"},"modified":"2007-12-19T16:20:45","modified_gmt":"2007-12-19T16:20:45","slug":"black-stratus-over-the-upper-midwest","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/583","title":{"rendered":"&#8220;Black stratus&#8221; over the Upper Midwest"},"content":{"rendered":"<p><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2007\/12\/071210_g10_ir4_anim.gif\" target=\"_blank\" title=\"GOES-10 10.7 \u00c2\u00b5m IR images (Animated GIF)\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2007\/12\/071210_g10_ir4_anim.gif\" alt=\"GOES-10 10.7 \u00c2\u00b5m IR images (Animated GIF)\" title=\"GOES-10 10.7 \u00c2\u00b5m IR images (Animated GIF)\" align=\"middle\" height=\"361\" width=\"480\" \/><\/a><\/p>\n<p>AWIPS images of the GOES-10 10.7 \u00c2\u00b5m IR channel <em><strong>(above)<\/strong><\/em> showed a patch of low-level stratus cloud drifting north-northeastward across Iowa, Minnesota, and Wisconsin on <strong>10 December 2007<\/strong>. Note how the tops of the cloud feature appeared <em><strong>warmer<\/strong> (darker gray enhancement)<\/em> than the adjacent  cloud-free <em>(but <strong><a href=\"http:\/\/www.nohrsc.nws.gov\/interactive\/html\/map.html?mode=pan&amp;zoom=&amp;center_x=++-97.41&amp;center_y=+++48.75&amp;ql=station&amp;var=snow_depth_obs_24_h&amp;dy=2007&amp;dm=12&amp;dd=10&amp;dh=12&amp;snap=1&amp;o9=1&amp;o12=1&amp;o13=1&amp;lbl=m&amp;min_x=-97.500416666658&amp;min_y=35.730000686641&amp;max_x=-82.275416666658&amp;max_y=50.95500068664&amp;coord_x=-89.887916666658&amp;coord_y=43.3425006866405&amp;zbox_n=&amp;zbox_s=&amp;zbox_e=&amp;zbox_w=&amp;metric=0&amp;bgvar=dem&amp;width=1000&amp;height=1000&amp;nw=1000&amp;nh=1000&amp;type=0&amp;js=1&amp;uc=0\" target=\"_blank\" title=\"NOHRSC snow cover\">snow-covered<\/a><\/strong>)<\/em> areas; the term <em>&#8220;black stratus&#8221;<\/em> was coined to describe the appearance of these cloud features on grayscale IR imagery. Strong radiational cooling during the night-time hours created a well-defined boundary layer temperature inversion, making the altitude of the stratus cloud tops several degrees C warmer than the surface.<\/p>\n<p>On the comparison of MODIS and GOES-10 &#8220;fog\/stratus product&#8221; images <em><strong>(below)<\/strong><\/em>, the MODIS image in particular suggested that the leading edge of the stratus cloud feature was notably thicker <em>(orange to red enhancement)<\/em>. This thicker cloud edge may have acted to dramatically slow radiational cooling as the cloud deck moved overhead &#8212; in fact, surface temperatures <em><strong>(above)<\/strong><\/em> were seen to warm by several degrees F when the cloud feature was overhead.<\/p>\n<p><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2007\/12\/071210_modis_goes_fog_amim.gif\" target=\"_blank\" title=\"GOES-10 + MODIS fog\/stratus product\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2007\/12\/071210_modis_goes_fog_amim.gif\" alt=\"GOES-10 + MODIS fog\/stratus product\" title=\"GOES-10 + MODIS fog\/stratus product\" align=\"middle\" height=\"461\" width=\"480\" \/><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>AWIPS images of the GOES-10 10.7 \u00c2\u00b5m IR channel (above) showed a patch of low-level stratus cloud drifting north-northeastward across Iowa, Minnesota, and Wisconsin on 10 December 2007. Note how the tops of the cloud feature appeared warmer (darker gray enhancement) than the adjacent cloud-free (but snow-covered) areas; the term &#8220;black stratus&#8221; was coined to [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,14,12],"tags":[],"class_list":["post-583","post","type-post","status-publish","format-standard","hentry","category-general-interpretation","category-goes-10","category-modis"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/583","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=583"}],"version-history":[{"count":0,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/583\/revisions"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=583"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=583"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=583"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}