{"id":50335,"date":"2023-02-08T10:07:00","date_gmt":"2023-02-08T10:07:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=50335"},"modified":"2023-02-08T18:13:31","modified_gmt":"2023-02-08T18:13:31","slug":"clear-skies-over-the-western-great-lakes","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/50335","title":{"rendered":"Clear skies over the western Great Lakes"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_0800toggle.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1504\" height=\"920\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_0800toggle.gif\" alt=\"\" class=\"wp-image-50336\"\/><\/a><figcaption class=\"wp-element-caption\">VIIRS Visible (0.7 \u00b5m) Imagery (Dynamic Day Night Band) and ACSPO SST analysis, 0800 UTC 0n 8 February 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>Predominantly clear skies and a waning Full Moon (the Full Moon was on 5 February) allowed for both Day Night Band imagery of the surface and Advanced Clear-Sky Processing for Ocean (ACSPO) sea-surface temperature (SST) fields using VIIRS data downloaded at the CIMSS Direct Broadcast antenna (and processed using <a href=\"https:\/\/cimss.ssec.wisc.edu\/cspp\/\">CSPP<\/a> and <a href=\"https:\/\/www.ssec.wisc.edu\/software\/polar2grid\/\">Polar2Grid<\/a> software).  The toggle above shows the Day Night Band image (there are some clouds over eastern Lake Superior, and ice is apparent near\/around the Apostle Islands and along the Wisconsin and western Upper Peninsula shorelines) with and without an overlain SST analysis over Lake Superior.  SST values over Superior range from 32<sup>o<\/sup> F (white in the enhancement) to a brisk 37<sup>o<\/sup> F (green in the enhancement).  Of interest in the SST analysis is the surface front extending to the northeast of Keewenaw Point:  Green values to the east are just above 37<sup>o<\/sup> F; cyan values to the west are cooler than 36<sup>o<\/sup> F.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"626\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026-1024x626.png\" alt=\"\" class=\"wp-image-50337\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026-1024x626.png 1024w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026-300x184.png 300w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026-768x470.png 768w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/SuperiorVIIRS_DNB_SST-20230208_080026.png 1504w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">Day Night Band and ACSPO SSTs over Lake Superior, 0800 UTC on 8 February 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>Fewer clouds were obvious over Lake Michigan.  Lake Michigan is shows warmer surface temperatures, near 40<sup>o<\/sup> F (red enhancement) to the northeast of Chicago.  Note the presence of ice over Green Bay.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1504\" height=\"920\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/02\/MichiganVIIRS_DNB_SST-20230208_0800toggle.gif\" alt=\"\" class=\"wp-image-50338\"\/><figcaption class=\"wp-element-caption\">VIIRS Day Night Band visible (0.70 \u00b5m) imagery and ACSPO SST analysis over Lake Michigan, 0800 UTC on 8 February 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>You can also view imagery over the Great Lakes at the <a href=\"https:\/\/cimss.ssec.wisc.edu\/viirs\/imagery-viewer\/\">CIMSS VIIRS Imagery Viewer<\/a> that packages imagery from the <a href=\"https:\/\/ftp.ssec.wisc.edu\/pub\/eosdb\/\">CIMSS Direct Broadcast site<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Predominantly clear skies and a waning Full Moon (the Full Moon was on 5 February) allowed for both Day Night Band imagery of the surface and Advanced Clear-Sky Processing for Ocean (ACSPO) sea-surface temperature (SST) fields using VIIRS data downloaded at the CIMSS Direct Broadcast antenna (and processed using CSPP and Polar2Grid software). The toggle [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":50337,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[78,48,5],"tags":[],"class_list":["post-50335","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-noaa-20","category-viirs","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50335","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=50335"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50335\/revisions"}],"predecessor-version":[{"id":50343,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50335\/revisions\/50343"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/50337"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=50335"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=50335"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=50335"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}