{"id":60464,"date":"2024-07-26T17:31:53","date_gmt":"2024-07-26T17:31:53","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=60464"},"modified":"2024-08-04T19:35:03","modified_gmt":"2024-08-04T19:35:03","slug":"clear-skies-over-the-great-lakes-4","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/60464","title":{"rendered":"Clear skies over the Great Lakes"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large is-resized\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114.png\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"677\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114-1024x677.png\" alt=\"\" class=\"wp-image-60465\" style=\"width:742px;height:auto\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114-1024x677.png 1024w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114-300x198.png 300w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114-768x508.png 768w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/ACSPOSSTsDNB-20240726_081114.png 1524w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/a><figcaption class=\"wp-element-caption\">NOAA-20 VIIRS Day Night Band visible (0.7 \u00b5m) imagery over the Great Lakes, 0811 UTC on 26 July 2024 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>A clear night over the Great Lakes &#8212; associated with a large High Pressure System, shown below in the 0600 UTC Surface Analysis &#8212; allowed a high-resolution view of Lake Surface Temperatures.  There are thin filaments of colder waters hugging different coastlines:  the eastern shore of Lake Michigan, the western shore of the Upper Peninsula of Michigan, the southern shore of Manitoulin Island in northern Lake Huron.  In these regions, off-shore winds are likely causing deeper (colder) sub-surface waters to upwell.  The National Weather Service in Duluth noticed a similar event on 23 July (<a href=\"https:\/\/x.com\/NWSduluth\/status\/1815747372556927207\">link to Twitter\/X<\/a>).<\/p>\n\n\n\n<p>Do you think those surface temperatures are warmer than normal as a whole?  The purple enhancement over Lake Superior shows temperatures cooler than 60<sup>o<\/sup>F.  Michigan and Huron show temperatures around 70<sup>o<\/sup>F (green) except for Saginaw Bay, where it&#8217;s in the mid-70s.  Western Lake Erie is 77-78 <sup>o<\/sup>F;  Lake Ontario is around 75<sup>o<\/sup>F at its warmest point.  GLERL maintains line plots of basin-wide averages:  <a href=\"https:\/\/apps.glerl.noaa.gov\/coastwatch\/webdata\/statistic\/pdf\/all_year_glsea_avg_s.pdf\">Superior<\/a>, <a href=\"https:\/\/apps.glerl.noaa.gov\/coastwatch\/webdata\/statistic\/pdf\/all_year_glsea_avg_m.pdf\">Michigan<\/a>, <a href=\"https:\/\/apps.glerl.noaa.gov\/coastwatch\/webdata\/statistic\/pdf\/all_year_glsea_avg_h.pdf\">Huron<\/a>, <a href=\"https:\/\/apps.glerl.noaa.gov\/coastwatch\/webdata\/statistic\/pdf\/all_year_glsea_avg_e.pdf\">Erie<\/a> and <a href=\"https:\/\/apps.glerl.noaa.gov\/coastwatch\/webdata\/statistic\/pdf\/all_year_glsea_avg_o.pdf\">Ontario<\/a>.  All five lakes are warmer on 25 July than the long-term average.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/sfc072624_101001.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"748\" height=\"562\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/07\/sfc072624_101001.gif\" alt=\"\" class=\"wp-image-60466\"\/><\/a><figcaption class=\"wp-element-caption\">Surface Analysis, 0600 UTC on 26 July 2024 (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>A clear night over the Great Lakes &#8212; associated with a large High Pressure System, shown below in the 0600 UTC Surface Analysis &#8212; allowed a high-resolution view of Lake Surface Temperatures. There are thin filaments of colder waters hugging different coastlines: the eastern shore of Lake Michigan, the western shore of the Upper Peninsula [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":60465,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[10,78],"tags":[],"class_list":["post-60464","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-interpretation","category-noaa-20"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/60464","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=60464"}],"version-history":[{"count":3,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/60464\/revisions"}],"predecessor-version":[{"id":60491,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/60464\/revisions\/60491"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/60465"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=60464"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=60464"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=60464"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}