{"id":50083,"date":"2023-01-30T19:47:37","date_gmt":"2023-01-30T19:47:37","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=50083"},"modified":"2023-01-30T19:47:37","modified_gmt":"2023-01-30T19:47:37","slug":"lake-effect-bands-and-one-convergence-band-over-lake-superior","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/50083","title":{"rendered":"Lake effect Bands and one Convergence Band over Lake Superior"},"content":{"rendered":"\n
\"\"<\/a>
GOES-16 Day Cloud Type RGB, 1611 UTC – 1836 UTC on 30 January 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n

An animation of the Day Cloud Type RGB over Lake Superior on 30 January 2023, above, shows two prominent features: persistent lake-effect bands oriented west-northwest to east-southeast over the western four-fifths of the Lake (station KCMX on the Keewenaw peninsula, for example, observed heavy snow during this animation<\/a>), and a more north-south oriented convergence band that extends from the eastern Upper Peninsula of Michigan towards Marathon, ON. Note the northeast wind observation on Caribou Island in eastern Lake Superior.<\/p>\n\n\n\n

Advanced Scatterometer (ASCAT) winds from Metop-B (that had a timely descending overpass to view Lake Superior<\/a>), shown below, neatly show the convergent wind field. (Imagery from this website<\/a>). A 1500 UTC surface analysis (here<\/a>) shows a trough of low pressure over extreme eastern Lake Superior consistent with the region of northeast winds.<\/p>\n\n\n\n

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ASCAT winds from Metop-B, 1526 UTC on 30 January 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n

Note that the RGB used above is the Day Cloud Type RGB<\/a> (rather than the perhaps more well-known Day Cloud Phase Distinction<\/a>). In very cold airmasses, the ‘red’ band of the Day Cloud Phase Distinction RGB loses the ability to discriminate between the cold ground and higher cloud tops that might have a temperature similar to the Earth’s surface. The Day Cloud Type RGB uses Band 4 (the so-called ‘Cirrus Band’<\/a>) rather than Band 13. The toggle below compares Day Cloud Type and Day Cloud Phase Distinction RGBs at 1736 UTC. Day Cloud Type is doing a better job on this day in discriminating between the different cloud tops in the Lake-Effect bands and in the convergence band.<\/p>\n\n\n\n

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GOES-16 Day Cloud Type and Day Cloud Phase Distinction RGBs, 1736 UTC on 30 January 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n
\n\n\n\n

Thanks to Paul Ford, ECCC<\/a>, for drawing our attention to this interesting convergent band over Lake Superior!<\/p>\n","protected":false},"excerpt":{"rendered":"

An animation of the Day Cloud Type RGB over Lake Superior on 30 January 2023, above, shows two prominent features: persistent lake-effect bands oriented west-northwest to east-southeast over the western four-fifths of the Lake (station KCMX on the Keewenaw peninsula, for example, observed heavy snow during this animation), and a more north-south oriented convergence band […]<\/p>\n","protected":false},"author":19,"featured_media":50092,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,58,45,25,5],"tags":[],"class_list":["post-50083","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-metop","category-redgreenblue-rgb-images","category-satellite-winds","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50083","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=50083"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50083\/revisions"}],"predecessor-version":[{"id":50093,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50083\/revisions\/50093"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/50092"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=50083"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=50083"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=50083"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}