{"id":40008,"date":"2021-02-20T23:59:37","date_gmt":"2021-02-20T23:59:37","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=40008"},"modified":"2021-02-25T21:54:56","modified_gmt":"2021-02-25T21:54:56","slug":"viirs-imagery-shows-ice-cover-on-great-lakes","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/40008","title":{"rendered":"VIIRS Imagery shows ice cover on Great Lakes"},"content":{"rendered":"<div id=\"attachment_40009\" style=\"width: 635px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/VIIRSTrueColor_G16Band05-20210220_1843toggle.gif\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-40009\" class=\"wp-image-40009\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/VIIRSTrueColor_G16Band05-20210220_1843toggle.gif\" alt=\"\" width=\"625\" height=\"497\" \/><\/a><p id=\"caption-attachment-40009\" class=\"wp-caption-text\">Suomi-NPP VIIRS true-color imagery (1843 UTC) and GOES-16 Band 5 (1.61 \u00b5m) imagery (1841 UTC) on 20 February 2021 (Click to enlarge)<\/p><\/div>\n<p>An uncommon somewhat clear day on 20 February 2021 allowed VIIRS on Suomi-NPP to provide a true-color image of all 5 Great Lakes. The <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/VIIRSTrueColorAWIPS-20210220_184328.png\">true-color image above<\/a> is shown in a toggle with <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/G16ABIBand05-20210220_184328.png\">GOES-16 &#8220;Snow-Ice&#8221; Band 5 near-infrared data (1.61 \u00b5m)<\/a> that allows for discrimination between clouds made up of water droplets (bright white) and underlying snow\/ice (darker grey).\u00a0 Much of western Lake Superior shows ice:\u00a0 highly reflective in the true color imagery and much darker in the snow\/ice channel (but not quite as dark as open water).\u00a0 Lake Superior has about 50% ice coverage (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/s2020_2021_ice_20Feb2021.gif\">this figure<\/a>, originally from <a href=\"https:\/\/www.glerl.noaa.gov\/data\/ice\/#currentConditions\">this website<\/a>).\u00a0 Western Lake Michigan shows little ice coverage (except over Green Bay);\u00a0 ice coverage on Michigan <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/m2020_2021_ice_20Feb2021.gif\">is less than 30%<\/a>.\u00a0 \u00a0Lake Erie is the most ice-covered of the Lakes:\u00a0 <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/02\/e2020_2021_ice_20Feb2021.gif\">around 80% ice-covered<\/a>.\u00a0 Recent northwesterly winds have moved the pack ice away from the northern shore (except for the far western basin).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>An uncommon somewhat clear day on 20 February 2021 allowed VIIRS on Suomi-NPP to provide a true-color image of all 5 Great Lakes. The true-color image above is shown in a toggle with GOES-16 &#8220;Snow-Ice&#8221; Band 5 near-infrared data (1.61 \u00b5m) that allows for discrimination between clouds made up of water droplets (bright white) and [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":40011,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,49,5],"tags":[],"class_list":["post-40008","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-suomi_npp","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40008","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=40008"}],"version-history":[{"count":3,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40008\/revisions"}],"predecessor-version":[{"id":40018,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/40008\/revisions\/40018"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/40011"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=40008"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=40008"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=40008"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}