{"id":50218,"date":"2023-02-04T17:03:15","date_gmt":"2023-02-04T17:03:15","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=50218"},"modified":"2023-02-07T19:36:50","modified_gmt":"2023-02-07T19:36:50","slug":"great-lakes-ice-extent","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/50218","title":{"rendered":"Great Lakes Ice Extent"},"content":{"rendered":"\n
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Great Lakes via VIIRS True Color imagery on February 2nd revealed ample open waters<\/figcaption><\/figure>\n<\/div>\n\n\n\n
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Great Lakes via VIIRS False Color imagery on February 2nd revealed ample open waters<\/figcaption><\/figure>\n<\/div>\n<\/div>\n\n\n\n

According to NOAA’s Great Lakes Surface Environmental Analysis (GLSEA<\/em>) the Great Lakes were 11.6% ice covered on February 2nd when an arctic air mass was descending southward over the region. The cold air boosted ice coverage to 14.7% on February 3rd, less than half of the average extent (1973-2022) of 34% for February 3rd. This meant ample open waters for lake-effect clouds and snow, per the 5-hour GOES East animation below.<\/p>\n\n\n\n

Ice extent on the Great Lakes is highly variable. In the past five years ice coverage on February 3rd has been as low as 5.3% in 2020 and as high as 40.9% in 2019. Records have been kept since 1973. (Check current conditions via https:\/\/coastwatch.glerl.noaa.gov\/ice.html<\/a><\/em>) <\/p>\n\n\n\n

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GLSEA comparison maps of Great Lakes ice coverage from 2023 (top left) to 2019 (bottom right).<\/figcaption><\/figure>\n\n\n\n

In spite of wide year-to-year variability, studies show a downward trend in Great Lakes ice coverage since records began. <\/p>\n\n\n\n

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According to NOAA’s Great Lakes Surface Environmental Analysis (GLSEA) the Great Lakes were 11.6% ice covered on February 2nd when an arctic air mass was descending southward over the region. The cold air boosted ice coverage to 14.7% on February 3rd, less than half of the average extent (1973-2022) of 34% for February 3rd. This […]<\/p>\n","protected":false},"author":28,"featured_media":50224,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,77,78,5],"tags":[],"class_list":["post-50218","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-jpss-1","category-noaa-20","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50218","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\/28"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=50218"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50218\/revisions"}],"predecessor-version":[{"id":50295,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/50218\/revisions\/50295"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/50224"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=50218"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=50218"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=50218"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}