{"id":2125,"date":"2009-03-11T19:25:47","date_gmt":"2009-03-11T19:25:47","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=2125"},"modified":"2010-05-20T20:30:58","modified_gmt":"2010-05-20T20:30:58","slug":"ice-floes-in-green-bay","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/2125","title":{"rendered":"Drifting ice field in Green Bay"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 visible images<\/p><\/div>\n

Strong northwesterly winds (gusting as high as 70 mph<\/strong> at Grand Marais in the Upper Peninsula of Michigan, and 57 mph<\/strong> at Washington Island in northeastern Wisconsin)<\/em> caused a large portion of the land-fast ice in the far northern portion of Green Bay to break away and begin drifting eastward toward Lake Michigan on 11 March 2009<\/strong><\/a>. Once the clouds cleared over that region, GOES-13 visible images (above)<\/strong><\/em> showed the large ice feature as it moved slowly eastward.<\/p>\n

According to the CIMSS Mesoscale Winds<\/a><\/strong> product (below),<\/strong><\/em> the speed of the ice field drift was in the 15-25 knot range. These wind vectors were generated by tracking targets on 3 consecutive GOES-12 visible images.<\/p>\n

\"GOES-12<\/a>

GOES-12 visible image + CIMSS mesoscale winds<\/p><\/div>\n

A false-color Red\/Green\/Blue (RGB) composite made using AWIPS images of the MODIS visible and the 2.1 \u00c2\u00b5m “Snow\/ice” channels (below)<\/strong><\/em> confirmed that this was indeed an ice feature — snow and ice are\u00c2\u00a0 strong absorbers at the 2.1 \u00c2\u00b5m wavelength, making snow cover (and especially ice features)<\/em> exhibit a darker red appearance on the false-color imagery. In contrast, the supercooled water droplet clouds appear as cyan to brighter white colored features. The ability to create these types of RGB images should be a new feature available on future releases of AWIPS-2.<\/p>\n

\"MODIS<\/a>

MODIS false color image (using Visible and Snow\/ice channels)<\/p><\/div>\n

250-meter resolution “true color” and “false color” images from the SSEC MODIS Today<\/strong><\/a> site (below)<\/strong><\/em> showed better detail of the ice field structure. Also note the long, narrow southwest-to-northeast oriented tornado damage path (from the 07 June 2007 tornado event<\/strong><\/a>)<\/em>, located\u00c2\u00a0 about 30 miles (48 km) inland to the west of Green Bay.<\/p>\n

\"MODIS<\/a>

MODIS 250-m resolution "true color" and "false color" images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Strong northwesterly winds (gusting as high as 70 mph at Grand Marais in the Upper Peninsula of Michigan, and 57 mph at Washington Island in northeastern Wisconsin) caused a large portion of the land-fast ice in the far northern portion of Green Bay to break away and begin drifting eastward toward Lake Michigan on 11 […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[19,11,8,12,45,25,5],"tags":[],"class_list":["post-2125","post","type-post","status-publish","format-standard","hentry","category-goes-12","category-goes-13","category-marine-weather","category-modis","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\/2125","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\/18"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=2125"}],"version-history":[{"count":26,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2125\/revisions"}],"predecessor-version":[{"id":5736,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/2125\/revisions\/5736"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=2125"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=2125"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=2125"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}