{"id":14772,"date":"2014-01-13T15:59:42","date_gmt":"2014-01-13T15:59:42","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=14772"},"modified":"2014-01-14T22:43:57","modified_gmt":"2014-01-14T22:43:57","slug":"viirs-daynight-band-ice-in-lake-erie-and-thunderstorms-over-the-gulf-of-mexico","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/14772","title":{"rendered":"VIIRS Day\/Night Band images: ice in Lake Erie, and thunderstorms over the Gulf of Mexico"},"content":{"rendered":"
\"Suomi<\/a>

Suomi NPP VIIRS 0.7 \u00c2\u00b5m Day\/ight Band, 11.45-3.74 \u00c2\u00b5m “fog\/stratus product”, and 11.45 \u00c2\u00b5m IR channel images<\/p><\/div>\n

With ample illumination by moonlight (the Moon was in the Waxing Gibbous phase, at 98% of full),<\/em> an AWIPS image of Suomi NPP VIIRS 0.7 \u00c2\u00b5m Day\/Night Band<\/strong><\/a> data was able to provide a “visible image at night” that showed the extensive ice coverage in Lake Erie at 06:42 UTC or 1:42 AM local time on 13 January 2014<\/strong><\/a> (above)<\/strong><\/em>. The mean ice concentration<\/strong><\/a> of Lake Erie was 76.8% at that time (up from less than 20%<\/strong><\/a> at the begining of January). Note that there was no signal of any potential fog\/stratus over the lake on the corresponding 11.45-3.74 \u00c2\u00b5m IR brightness temperature difference<\/strong><\/a> “fog\/stratus product”, and very little thermal contrast seen in the 11.45 \u00c2\u00b5m IR<\/strong><\/a> image.<\/p>\n

Farther to the south over the Gulf of Mexico, the 08:21 UTC or 2:21 AM local time VIIRS 0.7 \u00c2\u00b5m Day\/Night Band<\/strong><\/a> image (below)<\/strong><\/em> showed large thunderstorms, with cloud-top shadowing from overshooting tops as well as a few bright “lightning streaks” due to cloud illumination by intense lightning activity at the time the instrument was scanning the region. Overlays of cumulative 1-hour cloud-to-ground lightning strikes indicated over 2400 strikes ending at 08 UTC<\/strong><\/a>, and over 1800 strikes ending at 09 UTC<\/strong><\/a> over the area of the satellite scene. A comparison with the corresponding 11.45 \u00c2\u00b5m IR<\/strong><\/a> image showed that the coldest cloud-top IR brightness temperatures were -65\u00c2\u00ba C over the northern convective complex, and -73\u00c2\u00ba C over the southern convective complex.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel, 0.7 \u00c2\u00b5m Day\/Night Band, and 1-hour cloud-to-ground lightning strikes<\/p><\/div>\n

\n","protected":false},"excerpt":{"rendered":"

With ample illumination by moonlight (the Moon was in the Waxing Gibbous phase, at 98% of full), an AWIPS image of Suomi NPP VIIRS 0.7 \u00c2\u00b5m Day\/Night Band data was able to provide a “visible image at night” that showed the extensive ice coverage in Lake Erie at 06:42 UTC or 1:42 AM local time […]<\/p>\n","protected":false},"author":18,"featured_media":14779,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[30,49,48,5],"tags":[],"class_list":["post-14772","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lightning","category-suomi_npp","category-viirs","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14772","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=14772"}],"version-history":[{"count":13,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14772\/revisions"}],"predecessor-version":[{"id":14774,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14772\/revisions\/14774"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/14779"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=14772"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=14772"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=14772"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}