{"id":17504,"date":"2015-01-07T23:59:33","date_gmt":"2015-01-07T23:59:33","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=17504"},"modified":"2015-01-08T23:08:09","modified_gmt":"2015-01-08T23:08:09","slug":"lake-effect-snow-band-from-lake-huron-brings-heavy-snow-to-pennsylvania","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/17504","title":{"rendered":"Lake effect snow band from Lake Huron brings heavy snow to Pennsylvania"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 0.63 \u00b5m visible channel images (click to play animation)<\/p><\/div>\n

McIDAS images of GOES-13<\/strong> 0.63 \u00b5m visible channel data with overlays of surface weather type (above; click image to play animation)<\/strong><\/em> showed a large lake effect cloud band that had formed over Lake Huron, moved inland across southern Ontario, and then became further lake-enhanced as it moved over Lake Erie and across northwestern Pennsylvania on 07 January 2015<\/strong><\/a>. The report of heavy (4-star) snow in far northwestern Pennsylvania was at Meadville — it reduced surface visibility there to 1.25 miles at times, and produced at least 6 inches of snowfall at that location. To the north of Meadville, 8.5 inches of snow were reported at Edinboro.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00b5m visible image, with surface METARs, RTMA winds, and frontal boundaries<\/p><\/div>\n

AWIPS images of Suomi NPP VIIRS 0.64 \u00b5m visible channel data are shown with overlays of surface METARs, RTMA winds, and frontal boundaries at 17:39 UTC (above)<\/strong><\/em> and 19:19 UTC (below)<\/strong><\/em>. The RTMA surface winds showed that there was low-level convergence in the vicinity of the weakening cold frontal boundary\/surface trough that was sagging southward and southwestward across the region (animation<\/strong><\/a>) — this convergence may have helped to maintain the cloud band as it continued to move southeastward across Lake Erie during the afternoon hours. Meadeville PA is station identifier KGKJ.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00b5m visible image, with surface METARs, RTMA winds, and frontal boundaries<\/p><\/div>\n

Suomi NPP VIIRS<\/strong> 11.45 \u00b5m IR channel images (below)<\/strong><\/em> showed that the coldest cloud-top IR brightness temperatures over both the Ontario and Pennsylvania portions of the band were -36\u00ba C (lighter green color enhancement)<\/em> — at London, Ontario (CYXU), embedded towering cumulus (coded TCU EMBD) were reported at both 18 UTC<\/strong><\/a> and 19 UTC<\/strong><\/a>.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00b5m IR channel images<\/p><\/div>\n

The Terra MODIS<\/strong> Sea Surface Temperature product around 18:11 UTC (below)<\/strong><\/em> showed that Lake Erie water temperatures were still as warm as the middle 30s F (blue)<\/em> on either side of the blacked-out lake effect\/lake enhanced cloud band — so moving an arctic air mass with 850 hPa temperatures colder than -20\u00ba C or -4\u00ba F over that water yielded a sufficient “delta-T” value to promote further enhancement\/growth of the snow-producing cloud band which originated over Lake Huron.<\/p>\n

\"MODIS<\/a>

MODIS Sea Surface Temperature product<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

McIDAS images of GOES-13 0.63 \u00b5m visible channel data with overlays of surface weather type (above; click image to play animation) showed a large lake effect cloud band that had formed over Lake Huron, moved inland across southern Ontario, and then became further lake-enhanced as it moved over Lake Erie and across northwestern Pennsylvania on […]<\/p>\n","protected":false},"author":18,"featured_media":17505,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[11,12,49,48,5],"tags":[],"class_list":["post-17504","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-13","category-modis","category-suomi_npp","category-viirs","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/17504","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=17504"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/17504\/revisions"}],"predecessor-version":[{"id":17512,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/17504\/revisions\/17512"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/17505"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=17504"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=17504"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=17504"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}