{"id":16192,"date":"2014-07-18T22:59:07","date_gmt":"2014-07-18T22:59:07","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=16192"},"modified":"2014-07-21T19:36:30","modified_gmt":"2014-07-21T19:36:30","slug":"large-hole-punch-cloud-over-wisconsin","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/16192","title":{"rendered":"Large “hole punch cloud” over Wisconsin"},"content":{"rendered":"

\"GOES-13<\/a>

GOES-13 0.63 \u00b5m visible (upper left), 3.9 \u00b5m shortwave IR (upper right), 10.7 \u00b5m IR (lower left), and 6.5 \u00b5m water vapor (lower right) images [click to play animation]<\/p><\/div>A large (approximately 50-mile diameter) “hole punch cloud” or “fall steak cloud” was seen over northwestern Wisconsin during the morning hours of 18 July 2014<\/strong><\/a>. An AWIPS 4-panel comparison of GOES-13 0.63 \u00b5m visible channel, 3.9 \u00b5m shortwave IR channel, 10.7 \u00b5m IR window channel, and 6.5 \u00b5m water vapor channel images (above; click image to play animation)<\/strong><\/em> showed that 10.7 \u00b5m IR cloud top brightness temperatures were not particularly cold with this feature (generally in the 0\u00ba C to -4\u00ba C range),<\/em> and while 3.9 \u00b5m shortwave IR brightness temperatures warmed within the broad cloud deck surrounding the hole punch cloud after sunrise (due to reflection of solar radiation off of water cloud droplets),<\/em> the center of the feature continued to exhibit colder (lighter gray enhancment)<\/em> IR brightness temperatures which suggests cloud glaciation.<\/p>\n

\"POES<\/a>

POES AVHRR Cloud Type, Cloud Top Height, and Cloud Top Temperature products at 09:32 UTC<\/p><\/div>\n

A comparison of CLAVR-x<\/strong><\/a> POES AVHRR Cloud Type, Cloud Top Height (CTH), and Cloud Top Temperature (CTT) products at 09:32 UTC or 4:32 am Central time (above)<\/strong><\/em> showed patches of water droplet clouds with CTH values in the 3-4 km range and CTT values in the 0\u00ba C to -4\u00ba C range.<\/p>\n

A similar comparison at 12:05 UTC or 7:05 am Central time (below)<\/strong><\/em> revealed two areas of “cirrus” cloud type (orange color enhancement)<\/em> exhibiting CTT values in the -35\u00ba to -40\u00ba C range (darker blue color enhancement)<\/em> along the northern and southern periphery of the forming hole punch cloud.<\/p>\n

\"POES<\/a>

POES AVHRR Cloud Type, Cloud Top Height, and Cloud Top Temperature prodcts at 12:05 UTC<\/p><\/div>\n

These ranges of AVHRR Cloud Top Temperature and Cloud Top Height values agreed well with the regional rawinsonde data from Davenport IA (KDVN), Minneapolis MN (KMPX) and Green Bay WI (KGRB) shown below.<\/p>\n

\"Davenport<\/a>

Davenport IA, Minneapolis MN, and Green Bay WI rawinsonde data at 12 UTC<\/p><\/div>\n

Terra MODIS visible and Cloud Phase products at 17:07 UTC or 12:07 pm Central time (below)<\/strong><\/em> indicated that a large area of glaciated ice cloud (salmon color enhancement)<\/em> existed in the center portion of the hole punch cloud feature.<\/p>\n

\"Terra<\/a>

Terra MODIS 0.65 \u00b5m visible image and Cloud Phase products<\/p><\/div>\n

The cause of this large hole punch or fall streak cloud feature — and the other similar but smaller features seen across the region — was likely aircraft that had either ascended or descended through the cloud layer; particles in the aircraft exhaust acted as ice condensation nuclei, causing the process of cloud glaciation to begin.<\/p>\n

\"GOES-15<\/a>

GOES-15 0.62 \u00b5m visible images [click to play animation]<\/p><\/div>GOES-15 imagery (above) shows the Hole Punch cloud from an oblique angle, and highlights how the region was overrun by smoke from wildfires in Canada. Smoke is most easily seen in visible satellite imagery when the sun is low in the sky, allowing for forward scatter. The smoke becomes less apparent in the imagery as the Sun rises. A similar animation for GOES-13 is below. Smoke is not quite so evident in this image because there is less forward scatter to GOES-13 over 75\u00ba W. Animations from both satellites show a hole punch cloud in Iowa as well.<\/p>\n

\"GOES-15<\/a>

GOES-15 0.62 \u00b5m visible images [click to play animation]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A large (approximately 50-mile diameter) “hole punch cloud” or “fall steak cloud” was seen over northwestern Wisconsin during the morning hours of 18 July 2014. An AWIPS 4-panel comparison of GOES-13 0.63 \u00b5m visible channel, 3.9 \u00b5m shortwave IR channel, 10.7 \u00b5m IR window channel, and 6.5 \u00b5m water vapor channel images (above; click image […]<\/p>\n","protected":false},"author":18,"featured_media":16206,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22,11,43,12,26],"tags":[],"class_list":["post-16192","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-avhrr","category-goes-13","category-goes-15","category-modis","category-poes"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/16192","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=16192"}],"version-history":[{"count":15,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/16192\/revisions"}],"predecessor-version":[{"id":16208,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/16192\/revisions\/16208"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/16206"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=16192"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=16192"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=16192"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}