{"id":10774,"date":"2012-07-06T18:24:38","date_gmt":"2012-07-06T18:24:38","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=10774"},"modified":"2012-07-06T18:43:12","modified_gmt":"2012-07-06T18:43:12","slug":"mesoscale-convective-system-exhibiting-cloud-top-gravity-waves","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/10774","title":{"rendered":"Mesoscale Convective System exhibiting cloud-top gravity waves and transverse banding"},"content":{"rendered":"
\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR + 0.7 \u00c2\u00b5m Day\/Night Band images<\/p><\/div>\n

A comparison of AWIPS images of 375-meter resolution (projected onto a 1-km AWIPS grid)<\/em> Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel data with the corresponding 0.7 \u00c2\u00b5m VIIRS Day\/Night Band (above)<\/strong><\/em> showed a large Mesocale Convective System (MCS) with an expansive cold cloud shield (exihibiting IR brightness temperatures as cold as -84 C)<\/em> over parts of North Dakota and South Dakota at 08:43 UTC (3:43 AM local time)<\/em> on 06 July 2012<\/strong>. A number of well-defined cloud-top gravity waves could also be seen propagating northward and northeastward outward away from the core of the storm. There was a damaging wind report at 09:03 UTC in south-central North Dakota:\u00c2\u00a0\u00c2\u00a0SW WIND GUST OF 68 MPH AT 403 AM CDT...AND N WIND GUST OF 68 MPH AT 408 AM CDT<\/tt><\/strong>.<\/tt> Illumination from a full moon made convective overshooting tops and some of these cloud-top gravity waves easy to see on the Day\/Night Band image.
\n<\/tt><\/p>\n

About 2 hours later, these cloud-top gravity waves wee more difficult to identify on a 1-km resolution POES AVHRR 10.8 \u00c2\u00b5m IR image (below)<\/strong><\/em> at 10.32 UTC (5:32 AM local time),<\/em> although a few could still be seen in eastern North Dakota, western Minnesota and southern Manitoba. There was a wind gust to 51 knots (59 mph)<\/em> reported at 10:40 UTC in southeastern North Dakota.<\/p>\n

\"POES<\/a>

POES AVHRR 10.8 \u00c2\u00b5m IR channel image + METAR surface reports and severe wind reports<\/p><\/div>\n

As the MCS began to dissipate around sunrise, a vivid display of transverse banding cirrus filaments could be seen on 1-km resolution GOES-13 0.63 \u00c2\u00b5m visible channel images (below; click image to play animation)<\/strong><\/em> forming along the southern periphery of the storm over eastern South Dakota, southern Minnesota, and far northern Iowa. This transverse banding is a satellite signature of potential high-altitude turbulence — and there was one pilot report of moderate turbulence at 38,00 feet in eastern South Dakota.<\/p>\n

\"GOES-13<\/a>

GOES-13 0.63 \u00c2\u00b5m visible channel images (click image to play animation)<\/p><\/div>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

A comparison of AWIPS images of 375-meter resolution (projected onto a 1-km AWIPS grid) Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR channel data with the corresponding 0.7 \u00c2\u00b5m VIIRS Day\/Night Band (above) showed a large Mesocale Convective System (MCS) with an expansive cold cloud shield (exihibiting IR brightness temperatures as cold as -84 C) over parts […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22,21,11,26,3,49,48],"tags":[],"class_list":["post-10774","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-aviation","category-goes-13","category-poes","category-severe-convection","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10774","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=10774"}],"version-history":[{"count":5,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10774\/revisions"}],"predecessor-version":[{"id":10777,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/10774\/revisions\/10777"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=10774"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=10774"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=10774"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}