{"id":13716,"date":"2013-08-19T23:59:15","date_gmt":"2013-08-19T23:59:15","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=13716"},"modified":"2013-09-05T22:05:26","modified_gmt":"2013-09-05T22:05:26","slug":"mesoscale-convective-vortex-over-nevada","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/13716","title":{"rendered":"Mesoscale Convective Vortex over Nevada"},"content":{"rendered":"

 <\/p>\n

\"GOES-13<\/a>

GOES-13 10.7 \u00c2\u00b5m IR channel images (click image to play animation)<\/p><\/div>\n

AWIPS images of 4-km resolution GOES-13 10.7 \u00c2\u00b5m IR channel data (above; click image to play animation)<\/strong><\/em> showed areas of nocturnal thunderstorms over southeastern California, western Arizona, and southern Nevada on 19 August 2013<\/strong><\/a>. These storms were initially producing numerous cloud-to-ground lightning strikes and exhibiting cloud-top IR brightness temperatures as cold as -66 C, but they began to dissipate toward sunrise as they continued to move northward.<\/p>\n

A comparison of 375-meter resolution (projected onto a 1-km AWIPS grid)<\/em> Suomi NPP VIIRS 0.7 \u00c2\u00b5m Day\/Night Band and 11.45 \u00c2\u00b5m IR channel images at 09:17 UTC (below)<\/strong><\/em> provided a good example of the “visible image at night” capability of the Day\/Night Band.<\/p>\n

\"Suomi<\/a>

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

The GOES-14 satellite had been placed into Super Rapid Scan Operations for GOES-R (SRSO-R)<\/strong><\/a> mode, and was providing images at 1-minute intervals on this day. Once the cirrus canopy from the dissipating thunderstorms eroded, the GOES-14 0.63 \u00c2\u00b5m visible channel images (below; click image to play animation; also available as a QuickTime movie<\/a>)<\/strong><\/em> revealed the presence of a small yet well-defined Mesoscale Convective Vortex (MCV)<\/strong><\/a> which continued to propagate northward across far eastern Nevada. Toward the end of the animation (20:57 UTC), the MCV appeared to be playing a role in the initiation of new convection along its northern (leading) edge.<\/p>\n

\"GOES-14<\/a>

GOES-14 0.63 \u00c2\u00b5m visible channel images (click image to play animation)<\/p><\/div>\n

A comparison of Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel and 11.45 \u00c2\u00b5m IR channel images at 20:43 UTC (below)<\/strong><\/em> showed that there were a couple of negative polarity cloud-to-ground lightning strikes (yellow)<\/em> being produced by the convection that developed along the leading edge of the MCV.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel and 11.45 \u00c2\u00b5m IR channel images<\/p><\/div>\n

 <\/p>\n

\"Blended<\/a>

Blended Total Precipitable Water product<\/p><\/div>\n

The Blended Total Precipitable Water (TPW) product (above, shown at 3-hour intervals)<\/strong><\/em> indicated that a plume of TPW values in the 30-38 mm or 1.2-1.5 inch range (varying shades of yellow)<\/em> were in place over the region where the thunderstorms had developed and moved northward. These monsoonal TPW values were 175-200% of normal for this area and this time of year (below)<\/strong><\/em>.<\/p>\n

\"Blended<\/a>

Blended Total Precipitable Water Percent of Normal product<\/p><\/div>\n

 <\/p>\n

\"GOES<\/a>

GOES IR image with GFS 850-500 hPa shear<\/p><\/div>\n

In addition, the 850-500 hPa wind shear values across the region at 12 UTC (above)<\/strong><\/em> and 18 UTC (below)<\/strong><\/em> were relatively low, creating a favorable environment for the MCV to persist for several hours.<\/p>\n

\"GOES<\/a>

GOES IR image with 850-500 hPa shear<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

  AWIPS images of 4-km resolution GOES-13 10.7 \u00c2\u00b5m IR channel data (above; click image to play animation) showed areas of nocturnal thunderstorms over southeastern California, western Arizona, and southern Nevada on 19 August 2013. These storms were initially producing numerous cloud-to-ground lightning strikes and exhibiting cloud-top IR brightness temperatures as cold as -66 C, […]<\/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":[40,49,48],"tags":[],"class_list":["post-13716","post","type-post","status-publish","format-standard","hentry","category-goes-14","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/13716","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=13716"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/13716\/revisions"}],"predecessor-version":[{"id":13825,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/13716\/revisions\/13825"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=13716"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=13716"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=13716"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}