{"id":24506,"date":"2017-07-17T17:37:35","date_gmt":"2017-07-17T17:37:35","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=24506"},"modified":"2019-08-25T21:51:08","modified_gmt":"2019-08-25T21:51:08","slug":"mesoscale-convective-vortex-over-arizona","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/24506","title":{"rendered":"Mesoscale Convective Vortex over Arizona"},"content":{"rendered":"

\"Terra<\/a>

Terra MODIS Infrared Window (11.0 \u00b5m)<\/em> image, with SPC storm reports of severe winds plotted in cyan [click to enlarge]<\/p><\/div>* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing *<\/em><\/p>\n

Strong summer monsoon season thunderstorms developed over Arizona in the pre-dawn nighttime hours on 17 July 2017<\/strong><\/a>, producing damaging winds across the Phoenix area (SPC storm reports<\/strong><\/a>). A Terra MODIS Infrared Window (11.0 \u00b5m) image (above)<\/strong><\/em> revealed cloud-top brightness temperatures as cold as -77\u00baC at 0508 UTC.<\/p>\n

GOES-16 “Clean” Infrared Window (10.3 \u00b5m<\/strong><\/a>) images (below)<\/strong><\/em> showed the development and eventual dissipation of the overnight convection.<\/p>\n

\"GOES-16<\/a>

GOES-16 Infrared Window (10.3 \u00b5m)<\/em> images, with station identifiers plotted in yellow and SPC storm reports plotted in cyan [click to play animation]<\/p><\/div>During the following daytime hours, GOES-16 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) images (below)<\/strong><\/em> displayed the circulation of a Mesoscale Convective Vortex<\/strong><\/a> (MCV) as it propagated west-southwestward across southern Arizona. Note that surface dewpoint temperatures were in the upper 60s to low 70s F across southern Arizona, an indicator of the monsoon moisture that was in place across the region. The MCV appeared to play a role in helping to force the development of new thunderstorms later in the afternoon in the vicinity of the Arizona\/Mexico border.<\/p>\n

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m)<\/em> images, with hourly surface reports [click to play animation]<\/p><\/div>On the previous evening, a Mesoscale Discussion from SPC<\/strong><\/a> (below)<\/strong><\/em> mentioned the presence of weak deep-layer wind shear over the portion of Arizona affected by these nighttime severe thunderstorms — MCVs often form in such a low-shear environment.<\/p>\n

\"SPC<\/a>

SPC Mesoscale Discussion [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

* GOES-16 data posted on this page are preliminary, non-operational and are undergoing testing * Strong summer monsoon season thunderstorms developed over Arizona in the pre-dawn nighttime hours on 17 July 2017, producing damaging winds across the Phoenix area (SPC storm reports). A Terra MODIS Infrared Window (11.0 \u00b5m) image (above) revealed cloud-top brightness temperatures […]<\/p>\n","protected":false},"author":18,"featured_media":24509,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,12,3,71],"tags":[],"class_list":["post-24506","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-modis","category-severe-convection","category-terra"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/24506","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=24506"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/24506\/revisions"}],"predecessor-version":[{"id":34172,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/24506\/revisions\/34172"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/24509"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=24506"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=24506"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=24506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}