{"id":41164,"date":"2021-06-17T23:50:23","date_gmt":"2021-06-17T23:50:23","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=41164"},"modified":"2021-06-19T19:06:59","modified_gmt":"2021-06-19T19:06:59","slug":"rapid-convective-initiation-and-nucaps-profiles-in-the-upper-midwest","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/41164","title":{"rendered":"Rapid Convective Initiation and NUCAPS Profiles in the upper Midwest"},"content":{"rendered":"
\"\"<\/a>

NUCAPS Sounding Availability, 1745 and 1927 UTC on 17 June 2021. Note the overlapping coverage in eastern Iowa (Click to enlarge)<\/p><\/div>\n

A favorable orbit geometry on NOAA-20 on 17 June 2021 meant that portions of the upper Midwest received NUCAPS soundings 90 minutes apart. This is an ideal way to monitor destabilization on a day when SPC has predicted an enhanced risk of severe weather, as shown below and at this link<\/a>.<\/p>\n

\"\"<\/a>

SPC Convective outlook, 2000 UTC on 17 June 2021 (Click to enlarge)<\/p><\/div>\n

Compare the sounding at 42\u00ba N, 92\u00ba W from ~1800 UTC<\/a> to the one from ~1930 UTC<\/a>, below.\u00a0 Destabilization is apparent;\u00a0 the later profile has a lower LCL and lower LFC, and moisture has increased.<\/p>\n

\"\"<\/a>

NUCAPS Profiles near 42\u00ba N, 92\u00ba W at 1800 and 1930 UTC, 17 June 2021 (Click to enlarge)<\/p><\/div>\n

This surface plot from 2000 UTC<\/a> suggests that the NUCAPS profile at ~1930 UTC has a boundary layer that is too cool and too dry.\u00a0 When the sounding values are edited<\/a> — the lowest 3 layers were warmed and moistened — to better match the plotted observations, the sounding CAPE increased, and the LCL\/LFC dropped even farther.<\/p>\n

\"\"<\/a>

Original and modified NUCAPS profile at 42.14\u00ba\u00ba N, 91.54 W, ~1930 UTC on 17 June 2021 (Click to enlarge)<\/p><\/div>\n

The convection developed rapidly.\u00a0 The every-90-minutes toggle below (GOES-16 Visible Imagery at 2000, 2130, 2300 UTC) shows that, and the Day Cloud Phase Distinction RGB at the bottom (from 1901-2356 UTC) does too.<\/p>\n

\"\"<\/a>

GOES-16 Band 2 Visible (0.64 \u00b5m) Imagery, 2001, 2136, 2301 UTC on 17 June 2021 (Click to enlarge)<\/p><\/div>\n

\"\"<\/a>

GOES-16 Day Cloud Phase Distinction RGB, 1901 – 2306 UTC on 17 June 2021 (Click to animate)<\/p><\/div>\n

\n

A low-level water vapor (GOES-16 Band 10, 7.3 \u00b5m) infrared imagery animation, below<\/a>, from CSPP Geosphere (here is a link that will show the animation in CSPP GeoSphere<\/a> until about the end of June), shows evidence of a northwestward-propagating gravity wave that might have initiated convection.\u00a0 This feature first interacts with convection over far southeastern Iowa, and then with a southwest-to-northeast line of convection that developed.<\/p>\n

https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2021\/06\/CSPP-GeoSphere-Google-Chrome-2021-06-19-13-49-50.mp4<\/a><\/video><\/div>\n","protected":false},"excerpt":{"rendered":"

A favorable orbit geometry on NOAA-20 on 17 June 2021 meant that portions of the upper Midwest received NUCAPS soundings 90 minutes apart. This is an ideal way to monitor destabilization on a day when SPC has predicted an enhanced risk of severe weather, as shown below and at this link. Compare the sounding at […]<\/p>\n","protected":false},"author":19,"featured_media":41166,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,78,83,3],"tags":[],"class_list":["post-41164","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-noaa-20","category-nucaps","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41164","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=41164"}],"version-history":[{"count":9,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41164\/revisions"}],"predecessor-version":[{"id":41208,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/41164\/revisions\/41208"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/41166"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=41164"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=41164"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=41164"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}