{"id":15455,"date":"2019-04-30T17:15:11","date_gmt":"2019-04-30T22:15:11","guid":{"rendered":"https:\/\/inside.nssl.noaa.gov\/ewp\/?p=15455"},"modified":"2019-04-30T18:02:36","modified_gmt":"2019-04-30T23:02:36","slug":"cell-merger-azshear-cpti-and-dmd-comparison","status":"publish","type":"post","link":"https:\/\/inside.nssl.noaa.gov\/ewp\/2019\/04\/30\/cell-merger-azshear-cpti-and-dmd-comparison\/","title":{"rendered":"Cell merger – AzShear, CPTI and DMD comparison"},"content":{"rendered":"

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Gonna take a look at SC merger\u00a0 noting two small SC storms WNW of KINX radar @ 2058UTC. Prob TOR with these storms ~ 25% at this time with generally weak AzShear with stronger northern storm.<\/p>\n

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2106 UTC – just before storm merger see uptick in Azshear (0-2 km) with slight increase in CPTI products (50-52 %).\u00a0 DMD output not providing any useful information on these storms at this time probably.\u00a0 ProbTor ~ 10%<\/p>\n

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After merger @ 2114 UTC although not much change in AzShear, CPTI probabilities do increase some to 55 to 60%. Note that only the XDMD mesocylone algorithm displays a mesocyclone icon at this time while legacy DMD products do not.<\/p>\n

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2126 UTC – ProbTor rapidly increased to 77% with marked increase in AzShear. CPTI products also near 70% (110 mph).\u00a0 Now all three DMD products display icon by this time.\u00a0 BUT the XDMD seemed to identify mesocyclone sooner than legacy products.\u00a0 This was encouraging.<\/p>\n

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2142 UTC – looks like storm looses organization as inflow may have been disrupted. AZshear becomes elongated with CPTI values falling notably.\u00a0 \u00a0Encouraging to note the character of AzShear (became elongated ) was consistent with the less organized storm (velocity structure).\u00a0 ProbTor falls to ~ 65%.\u00a0 Note the xDMD algorithm did still correctly identify shear couplet (SRM not shown) where legacy algorithm fails.\u00a0 \u00a0XDMD performed much better and and had greater temporal continuity than legacy product in this example. In this more complex storm interaction example appeared XDMD was able to better identify and retain areas of shear\/rotation compared to legacy.<\/p>\n

-Quik TWIP<\/p>\n

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

Gonna take a look at SC merger\u00a0 noting two small SC storms WNW of KINX radar @ 2058UTC. Prob TOR with these storms ~ 25% at this time with generally… <\/p>\n

Read more \u00bb<\/a><\/p>\n","protected":false},"author":139,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[10,1],"tags":[54,53,35],"class_list":["post-15455","post","type-post","status-publish","format-standard","hentry","category-live-blogs","category-news","tag-azshear","tag-cpti","tag-probsevere"],"_links":{"self":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/15455","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/users\/139"}],"replies":[{"embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/comments?post=15455"}],"version-history":[{"count":3,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/15455\/revisions"}],"predecessor-version":[{"id":15477,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/posts\/15455\/revisions\/15477"}],"wp:attachment":[{"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/media?parent=15455"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/categories?post=15455"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/inside.nssl.noaa.gov\/ewp\/wp-json\/wp\/v2\/tags?post=15455"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}