{"id":53234,"date":"2023-07-03T23:05:00","date_gmt":"2023-07-03T23:05:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=53234"},"modified":"2023-10-13T19:43:48","modified_gmt":"2023-10-13T19:43:48","slug":"actinoform-cloud-produces-light-rain-in-hawaii","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/53234","title":{"rendered":"Actinoform cloud produces light rain in Hawai`i"},"content":{"rendered":"

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GOES-18 Nighttime Microphysics RGB and daytime True Color RGB images [click to play MP4 animation]<\/p><\/div>GOES-18 (GOES-West)<\/em> Nighttime Microphysics RGB<\/strong><\/a> and daytime True Color RGB images from the CSPP GeoSphere<\/strong><\/a> site (above)<\/strong><\/em> displayed the cyclonic circulation of an actinoform<\/strong><\/a> cloud feature as it moved westward toward Hawai`i on 03 July 2023.<\/p>\n

A closer view using GOES-18 “Red” Visible (0.64 \u00b5m<\/strong><\/a>) and Day Cloud Phase Distinction RGB<\/strong><\/a> images (below)<\/strong><\/em> showed the actinoform cloud as it approached the island of Oahu. 15-minute METAR surface reports revealed that one of the actinoform’s “spiral bands” produced brief (20-30 minute) periods of light rain and\/or drizzle — first at Kaneohe Bay (PHNG<\/strong><\/a>) beginning around 0201 UTC<\/strong><\/a>, and then at Wheeler Air Force Base (PHHI<\/strong><\/a>) beginning around 0331 UTC<\/strong><\/a> — as it passed over the island.<\/p>\n

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GOES-18 “Red” Visible (0.64 \u00b5m) and Day Cloud Phase Distinction RGB images [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>According to the Day Cloud Phase Distinction RGB Quick Guide<\/strong><\/a>, shades of green generally denote cloud tops that are beginning to glaciate — but in this case, a GOES-18 Day Cloud Phase Distinction RGB image at 2301 UTC (below)<\/strong><\/em> included cursor-sampled values of RGB components along with the corresponding Cloud Top Phase and Cloud Top Height derived products at that same location. Since cloud-top 10.3 \u00b5m infrared brightness temperatures at that cursor location were quite warm (15.27\u00baC), derived products indicated that the Cloud Top Phase was Water (as opposed to a Mixed water\/ice phase, which is often associated with cloud features exhibiting similar shades of green in this particular RGB).<\/p>\n

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GOES-18 Day Cloud Phase Distinction RGB image at 2301 UTC, with cursor-sampled values of RGB components along with the corresponding Cloud Top Phase and Cloud Top Height derived products [click to enlarge]<\/p><\/div>AWIPS Users: a variety of GOES RGB types combined with Derived Product Readouts is available under the Satellite -> Local Menu Items menu (below)<\/strong><\/em>.<\/p>\n

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GOES RGBs with Derived Product Readouts menu structure [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

GOES-18 (GOES-West) Nighttime Microphysics RGB and daytime True Color RGB images from the CSPP GeoSphere site (above) displayed the cyclonic circulation of an actinoform cloud feature as it moved westward toward Hawai`i on 03 July 2023. A closer view using GOES-18 “Red” Visible (0.64 \u00b5m) and Day Cloud Phase Distinction RGB images (below) showed the […]<\/p>\n","protected":false},"author":18,"featured_media":53241,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[114,151,45],"tags":[],"class_list":["post-53234","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-18","category-l2_readouts","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53234","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=53234"}],"version-history":[{"count":13,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53234\/revisions"}],"predecessor-version":[{"id":53250,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/53234\/revisions\/53250"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/53241"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=53234"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=53234"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=53234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}