{"id":61280,"date":"2024-10-26T00:07:00","date_gmt":"2024-10-26T00:07:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=61280"},"modified":"2024-10-27T23:09:40","modified_gmt":"2024-10-27T23:09:40","slug":"flooding-on-maui-and-oahu","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/61280","title":{"rendered":"Flooding on Maui and Oahu"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/G18Band13-20241026_1410_to_1027_0000anim.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1122\" height=\"854\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/G18Band13-20241026_1410_to_1027_0000anim.gif\" alt=\"\" class=\"wp-image-61281\"\/><\/a><figcaption class=\"wp-element-caption\">GOES-18 Band 13 (Clean Window infrared, 10.3 \u00b5m) imagery, 1411 UTC 25 October through 0001 UTC 26 October 2024 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>Infrared imagery over the Hawai&#8217;ian Islands on 25\/26 October, below, shows convective development over Maui and Oahu.  This was also a region of strong vertical wind shear, as shown below, as upper level cloud features were moving southeastward, low level clouds were moving to the west).<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/WindShear_200-850_1800UTC26October2024.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"900\" height=\"680\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/WindShear_200-850_1800UTC26October2024.gif\" alt=\"\" class=\"wp-image-61282\"\/><\/a><figcaption class=\"wp-element-caption\">850-200 mb wind shear, 1800 UTC on 26 October 2024 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>GREMLIN is a machine-learning tool that uses Bands 7, 9 and 13 fields from GOES-18 to emulate what NEXRAD radar echoes might look like. The animation below shows GOES-18 infrared data, and GREMLIN radar estimates. GREMLIN shows radar returns over both Oahu and Maui.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"2244\" height=\"854\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/G18Band13_GREMLIN-20241026_1410_to_1027_000022_2panelanim.gif\" alt=\"\" class=\"wp-image-61284\"\/><figcaption class=\"wp-element-caption\">GOES-18 Band 13 (Clean Window infrared, 10.3 \u00b5m) imagery (left) and GREMLIN Radar Emulation (dBz, right), 1411 UTC 25 October through 0001 UTC 26 October 2024 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>Strong convection with radar returns occur over both Maui and Oahu after 1500 UTC.  The National Weather Service in Honolulu issued Flash Flood Warnings at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/MauiFlashFloodWarning_1638UTC_26Oct2024.png\">1638 UTC for Maui<\/a> and at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/OahuFlashFloodWarning_1640UTC_26Oct2024.png\">1640 UTC for Oahu<\/a>.  The side-by-side animation, from 1501-1701 UTC shows the heavy rain indicated by GREMLIN as the Flash Flood Warning was issued.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/G18Band13_GREMLIN-20241026_1500_to_1700_2panel_step.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"2244\" height=\"854\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/G18Band13_GREMLIN-20241026_1500_to_1700_2panel_step.gif\" alt=\"\" class=\"wp-image-61288\"\/><\/a><figcaption class=\"wp-element-caption\">GOES-18 Band 13 (Clean Window infrared, 10.3 \u00b5m) imagery (left) and GREMLIN Radar Emulation (dBz, right), 1501-1701 UTC 25 October 2024 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>The Hilo sounding from 1200 UTC on 26 October, below, (<a href=\"https:\/\/weather.uwyo.edu\/cgi-bin\/sounding?region=naconf&amp;TYPE=GIF%3ASKEWT&amp;YEAR=2024&amp;MONTH=10&amp;FROM=2612&amp;TO=2612&amp;STNM=91285\">from here<\/a>) shows a moist atmosphere (55 mm of Total Precipitable Water) and mid-level instability.  MIMIC Total Precipitable Water (TPW) at that time (<a href=\"https:\/\/bin.ssec.wisc.edu\/pub\/mtpw2\/images\/tpw_nrl_colors\/epac\/202410\/comp20241026.120000_tpw.png\">here<\/a>) shows the horizontal distribution of the moisture.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/2024102612.91285.skewt_.parc_.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"640\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2024\/10\/2024102612.91285.skewt_.parc_.gif\" alt=\"\" class=\"wp-image-61289\"\/><\/a><figcaption class=\"wp-element-caption\">Upper-air sounding at Hilo HI (91285) at 1200 UTC on 26 October 2024 (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Infrared imagery over the Hawai&#8217;ian Islands on 25\/26 October, below, shows convective development over Maui and Oahu. This was also a region of strong vertical wind shear, as shown below, as upper level cloud features were moving southeastward, low level clouds were moving to the west). GREMLIN is a machine-learning tool that uses Bands 7, [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":61291,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[114,16],"tags":[],"class_list":["post-61280","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-18","category-heavy-rain-flooding"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/61280","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=61280"}],"version-history":[{"count":3,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/61280\/revisions"}],"predecessor-version":[{"id":61290,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/61280\/revisions\/61290"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/61291"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=61280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=61280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=61280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}