{"id":55917,"date":"2023-12-12T17:05:14","date_gmt":"2023-12-12T17:05:14","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=55917"},"modified":"2023-12-12T17:48:27","modified_gmt":"2023-12-12T17:48:27","slug":"heavy-rain-and-lightning-over-american-samoa","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/55917","title":{"rendered":"Heavy Rain and lightning over American Samoa"},"content":{"rendered":"\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/G18Band13TPW-20231211_0000_to_1212_1600anim.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1228\" height=\"854\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/G18Band13TPW-20231211_0000_to_1212_1600anim.gif\" alt=\"\" class=\"wp-image-55925\"\/><\/a><figcaption class=\"wp-element-caption\">GOES-18 Band 13 Clean Window Infrared Imagery on top of Clear-sky Total Precipitable Water, scaled from 1-2.5&#8243;, hourly from 0000 UTC 11 December to 1600 UTC 12 December 2023 (click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>National Weather Service Pago Pago Facebook posts on 11 December describe an atmosphere primed for <a href=\"https:\/\/www.facebook.com\/NWSPagoPago\/posts\/pfbid02JLSQyN3JTasBo8xQWrmv2nQjHiw11JY9xZcnnjpxKk5TdebgTAi38YeeAYrfTf6wl?__cft__[0]=AZVGWp4LEmO_GY6hpmZp0zKd9qeDOC1SRYiOBwrklXZE-1SzaWNJvk0kPvxK6rVGZJgoY_zKmXmqNhBlSZ-rwWGgJ2QDzxJ4QOg0aYZAHSOEldsw056Z5Lmd60Ox-Ol_A3lRDJ8RPBvaffjcUWJHD1bog1rSiZyB6G9O_nMyR6iJHh_krxOMxoO64JfzMBN7u90&amp;__tn__=%2CO%2CP-R\">heavy rain<\/a> and <a href=\"https:\/\/www.facebook.com\/NWSPagoPago\/posts\/pfbid0AvonVHp5gsEU2byoEMJW4P3S2eszzYyWvo3CSBNEraWwLe9Le6PmdgARQBbjuYuel?__cft__[0]=AZVcB0aiewR4LUCgDQalLYlzJh4owTwzNNq13wBZqqvhnZp54R7pNZpLxJF1JJUZSsSvv_jJZQQJ51R8D1_bBQPkagDsLEuVVKvGOm9HLShFwKN1Df8A9wWiCbvkASuQFbAE4CZcP5ZrPyAOdxPLEBYop3RNa9Czz4WjbtS7lsb5qvpxjje9PaAQRErOwb-6MqQ&amp;__tn__=%2CO%2CP-R\">lightning<\/a>, the latter Facebook also shown below.  Band 13 animation, above, shows persistent deep convection over the Samoan Islands.  The convection develops and drifts southward.<\/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\/2023\/12\/FBScreenShot_11Dec.png\"><img loading=\"lazy\" decoding=\"async\" width=\"742\" height=\"671\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/FBScreenShot_11Dec.png\" alt=\"\" class=\"wp-image-55918\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/FBScreenShot_11Dec.png 742w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/FBScreenShot_11Dec-300x271.png 300w\" sizes=\"auto, (max-width: 742px) 100vw, 742px\" \/><\/a><figcaption class=\"wp-element-caption\">Facebook post from National Weather Service office in Pago Pago, 11 December 2023 (click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>MIMIC Total Precipitable Water over the south Pacific shows moist air over Samoa being drawn poleward in an atmospheric river.  (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/55848\">Cyclone Jasper<\/a> (see <a href=\"https:\/\/www.youtube.com\/watch?v=vzh4VUAab8w\">this<\/a> also) along the northeast coast of Australia is also apparent).  <\/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\/2023\/12\/comp20231210.0000_to_1212.1500anim.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"470\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/comp20231210.0000_to_1212.1500anim.gif\" alt=\"\" class=\"wp-image-55919\"\/><\/a><figcaption class=\"wp-element-caption\">MIMIC Total Precipitable Water over the South Pacific, 0000 UTC on 10 December &#8211; 1500 UTC on 12 December 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>ASCAT Scatterometry data from Metop-B, below (<a href=\"https:\/\/manati.star.nesdis.noaa.gov\/datasets\/ASCATBData.php\">source<\/a>), shows strong surface convergence over the Samoan Islands.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/MetopB_Descending_2027_11Dec2023.png\"><img loading=\"lazy\" decoding=\"async\" width=\"740\" height=\"650\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/MetopB_Descending_2027_11Dec2023.png\" alt=\"\" class=\"wp-image-55926\" style=\"width:1086px;height:auto\" srcset=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/MetopB_Descending_2027_11Dec2023.png 740w, https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/MetopB_Descending_2027_11Dec2023-300x264.png 300w\" sizes=\"auto, (max-width: 740px) 100vw, 740px\" \/><\/a><figcaption class=\"wp-element-caption\">Advanced Scatterometer (ASCAT) imagery from Metop-B, 2027 UTC on 11 December 2023 (Click to enlarge)<\/figcaption><\/figure>\n\n\n\n<p>.<\/p>\n\n\n\n<p>Lightning events on 12 December are shown below <a href=\"https:\/\/www.star.nesdis.noaa.gov\/goes\/sector_band.php?sat=G17&amp;sector=tsp&amp;band=13&amp;length=12\">from this link<\/a>.  In this case, GOES-18 Flash Extent Density field are overlain on GeoColor imagery.  Abundant lightning is occurring north and south of the Samoan Islands.  An Airmass RGB animation from the same website (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/G18_sector_tsp_AirMass_60fr_20231212-1232.gif\">here<\/a>), shows the persistent southward motion of moist tropical air over the Samoan Islands.<\/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\/2023\/12\/G18_sector_tsp_EXTENT3_84fr_20231212-1234.gif\"><img loading=\"lazy\" decoding=\"async\" width=\"1800\" height=\"1080\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2023\/12\/G18_sector_tsp_EXTENT3_84fr_20231212-1234.gif\" alt=\"\" class=\"wp-image-55929\"\/><\/a><figcaption class=\"wp-element-caption\">GeoColor imagery and Flash Extent Density, 1016-1711 UTC on 12 December 2023 (Click to enlarge)<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>National Weather Service Pago Pago Facebook posts on 11 December describe an atmosphere primed for heavy rain and lightning, the latter Facebook also shown below. Band 13 animation, above, shows persistent deep convection over the Samoan Islands. The convection develops and drifts southward. MIMIC Total Precipitable Water over the south Pacific shows moist air over [&hellip;]<\/p>\n","protected":false},"author":19,"featured_media":55918,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76,114,115,58,25],"tags":[],"class_list":["post-55917","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-glm","category-goes-18","category-lightningcast","category-metop","category-satellite-winds"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55917","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=55917"}],"version-history":[{"count":5,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55917\/revisions"}],"predecessor-version":[{"id":55935,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/55917\/revisions\/55935"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/55918"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=55917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=55917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=55917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}