{"id":59586,"date":"2024-06-01T23:59:00","date_gmt":"2024-06-01T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=59586"},"modified":"2024-06-03T21:02:00","modified_gmt":"2024-06-03T21:02:00","slug":"1-minute-imagery-to-monitor-deep-convection-for-flooding-potential-across-american-samoa","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/59586","title":{"rendered":"1-minute imagery to monitor deep convection for flooding potential across American Samoa"},"content":{"rendered":"

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1-minute GOES-18 “Clean” Infrared Window (10.3 \u00b5m) images, from 0127 UTC on 01 June to 0059 UTC on 02 June; NSTU denotes the location of Pago Pago, American Samoa [click to play MP4 animation]<\/p><\/div>1-minute\u00a0Mesoscale Domain Sector<\/strong><\/a>\u00a0GOES-18\u00a0(GOES-West)<\/em>\u00a0\u201cClean\u201d Infrared Window (10.3 \u00b5m<\/strong><\/a>) images\u00a0(above)<\/strong><\/em> displayed areas of convection that moved across American Samoa on 01 June 2024 (1-minute imagery was requested by NWS Pago Pago<\/strong><\/a> to monitor the approach of thunderstorms, since they had issued a Flood Watch for the islands — and they lack radar coverage). Although there was a break in the convective activity midway through the period, Pago Pago did receive heavy rainfall from thunderstorms that began to arrive just as the 1-minute imagery was ending (decoded surface observations<\/strong><\/a> | METARs<\/strong><\/a>); those thunderstorms produced 0.62 inch of rainfall in 3 hours and 0.94 inch of rainfall in 6 hours (plot of surface report data<\/strong><\/a>).<\/p>\n

A GOES-18 Infrared image showing a cold (-77.71\u00baC) thunderstorm overshooting top (not far to the west of American Samoa) at 0039 UTC on 02 June (below)<\/strong><\/em> included a cursor sample of the associated GOES-18 Cloud Top Height<\/strong><\/a> (50750 ft) and Rain Rate<\/strong><\/a> (1.90 in\/hr) derived products at that location.<\/p>\n

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GOES-18 “Clean” Infrared Window (10.3 \u00b5m) image showing a cold thunderstorm overshooting top west of American Samoa at 0039 UTC on 02 June, which includes a cursor sample of the associated GOES-18 Cloud Top Height (blue) and Rain Rate (red) derived products [click to enlarge]<\/p><\/div>During a break in widespread cloud coverage across the region, the 10-minute GOES-18 Total Precipitable Water<\/strong><\/a> (TPW) derived product (in cloud-free regions) (below)<\/strong><\/em> showed a NW-to-SE oriented corridor of TPW values in the 2.0 to 2.2 inch range (lighter shades of violet) across the Samoan Islands.<\/p>\n

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1-minute GOES-18 “Clean” Infrared Window (10.3 \u00b5m) images combined with the 10-minute Total Precipitable Water derived product (in cloud-free regions), from 1859 UTC on 01 June to 0000 UTC on 02 June; NSTU denotes the location of Pago Pago, American Samoa [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>However, the GOES-18 derived Total Precipitable Water values were less than the 2.62 inches obtained using rawinsonde data from Pago Pago, American Samoa at 0000 UTC on 02 June (below)<\/em><\/strong>.<\/p>\n

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Plot of rawinsonde data from Pago Pago, American Samoa at 0000 UTC on 02 June [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

1-minute\u00a0Mesoscale Domain Sector\u00a0GOES-18\u00a0(GOES-West)\u00a0\u201cClean\u201d Infrared Window (10.3 \u00b5m) images\u00a0(above) displayed areas of convection that moved across American Samoa on 01 June 2024 (1-minute imagery was requested by NWS Pago Pago to monitor the approach of thunderstorms, since they had issued a Flood Watch for the islands — and they lack radar coverage). Although there was a […]<\/p>\n","protected":false},"author":18,"featured_media":59602,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[114,16,151],"tags":[],"class_list":["post-59586","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-18","category-heavy-rain-flooding","category-l2_readouts"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/59586","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=59586"}],"version-history":[{"count":30,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/59586\/revisions"}],"predecessor-version":[{"id":59617,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/59586\/revisions\/59617"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/59602"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=59586"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=59586"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=59586"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}