{"id":71929,"date":"2026-08-20T23:59:00","date_gmt":"2026-08-20T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=71929"},"modified":"2026-08-24T03:23:58","modified_gmt":"2026-08-24T03:23:58","slug":"thunderstorms-produce-flash-flooding-and-severe-weather-tornadoes-and-damaging-winds-across-the-northeast-us","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/71929","title":{"rendered":"Thunderstorms produce flash flooding and severe weather (tornadoes and damaging winds) across the Northeast US"},"content":{"rendered":"\n<figure class=\"wp-block-video\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/260820_g19_ir_1hourPrecip.mov\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Infrared Window images with plots of Flash Flood Warning polygons (red) and 1-hour precipitation accumulations at METAR sites (white), from 1901 UTC on 20 August to 0200 UTC on 21 August<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">1-minute Mesoscale Domain Sector GOES-19 <em>(GOES-East)<\/em> Infrared Window images <strong><em>(above)<\/em><\/strong> included Flash Flood Warning polygons and 1-hour precipitation accumulations during a period when thunderstorms produced heavy rainfall and flash flooding across parts of the Northeast US on <strong><a href=\"https:\/\/www.wpc.ncep.noaa.gov\/dailywxmap\/index_20260820.html\">20 August 2026<\/a><\/strong>. Notable rainfall occurred in the New York City area, with <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/260821_kokx_pns_rainfall.text\">over 5 inches<\/a><\/strong> recorded in Suffolk County on Long Island; the highest 1-hour precipitation accumulation at nearby La Guardia International Airport was <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/260820_2310utc_g19_ir_1hourPrecip_klga.png\">1.82 inches<\/a><\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/G19_VIS_NEUS_SVR_20AUG2026_loop_GOES-19_2026232_183825_2026232_231825.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Visible images with time-matched plots of SPC Storm Reports, from 1838-2318 UTC on 20 August<\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Some of these thunderstorms also produced tornadoes and damaging winds &#8212; 1-minute GOES-19 Visible images <strong><em>(above)<\/em><\/strong> and Infrared Window images <strong><em>(below)<\/em><\/strong> included time-matched plots of <strong><a href=\"https:\/\/www.spc.noaa.gov\/climo\/reports\/260820_rpts.html\">SPC Storm Reports<\/a><\/strong>.<\/p>\n\n\n\n<figure class=\"wp-block-video aligncenter\"><video autoplay controls loop muted src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/G19_IR_NEUS_SVR_20AUG2026_loop_GOES-19_2026232_183825_2026232_231825.mp4\" playsinline><\/video><figcaption class=\"wp-element-caption\"><em>1-minute GOES-19 Infrared Window images with time-matched plots of SPC Storm Reports, from 1838-2318 UTC on 20 August <\/em><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The thunderstorm that produced a tornado in Dover, Delaware exhibited a well-defined Enhanced-V storm top signature <strong><em>(below)<\/em><\/strong>.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/G19_IR_NEUS_SVR_20AUG2026_B13_2026232_221825_GOES-19_0001PANEL_FRAME00221.GIF\"><img decoding=\"async\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2026\/08\/G19_IR_NEUS_SVR_20AUG2026_B13_2026232_221825_GOES-19_0001PANEL_FRAME00221.GIF\" alt=\"\"\/><\/a><figcaption class=\"wp-element-caption\"><em>GOES-19 Infrared Window image at 2218 UTC on 20 August with time-matched plots of SPC Storm Reports [click to enlarge]<\/em><\/figcaption><\/figure>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>1-minute Mesoscale Domain Sector GOES-19 (GOES-East) Infrared Window images (above) included Flash Flood Warning polygons and 1-hour precipitation accumulations during a period when thunderstorms produced heavy rainfall and flash flooding across parts of the Northeast US on 20 August 2026. Notable rainfall occurred in the New York City area, with over 5 inches recorded in [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":71965,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[159,16,3],"tags":[],"class_list":["post-71929","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-19","category-heavy-rain-flooding","category-severe-convection"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71929","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=71929"}],"version-history":[{"count":10,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71929\/revisions"}],"predecessor-version":[{"id":71968,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/71929\/revisions\/71968"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/71965"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=71929"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=71929"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=71929"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}