{"id":54336,"date":"2023-09-06T23:59:00","date_gmt":"2023-09-06T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=54336"},"modified":"2023-09-08T17:38:15","modified_gmt":"2023-09-08T17:38:15","slug":"lee-intensifies-to-a-category-1-hurricane-while-jova-intensifies-to-category-5","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/54336","title":{"rendered":"Lee intensifies to a Category 1 Hurricane, while Jova intensifies to Category 5 (Update: Lee also reaches Category 5)"},"content":{"rendered":"
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GOES-16 \u201cRed\u201d Visible (0.64 \u00b5m, top) and \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom) images, from 1700-2100 UTC [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n

1-minute Mesoscale Domain Sector<\/strong><\/a> GOES-16 (GOES-East)<\/em>\u00a0\u201cRed\u201d Visible (0.64 \u00b5m<\/strong><\/a>) and \u201cClean\u201d Infrared Window (10.3 \u00b5m<\/strong><\/a>) images (above) <\/strong><\/em>showed Lee <\/strong><\/a>as it intensified to become a Category 1 Hurricane in the Central Atlantic Ocean on 06 September 2023. The coldest cloud-top infrared brightness temperatures were around -90C (brighter white pixels embedded within darker black areas).\u00a0<\/p>\n

Lee had been moving across warm water<\/strong><\/a> — and was traversing an environment having low deep-layer wind shear (below)<\/strong><\/em> — factors which were favorable for intensification. Water temperature and wind shear imagery was sourced from the CIMSS Tropical Cyclones<\/strong><\/a> site.<\/p>\n

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GOES-16 Infrared Window images, with contours and streamlines of deep-layer wind shear at 2100 UTC [click to enlarge]<\/p><\/div>\n

Meanwhile, in the East Pacific Hurricane Jova<\/strong><\/a> rapidly intensified to a Category 4 storm by 2100 UTC on 06 September, exhibiting a pinhole eye as seen in GOES-18 (GOES-West)<\/em> Visible and Infrared imagery (below)<\/strong><\/em>.<\/p>\n

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GOES-18 \u201cRed\u201d Visible (0.64 \u00b5m, top) and \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom) images, from 1800-0000 UTC [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n

Similar to Lee, Jova had been moving across warm water<\/strong><\/a> — and was traversing an environment having low deep-layer wind shear (below)<\/strong><\/em> — factors which were favorable for intensification.<\/p>\n

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GOES-18 Infrared Window images, with contours and streamlines of deep-layer wind shear at 2200 UTC [click to enlarge]<\/p><\/div>\n

Jova was later upgraded to\u00a0Category 5<\/strong><\/a> intensity at 0900 UTC (Infrared images: animated GIF<\/strong><\/a>\u00a0|\u00a0MP4<\/strong><\/a>).\u00a0<\/p>\n

===== 07 September Update =====<\/strong><\/p>\n

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GOES-16 Infrared images, from 2100 UTC on 07 September to 0300 UTC on 08 September [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>\n

At 0300 UTC<\/strong><\/a> on 08 September, Hurricane Lee was upgraded to a Category 5 storm (the first Category 5 of the 2023 Atlantic Basin season). 6 hours of 1-minute GOES-16 Infrared images leading up to that time are shown above — and the 0100 UTC Infrared image with an overlay of Metop-C ASCAT surface scatterometer winds is shown below. Note: 25-km resolution ASCAT winds are available in AWIPS, which indicated a maximum speed of 75 knots<\/strong><\/a> — however, the Ultra-High Resolution (UHR) ASCAT wind product at that time (source<\/strong><\/a>) had a maximum speed of 136 knots.<\/p>\n

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GOES-16 Infrared Window image, with an overlay of Metop-C ASCAT surface scatterometer winds [click to enlarge]<\/p><\/div>\n

Even though deep-layer wind shear<\/strong><\/a> was gradually increasing in its vicinity, Lee reached Category 5 intensity as it began to move across water with increasing values of Ocean Heat Content and Sea Surface Temperature (below)<\/strong><\/em>.<\/p>\n

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Ocean Heat Content and Sea Surface Temperature on 07 September, with an overlay of the track of Hurricane Lee [click to enlarge]<\/p><\/div>\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

1-minute Mesoscale Domain Sector GOES-16 (GOES-East)\u00a0\u201cRed\u201d Visible (0.64 \u00b5m) and \u201cClean\u201d Infrared Window (10.3 \u00b5m) images (above) showed Lee as it intensified to become a Category 1 Hurricane in the Central Atlantic Ocean on 06 September 2023. The coldest cloud-top infrared brightness temperatures were around -90C (brighter white pixels embedded within darker black areas).\u00a0 Lee […]<\/p>\n","protected":false},"author":18,"featured_media":54357,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,114,58,25,2],"tags":[],"class_list":["post-54336","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-goes-18","category-metop","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54336","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=54336"}],"version-history":[{"count":26,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54336\/revisions"}],"predecessor-version":[{"id":54388,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/54336\/revisions\/54388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/54357"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=54336"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=54336"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=54336"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}