{"id":7843,"date":"2011-04-20T23:59:36","date_gmt":"2011-04-20T23:59:36","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=7843"},"modified":"2011-04-23T04:24:50","modified_gmt":"2011-04-23T04:24:50","slug":"possible-development-of-a-subtropical-or-a-tropical-disturbance-in-the-atlantic-ocean","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/7843","title":{"rendered":"Possible development of a subtropical or a tropical disturbance in the Atlantic Ocean?"},"content":{"rendered":"
\"MIMIC<\/a>

MIMIC Total Precipitable Water (TPW) product<\/p><\/div>\n

The National Hurricane Center<\/a><\/strong> initiated Invest 91 to monitor the potential development of a subtropical or even possibly a tropical cyclone over the western Atlantic Ocean on 20 April 2011<\/strong><\/a>. AWIPS images of the MIMIC Total Precipitable Water<\/a><\/strong> (TPW) product (above; click image to play animation)<\/em><\/strong> showed that a tongue of moisture was being advected northward from the band of higher moisture along the Inter-Tropical Convergence Zone (ITCZ) — and this moisture plume was being wrapped into the circulation of the developing disturbance.<\/p>\n

A closer look at the MIMIC TPW product at 14:00 UTC along with an overlay of ASCAT scatterometer winds (below)<\/em><\/strong> revealed a well-defined cyclonic circulation at the surface, with gale force winds within the northwest quadrant of the storm.<\/p>\n

\"MIMIC<\/a>

MIMIC TPW product + ASCAT surface winds + Surface analysis<\/p><\/div>\n

===== 22 APRIL UPDATE =====<\/strong><\/center><\/p>\n
\"GOES-13<\/a>

GOES-13 0.63 \u00c2\u00b5m visible channel images<\/p><\/div>\n

Animations of GOES-13 0.63 \u00c2\u00b5m visible channel images (above)<\/em><\/strong> and GOES-13 10.7 \u00c2\u00b5m IR channel images (below)<\/em><\/strong> from the CIMSS Tropical Cyclones<\/a><\/strong> site continued to show very well-defined cyclonic circulations associated with the feature on 22 April 2011<\/strong>.<\/p>\n

\"GOES-13<\/a>

GOES-13 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

GOES-13 6.5 \u00c2\u00b5m water vapor channel images (below)<\/em><\/strong> indicated that dry mid-tropospheric air was wrapping into the system from the south and east.<\/p>\n

\"GOES-13<\/a>

GOES-13 6.5 \u00c2\u00b5m water vapor channel images<\/p><\/div>\n

A comparison of AWIPS images of the POES AVHRR 0.86 \u00c2\u00b5m visible channel with ASCAT scatterometer surface wind data (below)<\/em><\/strong> revealed the development of deep convective elements just to the north of the low-level circulation center. <\/p>\n

\"POES<\/a>

POES AVHRR 0.86 \u00c2\u00b5m visible image + ASCAT scatterometer surface winds<\/p><\/div>\n

A sequence of three POES AVHRR 0.86 \u00c2\u00b5m visible channel images (below)<\/em><\/strong> showed the evolution of the convective elements associated with the disturbance during the day.<\/p>\n

\"POES<\/a>

POES AVHRR 0.66 \u00c2\u00b5m visible channel images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

The National Hurricane Center initiated Invest 91 to monitor the potential development of a subtropical or even possibly a tropical cyclone over the western Atlantic Ocean on 20 April 2011. AWIPS images of the MIMIC Total Precipitable Water (TPW) product (above; click image to play animation) showed that a tongue of moisture was being advected […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[22,11,8,25,3,31,2],"tags":[],"class_list":["post-7843","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-13","category-marine-weather","category-satellite-winds","category-severe-convection","category-synthetic-satellite-imagery","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7843","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=7843"}],"version-history":[{"count":15,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7843\/revisions"}],"predecessor-version":[{"id":7874,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7843\/revisions\/7874"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=7843"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=7843"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=7843"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}