{"id":8672,"date":"2011-08-22T23:59:05","date_gmt":"2011-08-22T23:59:05","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=8672"},"modified":"2011-08-24T02:50:19","modified_gmt":"2011-08-24T02:50:19","slug":"hurricane-irene","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/8672","title":{"rendered":"Hurricane Irene"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 0.63 \u00c2\u00b5m visible channel images (click image to play animation)<\/p><\/div>\n

On 22 August 2011<\/a><\/strong> Tropical Storm Irene intensified to become the first Atlantic basin hurricane of the 2011 season. McIDAS images of GOES-13 0.63 \u00c2\u00b5m visible channel data (above; click image to play animation)<\/em><\/strong> showed that while no eye was yet apparent, a number of discrete convective bursts could be seen during the day. The GOES-13 satellite had been placed into Rapid Scan Operations (RSO) mode, providing images as frequently as every 5-10 minutes.<\/p>\n

An animation of GOES-13 10.7 \u00c2\u00b5m IR images from the CIMSS Tropical Cyclones<\/a><\/strong> site (below)<\/em><\/strong> showed that large convective bursts continued into the night-time hours, as Hurricane Irene<\/a><\/strong> reached Category 2 intensity.<\/p>\n

\"GOES-13<\/a>

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

The presence of a central dense overcast meant that no eye was apparent on the GOES IR imagery — but a DMSP SSMIS 85 GHz microwave brightness temperature image (below)<\/em><\/strong> showed that an eye was indeed in the process of forming at 00:48 UTC on 23 August.<\/p>\n

\"DMSP<\/a>

DMSP SSMIS 85 GHz microwave brightness temperature image<\/p><\/div>\n

===== 23 August Update =====<\/strong><\/p>\n

\"GOES-13<\/a>

GOES-13 0.63 \u00c2\u00b5m visible images (click image to play animation)<\/p><\/div>\n

On 23 August 2011<\/strong>, some hints of an eye began to appear early in day on GOES-13 0.63 \u00c2\u00b5m visible channel images (above),<\/em><\/strong> but the view of an eye structure became obscured by a series of large convective bursts later in the day. As requested by the National Hurricane Center<\/a><\/strong>, the GOES-13 satellite remained in Rapid Scan Operations (RSO) mode, providing images as frequently as every 5-10 minutes.<\/p>\n

In a comparison of AWIPS images of 1-km resolution POES AVHRR 0.65 \u00c2\u00b5m visible and 10.8 \u00c2\u00b5m IR data (below),<\/em><\/strong> the hints of an eye structure could be more easily seen on the visible image, while widespread “transverse banding” within the upper level cirrus outflow was very evident on the IR image.<\/p>\n

\"POES<\/a>

POES AVHRR 0.65 \u00c2\u00b5m visible and 10.8 \u00c2\u00b5m IR images<\/p><\/div>\n

Later, during the evening hours, the signature of an eye began to appear on GOES-13 10.7 \u00c2\u00b5m IR images from the CIMSS Tropical Cylones<\/a><\/strong> site (below)<\/em><\/strong>.<\/p>\n

\"GOES-13<\/a>

GOES-13 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

On 22 August 2011 Tropical Storm Irene intensified to become the first Atlantic basin hurricane of the 2011 season. McIDAS images of GOES-13 0.63 \u00c2\u00b5m visible channel data (above; click image to play animation) showed that while no eye was yet apparent, a number of discrete convective bursts could be seen during the day. The […]<\/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":[22,11,26,2],"tags":[],"class_list":["post-8672","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-13","category-poes","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/8672","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=8672"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/8672\/revisions"}],"predecessor-version":[{"id":8675,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/8672\/revisions\/8675"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=8672"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=8672"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=8672"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}