{"id":488,"date":"2007-08-20T20:25:34","date_gmt":"2007-08-20T20:25:34","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/2007\/08\/20\/hurricane-dean-in-the-western-caribbean\/"},"modified":"2007-08-21T04:25:19","modified_gmt":"2007-08-21T04:25:19","slug":"hurricane-dean-in-the-western-caribbean","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/488","title":{"rendered":"Hurricane Dean in the western Caribbean"},"content":{"rendered":"

\"AWIPS<\/a><\/p>\n

AWIPS images of the DMSP and POES AMSU rainfall rates along with the GOES-12 IR channel imagery (above)<\/strong><\/em> shows Hurricane Dean<\/strong><\/a> as a Category 4 storm in the western Caribbean during the morning on 20 August 2007<\/strong>. Satellite-based rainfall rates within the spiral bands of the hurricane were as high as 35 mm per hour (1.4 inches per hour), and GOES-12 IR brightness temperatures around that time were as cold as -77\u00c2\u00ba C (-107\u00c2\u00baF). Dean continued moving westward across the Caribbean, steered by easterly winds along the southern periphery of a deep layer ridge<\/strong><\/a> that was centered over the southeastern US. Refer to the CIMSS Tropical Cyclones<\/strong><\/a> site for the latest information on Hurricane Dean.<\/p>\n

\"GOES-12<\/a><\/p>\n

An animation of GOES-12 visible images (above; Java animation<\/a>)<\/strong><\/em> shows the eye of Dean. When viewed using the normal operational GOES image interval of 15 minutes, the low cloud features within the eye appear to be rotating anticyclonically (clockwise)<\/em>. This is an optical illusion, similar to the “strobe effect”: the low clouds in the eye are moving so quickly that their true motion can only be determined by viewing images more frequently than once every 15 minutes.<\/p>\n

Fortunately, GOES-12 was placed into Rapid Scan Operations (RSO) mode beginning at 18:55 UTC, so images after that time were available at 5 to 10 minute intervals. The GOES-12 RSO visible image animation (below; Java animation<\/a>)<\/strong><\/em> shows the low cloud features within the eye rotating in the “correct” direction (cyclonically, or counterclockwise)<\/em>.<\/p>\n

\"GOES-12<\/a><\/p>\n

A visible image from NOAA-18 (below)<\/strong><\/em> provides a closer view of the mesovortex cloud features within the eye of Dean. Use this Java image fader applet<\/strong><\/a> to fade between the NOAA-18 visible image and the corresponding NOAA-18 IR image.
\n\"NOAA-18<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

AWIPS images of the DMSP and POES AMSU rainfall rates along with the GOES-12 IR channel imagery (above) shows Hurricane Dean as a Category 4 storm in the western Caribbean during the morning on 20 August 2007. Satellite-based rainfall rates within the spiral bands of the hurricane were as high as 35 mm per hour […]<\/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":[22,19,26,2],"tags":[],"class_list":["post-488","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-12","category-poes","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/488","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=488"}],"version-history":[{"count":0,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/488\/revisions"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=488"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=488"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=488"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}