{"id":5952,"date":"2010-06-30T05:00:02","date_gmt":"2010-06-30T05:00:02","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=5952"},"modified":"2010-07-07T18:34:39","modified_gmt":"2010-07-07T18:34:39","slug":"hurricane-alex","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/5952","title":{"rendered":"Hurricane Alex"},"content":{"rendered":"
\"GOES-13<\/a>

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

GOES-13 10.7 \u00c2\u00b5m IR imagery from the CIMSS Tropical Cyclones<\/a><\/strong> site (above)<\/em><\/strong> showed the development of large convective bursts around the center of Hurricane Alex<\/a><\/strong> during the 29 June<\/a> – 30 June 2010<\/a><\/strong> period. Alex became the first June hurricane in the Atlantic Basin since the 1995 tropical cyclone season<\/a><\/strong> (which produced Hurricane Allison).<\/p>\n

An AWIPS image of POES AVHRR 11.0 \u00c2\u00b5m IR channel data (below)<\/em><\/strong> showed very cold IR brightness temperatures of -80 to -90\u00c2\u00ba C (violet color enhancement)<\/em> associated with the convective bursts as well as the distant bands of intense convection surrounding the hurricane.<\/p>\n

\"POES<\/a>

POES AVHRR 10.8 \u00c2\u00b5m IR image<\/p><\/div>\n

Deep layer wind shear (below)<\/em><\/strong> over the western Gulf of Mexico remained very light, which was favorable factor for further intensification prior to making landfall.<\/p>\n

\"GOES-13<\/a>

GOES-13 IR image + deep layer wind shear<\/p><\/div>\n

DMSP SSMI\/S 85 GHz microwave imagery (below)<\/em><\/strong> showed the possible development of some inner banding structure, as well as the larger and more intense bands of convection far from the center of Alex.<\/p>\n

\"SSMI\/S<\/a>

SSMI\/S microwave image<\/p><\/div>\n

AWIPS images of the MIMIC Total Precipitable Water<\/a><\/strong> product (below)<\/em><\/strong> indicated that a rich source of moisture remained in place across the entire Gulf of Mexico region (with TPW values in excess of 60 mm)<\/em>.<\/p>\n

\"MIMIC<\/a>

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

UPDATE:<\/strong> AWIPS images of the MODIS 0.65 \u00c2\u00b5m visible and 11.0 \u00c2\u00b5m IR channel data with an overlay of ASCAT scatterometer surface winds (below)<\/strong><\/em> depicted the eye of Hurricane Alex at 16:58 UTC on 30 June.<\/p>\n

\"MODIS<\/a>

MODIS 0.655 \u00c2\u00b5m visible and 11.0 \u00c2\u00b5m IR images + ASCAT scatterometer winds<\/p><\/div>\n

===========================================<\/strong><\/p>\n

\"POES<\/a>

POES AVHRR Cloud Top Temperature, Cloud Top Height, and Cloud Type products<\/p><\/div>\n

Later in the day, AWIPS images of the POES AVHRR Cloud Top Temperature (CTT), Cloud Top Height (CTH), and Cloud Type products at 22:05 UTC (above)<\/strong><\/em> displayed a large area of CTT values in the -80 to -83\u00c2\u00ba C<\/strong> range (violet color enhancement), <\/em>with CTH values as high as 17 km<\/strong> (darker blue color enhancement)<\/em>. The Cloud Type product categorized a large portion of the coldest\/highest cloud tops surrounding the eye as “overshooting<\/strong>” (lighter violet color enhancement)<\/em>, in general agreement the the GOES InfraRed\/Water Vapor difference<\/strong><\/a> overshooting top detection technique of Olander and Velden (2009)<\/strong><\/a>. <\/strong><\/p>\n


\n<\/strong><\/p>\n

\"GOES-15<\/a>

GOES-15 and GOES-13 0.63 \u00c2\u00b5m visible channel images<\/p><\/div>\n

The eye of Hurricane Alex became more well-defined on GOES visible imagery as it approached the coast of Mexico, as seen on a comparison of GOES-15 and GOES-13 visible images at 15 minute intervals (above)<\/strong><\/em> and also on GOES-13 Rapid Scan Operations (RSO) images at 5-10 minute intervals (below)<\/strong><\/em>. An impressive convective burst was evident just as the eye was nearing the coastline — in fact, Alex rapidly intensified into a 90 knot Category 2 hurricane just prior to making landfall, as can be seen on this plot of the CIMSS Automated Dvorak Technique<\/a><\/strong>. This made Alex the first Category 2 or stronger hurricane to occur in the month of June since Hurricane Alma back in 1966.<\/p>\n

\"GOES-13<\/a>

GOES-13 0.63 \u00c2\u00b5m visible channel images (Rapid Scan Operations)<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"

GOES-13 10.7 \u00c2\u00b5m IR imagery from the CIMSS Tropical Cyclones site (above) showed the development of large convective bursts around the center of Hurricane Alex during the 29 June – 30 June 2010 period. Alex became the first June hurricane in the Atlantic Basin since the 1995 tropical cyclone season (which produced Hurricane Allison). An […]<\/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":[22,11,43,26,25,3,31,2],"tags":[],"class_list":["post-5952","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-13","category-goes-15","category-poes","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\/5952","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=5952"}],"version-history":[{"count":26,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/5952\/revisions"}],"predecessor-version":[{"id":5988,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/5952\/revisions\/5988"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=5952"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=5952"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=5952"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}