{"id":14311,"date":"2013-11-07T21:40:07","date_gmt":"2013-11-07T21:40:07","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=14311"},"modified":"2015-01-02T15:15:15","modified_gmt":"2015-01-02T15:15:15","slug":"super-typhoon-haiyan-2","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/14311","title":{"rendered":"Super Typhoon Haiyan"},"content":{"rendered":"
\"COMS-1<\/a>

COMS-1 10.8 \u00b5m IR channel images (click to play animation)<\/p><\/div>\n

Super Typhoon Haiyan (31W) formed as a tropical depression at low latitudes in the West Pacific Ocean on 03 November 2013 — and by 18 UTC on 07 November was estimated to have peaked at an intensity of sustained 170 knot winds with gusts to 205 knots (Storm track map<\/strong><\/a> | ADT plot<\/strong><\/a> | JTWC warning text<\/strong><\/a>). McIDAS images of 15-minute interval 10.8 \u00b5m IR channel data from the Korean COMS-1<\/strong><\/a> satellite (above; click image to play animation; <\/strong>a YouTube video<\/a> <\/strong>is also available)<\/strong><\/em> showed the intense tropical cyclone as it moved westward and made landfall in the Philippines on 07 November. There was a large, nearly symmetric ring of very cold cloud-top IR brightness temperatures in the -80 to -90\u00ba C range (violet colors) <\/em>— and at times there were a few isolated pixels colder than -90\u00ba C (yellow enhancement)<\/em>. For comparison, a YouTube video of<\/strong> MTSAT-1<\/a><\/strong> 10.8 \u00b5m IR imagery is also available.<\/p>\n

As the eye was still east of the Philippines, a McIDAS-V image comparison of 375-m resolution Suomi NPP VIIRS 0.7 \u00b5m Day\/Night Band (DNB) and 11.45 \u00b5m IR channel data at 16:15 UTC on 07 November (below<\/strong>; courtesy of William Straka, CIMSS)<\/em> revealed intricate banding structures within the eyewall region on the IR image, as well as bright streaks on the DNB image due to cloud illumination by intense lightning activity.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.7 \u00b5m Day\/Night Band and 11.45 \u00b5m IR channel images<\/p><\/div>\n

The eye and eyewall of Haiyan moved over the eastern Philippine islands of Samar and Leyte (near the city of Tacloban<\/strong><\/a>) during the early morning hours, as can be seen in COMS-1 0.675 \u00b5m visible channel images (below; click image to play animation; a YouTube video<\/a><\/strong> is also available)
\n<\/em><\/p>\n

\"COMS-1<\/a>

COMS-1 0.675 \u00b5m visible channel images (click to play animation)<\/p><\/div>\n

 <\/p>\n

\"DMSP<\/a>

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

The nearly annular structure of the eyewall at 21:08 UTC on 07 November was revealed on a DMSP SSMIS 85 GHz microwave image (above)<\/strong><\/em> from the CIMSS Tropical Cyclones<\/strong><\/a> site. In addition, a sequence of eyewall replacement cycles can be seen during the 06-07 November period using the MIMIC-TC<\/strong><\/a> product (below)<\/strong><\/em>. It appears as though Super Typhoon Haiyan was in the process of undergoing another eyewall replacement cycle as it was making landfall in the Philippines.<\/p>\n

\"MIMIC-TC<\/a>

MIMIC-TC morphed microwave imagery (click image to play animation)<\/p><\/div>\n

Regarding the size of and very cold cloud-top IR brightness temperatures seen with Super Typhoon Haiyan, the IR images below (courtesy of Rick Kohrs, SSEC)<\/em> show a side-by-side comparison with Category 5 Hurricane Katrina (Haiyan has been artifically superimposed at the same location over the Gulf of Mexico).<\/em> Note the significantly colder cloud-top IR brightness temperatures associated with Haiyan (-80 to -89 C, violet colors),<\/em> due to its location in the tropics (near 10 N latitude)<\/em> where the tropopause was much higher and much colder.<\/p>\n

\"IR<\/a>

IR image comparison of Haiyan (left) and Katrina (right)<\/p><\/div>\n

It is interesting to note that during the previous daytime hours (on 06 November),<\/em> a series of mesovortices could be seen within the eye of Haiyan on COMS-1 visible images (below; click image to play animation; a YouTube video<\/a><\/strong> is also available)<\/strong>.<\/em> For more discussion on these mesovortices, see the From the Lee Side<\/strong><\/a> blog.
\n<\/em><\/p>\n

\"COMS-1<\/a>

COMS-1 0.675 \u00b5m visible channel images (click to play animation)<\/p><\/div>\n

 <\/p>\n

\"Sea<\/a>

Sea Surface Temperature analysis (with track of Haiyan)<\/p><\/div>\n

As pointed out in the Joint Typhoon Warning Center prognostic reasoning bulletin<\/strong><\/a>, factors that favored the intensification of Super Typhoon Haiyan included warm sea surface temperatures (above)<\/strong><\/em> and low values of deep layer wind shear (below)<\/strong><\/em>.<\/p>\n

\"MTSAT<\/a>

MTSAT IR images with overlay of Deep Layer Wind Shear contours<\/p><\/div>\n

11 November Update<\/strong>: A McIDAS-V image comparison of\u00c2\u00a0 “before Haiyan” (31 October) and “after Haiyan” (09 November) night-time Suomi NPP VIIRS 0.7 \u00c2\u00b5m Day\/Night Band data (below<\/strong>; courtesy of William Straka, SSEC\/CIMSS)<\/em> showed the extent of the power outages in the Tacloban City area and other towns in the northern portion of Leyte<\/strong><\/a> province, caused by devastating damage sustained during the landfall of the powerful typhoon.<\/p>\n

\"Suomi\/NPP<\/a>

Suomi\/NPP Day\/Night Band Imagery before and after Haiyan<\/p><\/div>\n

21 November update:<\/strong> Rick Kohrs (SSEC) created a large (72 megabyte) animation of hourly MTSAT-1 6.75 \u00c2\u00b5m water vapor channel imagery — covering the life span of Haiyan during the 03-11 November period — superimposed on a Sea Surface Temperature background (below; click image to play animation;<\/strong> a YouTube video<\/a> <\/strong>is also available)<\/strong><\/em>.<\/p>\n

\"MTSAT-1<\/a>

MTSAT-1 6.75 \u00c2\u00b5m water vapor images, superimposed on a Sea Surface Temperature background (click to play animation)<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Super Typhoon Haiyan (31W) formed as a tropical depression at low latitudes in the West Pacific Ocean on 03 November 2013 — and by 18 UTC on 07 November was estimated to have peaked at an intensity of sustained 170 knot winds with gusts to 205 knots (Storm track map | ADT plot | JTWC […]<\/p>\n","protected":false},"author":18,"featured_media":14313,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[57,56,51,20,49,2,48],"tags":[],"class_list":["post-14311","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-coms","category-dmsp","category-mcidas-v","category-mtsat","category-suomi_npp","category-tropical-cyclones","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14311","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=14311"}],"version-history":[{"count":69,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14311\/revisions"}],"predecessor-version":[{"id":17486,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/14311\/revisions\/17486"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/14313"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=14311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=14311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=14311"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}