{"id":11549,"date":"2012-10-10T21:38:06","date_gmt":"2012-10-10T21:38:06","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=11549"},"modified":"2012-10-13T00:59:13","modified_gmt":"2012-10-13T00:59:13","slug":"convective-bursts-associated-with-invest-97l","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/11549","title":{"rendered":"Convective bursts associated with Invest 97L (Tropical Storm Patty)"},"content":{"rendered":"
\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m and GOES-14 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

A night-time (just after 07 UTC)<\/em> comparison of AWIPS images of 375-meter resolution (mapped onto a 1-km AWIPS grid)<\/em> Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR and 4-km resolution GOES-14 10.7 \u00c2\u00b5m IR channel data (above)<\/strong> showed deep convection associated with tropical cyclone Invest 97L located to the east of the Bahamas on 10 October 2012<\/a><\/strong>. Cloud top IR brightness temperatures were as cold as -87 C on the VIIRS images, compared to -80 C on the GOES image. Also note the parallax shift<\/strong><\/a> on the GOES image, with features appearing to be located farther to the north and west due to the geostationary satellite viewing angle.<\/p>\n

About 90 minutes later, a similar comparison of 1-km resolution POES AVHRR 12.0 \u00c2\u00b5m IR and 4-km resolution GOES-14 10.7 \u00c2\u00b5m IR channel data (below)<\/strong><\/em> again showed a significant difference in the coldest cloud top IR brightness temperatures seen (-89 C on AVHRR vs -79 C on GOES)<\/em>. Note the appearance of cloud-top gravity waves propagating along the southeastern quadrant of the convective cluster on the VIIRS and AVHRR IR images.<\/p>\n

\"POES<\/a>

POES AVHRR 12.0 \u00c2\u00b5m IR and GOES-14 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

During the afternoon hours, a comparison of 1-km resolution MODIS 12.0 \u00c2\u00b5m IR and 4-km resolution GOES-14 10.7 \u00c2\u00b5m IR data (below)<\/strong><\/em> showed an even larger difference between the coldest cloud top IR brightness temperatures (-92 C on MODIS, -79 C on GOES)<\/em>.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR and GOES-14 10.7 \u00c2\u00b5m IR images<\/p><\/div>\n

An animation of GOES-14 10.7 \u00c2\u00b5m IR channel images with an overlay of ASCAT surface scatterometer winds at 14:12 UTC from the CIMSS Tropical Cyclones<\/strong><\/a> site (below)<\/strong><\/em> suggested that much of these deep convective bursts were occurring to the southeast of the low-level circulation center.<\/p>\n

\"GOES-14<\/a>

GOES-14 10.7 \u00c2\u00b5m IR images with ASCAT surface scatterometer winds<\/p><\/div>\n

===== 11 October Update =====<\/strong><\/p>\n

Invest 97L was classified as Tropical Storm Patty by the National Hurricane Center<\/strong><\/a> on 11 October<\/a><\/strong>. A comparison of Suomi NPP VIIRS 0.64 \u00c2\u00b5 visible channel and 11.45 \u00c2\u00b5m IR channel images (below)<\/strong><\/em> showed that the deep convection persisted, with IR cloud top temperatures as cold as -90\u00c2\u00ba C (violet color enhancement)<\/em>.<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.64 \u00c2\u00b5m visible channel and 11.45 \u00c2\u00b5m IR channel images<\/p><\/div>\n

===== 12 October Update =====<\/strong><\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS 0.8 \u00c2\u00b5m Day\/Night Band, 3.74 \u00c2\u00b5m shortwave IR, and 11.45 \u00c2\u00b5m IR images<\/p><\/div>\n

Due to persistent southwesterly wind shear, the low-level circulation center of Tropical Storm Patty became increasingly decoupled from the deep convection. The night-time circular signature of the low-level circulation center can be seen on 06:25 UTC (2:25 AM local time)<\/em> Suomi NPP VIIRS 0.8 \u00c2\u00b5m Day\/Night Band and 3.74 \u00c2\u00b5m shortwave IR images (above)<\/em><\/strong>. Subsequent daytime GOES-14 visible images on 12 October 2012<\/strong> showed the low-level circulation center became completely exposed (below)<\/strong><\/em>.<\/p>\n

\"GOES-14<\/a>

GOES-14 0.63 \u00c2\u00b5m visible channel images<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A night-time (just after 07 UTC) comparison of AWIPS images of 375-meter resolution (mapped onto a 1-km AWIPS grid) Suomi NPP VIIRS 11.45 \u00c2\u00b5m IR and 4-km resolution GOES-14 10.7 \u00c2\u00b5m IR channel data (above) showed deep convection associated with tropical cyclone Invest 97L located to the east of the Bahamas on 10 October 2012. […]<\/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":[22,40,12,26,25,49,2],"tags":[],"class_list":["post-11549","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-14","category-modis","category-poes","category-satellite-winds","category-suomi_npp","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11549","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=11549"}],"version-history":[{"count":12,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11549\/revisions"}],"predecessor-version":[{"id":11561,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/11549\/revisions\/11561"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=11549"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=11549"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=11549"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}