{"id":22648,"date":"2016-11-21T17:50:44","date_gmt":"2016-11-21T17:50:44","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=22648"},"modified":"2016-11-23T16:48:46","modified_gmt":"2016-11-23T16:48:46","slug":"late-season-tropical-depression-in-the-southwest-caribbean-sea","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/22648","title":{"rendered":"Late-season Tropical Storm Otto in the southwest Caribbean Sea"},"content":{"rendered":"
\"ascatwinds_1433utc_21nov2016\"<\/a>

Metop-A Scatterometer winds at 1430 UTC and GOES-13 10.7 \u00b5m Brightness Temperature (Click to enlarge)<\/p><\/div>\n

A late-season tropical depression<\/a> has formed in the southwestern Caribbean Sea. The morning Metop-A pass on 21 November 2016 allowed ASCAT scatterometer winds to be sampled over the system: rain-flagged values near tropical storm force were present as shown above. A similar image (from this site<\/a>) is available here<\/a>, and also here<\/a> (from this site<\/a>).<\/p>\n

\"\"<\/a>

GOES-13 Infrared (10.7 \u00b5m) Brightness Temperatures (Click to animate)<\/p><\/div>\n

Infrared (10.7 \u00b5m) imagery from GOES-13, above, from 1315 through 1715 UTC on 21 November, shows periodic deep convection over the Depression; the grey regions in the deepest convection over the system correspond to brightness temperatures colder than -75 C. The environment surrounding this system, shown below, is marginally favorable for strengthening; sea-surface temperatures are warm, although the oceanic heat content suggests the warmth does not extend through a deep column of water. Wind shear over the storm is modest (but far stronger north of the storm). (Imagery below is from this site<\/a>). The system is forecast to become a tropical storm within the next 24 hours.<\/p>\n

\"\"<\/a>

Sea-surface temperatures, Oceanic Heat Content and Wind Shear (Click to enlarge)<\/p><\/div>\n

Update: Otto was named a tropical storm at 2100 UTC<\/a> 21 November; GOES-13 Visible (0.63 \u00b5m) Imagery is shown below. Numerous tropical overshooting tops can be seen during the course of the day.<\/p>\n

<\/a>

GOES-13 Visible (0.63 \u00b5m) Imagery on 21 November 2016 (Click to animate)<\/p><\/div>\n

MIMIC Total Precipitable Water<\/a> fields, below, show that Otto emerged from a region of persistent deep moisture over the southwestern Caribbean Sea that has been contracting as the storm formed. This region of moisture was focused along the intersection of a stalled and decaying Atlantic frontal zone and the Pacific monsoon trough (hourly animation<\/a>).<\/p>\n

\"\"<\/a>

MIMIC Total Precipitable Water fields at 2100 UTC on 17,18,19,20 and 21 November (Click to enlarge)<\/p><\/div>\n

DMSP-16 Microwave (85 GHz) imagery, below, showed evidence of a closed eye associated with Otto at 2132 UTC.<\/p>\n

\"DMSP-16<\/a>

DMSP-16 SSMIS Microwave (85 GHz) image [click to enlarge]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A late-season tropical depression has formed in the southwestern Caribbean Sea. The morning Metop-A pass on 21 November 2016 allowed ASCAT scatterometer winds to be sampled over the system: rain-flagged values near tropical storm force were present as shown above. A similar image (from this site) is available here, and also here (from this site). […]<\/p>\n","protected":false},"author":19,"featured_media":22650,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[56,11,58,25,2],"tags":[],"class_list":["post-22648","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dmsp","category-goes-13","category-metop","category-satellite-winds","category-tropical-cyclones"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/22648","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\/19"}],"replies":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/comments?post=22648"}],"version-history":[{"count":31,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/22648\/revisions"}],"predecessor-version":[{"id":22685,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/22648\/revisions\/22685"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/22650"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=22648"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=22648"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=22648"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}