{"id":31228,"date":"2018-12-29T15:59:19","date_gmt":"2018-12-29T15:59:19","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=31228"},"modified":"2018-12-30T04:33:33","modified_gmt":"2018-12-30T04:33:33","slug":"hurricane-force-low-over-the-aleutian-islands","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/31228","title":{"rendered":"Hurricane-Force low over the Aleutian Islands"},"content":{"rendered":"
\"Water<\/a>

Water Vapor images from GOES-17 (6.9 \u00b5m, left)<\/em> and GOES-15 (6.5 \u00b5m, right)<\/em> [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>\n

* GOES-17 images shown here are preliminary and non-operational *<\/em><\/p>\n

A mid-latitude cyclone moved northward over the far western Aleutian Islands late in the day on 28 December 2018, intensifying to a Hurricane Force low pressure system by 06 UTC on 29 December (surface analyses<\/strong><\/a>). A comparison of GOES-17 and GOES-15 (GOES-West)<\/em> Water Vapor images (above)<\/strong><\/em> highlighted the improved spatial resolution of the GOES-17 data (2 km at satellite sub-point, vs 4 km for GOES-15). The view from GOES-15 was more oblique, since it was positioned at 128\u00ba W longitude (compared to 137.2\u00ba W longitude for GOES-17). GOES-17 is scheduled to become the operational GOES-West satellite in January 2019.<\/p>\n

A toggle between GOES-17 Low-level (7.3 \u00b5m<\/strong><\/a>), Mid-level (6.9 \u00b5m<\/strong><\/a>) and Upper-level (6.2 \u00b5m<\/strong><\/a>) Water Vapor images at 1100 UTC is shown below. Although the satellite viewing angle was large, good detail could still be seen.<\/p>\n

\"GOES-17<\/a>

GOES-17 Low-level (7.3 \u00b5m),<\/em> Mid-level (6.9 \u00b5m)<\/em> and Upper-level (6.2 \u00b5m)<\/em> Water Vapor images at 1100 UTC [click to enlarge]<\/p><\/div>A sequence of Suomi NPP VIIRS Visible (0.64 \u00b5m), Day\/Night Band (0.7 \u00b5m) and Infrared Window (11.45 \u00b5m) images (below)<\/strong><\/em> showed the storm as it was intensifying — the peak surface wind gust at Shemya\u00a0Eareckson Air Station (PASY) was 66 knots at 1024 UTC<\/strong><\/a>. Since the Moon was in the Waning Gibbous phase (at 60% of Full),<\/em> there was ample illumination to provide a useful “visible image at night” with the VIIRS Day\/Night Band at 1403 UTC<\/strong><\/a> (4:03 AM local time).<\/p>\n

\"Suomi<\/a>

Suomi NPP VIIRS Visible (0.64 \u00b5m),<\/em> Day\/Night Band (0.7 \u00b5m)<\/em> and Infrared Window (11.45 \u00b5m)<\/em> images [click to enlarge]<\/p><\/div>A time series plot of hourly surface weather data from Shemya during the time period of the GOES-17\/15 Water Vapor image comparison is shown below, along with a more detailed time series that included Special Reports in addition to the standard Hourly Reports..<\/p>\n

\"Time<\/a>

Time series plot of Hourly surface weather data from Shemya Eareckson Air Station [click to enlarge]<\/p><\/div>

\"Time<\/a>

Time series plot of Hourly and Special surface weather data from Shemya Eareckson Air Station [click to enlarge]<\/p><\/div><\/p>\n","protected":false},"excerpt":{"rendered":"

* GOES-17 images shown here are preliminary and non-operational * A mid-latitude cyclone moved northward over the far western Aleutian Islands late in the day on 28 December 2018, intensifying to a Hurricane Force low pressure system by 06 UTC on 29 December (surface analyses). A comparison of GOES-17 and GOES-15 (GOES-West) Water Vapor images […]<\/p>\n","protected":false},"author":18,"featured_media":31230,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[43,80,49,48],"tags":[],"class_list":["post-31228","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-15","category-goes-17","category-suomi_npp","category-viirs"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31228","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=31228"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31228\/revisions"}],"predecessor-version":[{"id":31235,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/31228\/revisions\/31235"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/31230"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=31228"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=31228"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=31228"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}