{"id":47914,"date":"2022-09-16T23:59:00","date_gmt":"2022-09-16T23:59:00","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=47914"},"modified":"2022-12-09T16:29:51","modified_gmt":"2022-12-09T16:29:51","slug":"ex-typhoon-merbok-enters-the-bering-sea","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/47914","title":{"rendered":"Ex-typhoon Merbok enters the Bering Sea"},"content":{"rendered":"<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_goes17_airMassRGB_exMerbok_Bering_Sea_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/ak_rgb_metar-20220916_170031.png\" width=\"640\" height=\"310\"><\/a><p class=\"wp-caption-text\">GOES-17 Air Mass RGB images, with hourly plots of surface reports [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_goes17_airMassRGB_exMerbok_Bering_Sea_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>\n<p>GOES-17 <em>(GOES-West)<\/em> <a href=\"https:\/\/rammb.cira.colostate.edu\/training\/visit\/quick_guides\/QuickGuide_GOESR_AirMassRGB_final.pdf\"><strong>Air Mass RGB<\/strong><\/a> images with hourly plots of surface reports <em><strong>(above)<\/strong><\/em> showed the remnants of ex-Typhoon Merbok (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220915_00utc_Merbok_track.gif\"><strong>storm track<\/strong><\/a>) moving northward across the Bering Sea (<a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_220917_surface_analyses_anim.gif\"><strong>surface analyses<\/strong><\/a>) on 16 September 2022. This strong extratropical cyclone had an <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_220917_meanSeaLevelPressureAnomaly_anim.gif\"><strong>anomalously-low surface pressure<\/strong><\/a> as it moved northward &#8212; in fact, its central Mean Sea Level Pressure set a record for the month of September in the Bering Sea:<\/p>\n\n\n<figure class=\"wp-block-embed is-type-rich is-provider-twitter wp-block-embed-twitter\"><div class=\"wp-block-embed__wrapper\">\n<blockquote class=\"twitter-tweet\" data-width=\"500\" data-dnt=\"true\"><p lang=\"en\" dir=\"ltr\">The storm affecting western Alaska today had easily the lowest MSLP (1950-present) for September in the northern Bering Sea, and based on ECMWF analyses it even beat winter\/all-time records along part of its track. (To be confirmed when ERA5 data is in)  <a href=\"https:\/\/twitter.com\/alaskawx?ref_src=twsrc%5Etfw\">@AlaskaWx<\/a> <a href=\"https:\/\/twitter.com\/NWSFairbanks?ref_src=twsrc%5Etfw\">@NWSFairbanks<\/a> <a href=\"https:\/\/t.co\/2Nq859HxIy\">pic.twitter.com\/2Nq859HxIy<\/a><\/p>&mdash; World Climate Service (@WorldClimateSvc) <a href=\"https:\/\/twitter.com\/WorldClimateSvc\/status\/1571303715683897344?ref_src=twsrc%5Etfw\">September 18, 2022<\/a><\/blockquote><script async src=\"https:\/\/platform.twitter.com\/widgets.js\" charset=\"utf-8\"><\/script>\n<\/div><\/figure>\n\n\n<p>The storm center passed just northwest of <a href=\"https:\/\/www.ndbc.noaa.gov\/station_page.php?station=46035\"><strong>Buoy 46035<\/strong><\/a>, where the <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_buoy46035_wind_gusts.png\"><strong>peak wind gust<\/strong><\/a> was 68 knots (78 mph) at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/ak_rgb_metar-20220916_180031.png\"><strong>1800 UTC<\/strong><\/a> and <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/ak_rgb_metar-20220916_190031.png\"><strong>1900 UTC<\/strong><\/a> on 16 September. These strong winds caused <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_buoy46035_waveHeight.png\"><strong>wave h<\/strong><\/a><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_buoy46045_waveHeight.png\"><strong>eights<\/strong><\/a> to 52 feet, which resulted in a notable <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_buoy46035_water_temperature.png\"><strong>upwelling of cooler water<\/strong><\/a>. Such strong southwesterly surface winds in the vicinity of Buoy 46035 occurred beneath a swath of <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_220917_925hPaWindSpeedAnomaly_anim.gif\"><strong>anomalously-strong 925 hPa winds<\/strong><\/a> within the southeast quadrant of the storm. Two particularly adverse impacts of these strong winds were coastal erosion and flooding across much of western Alaska (more of the storm&#8217;s impacts are discussed <a href=\"https:\/\/alaskabeacon.com\/2022\/09\/19\/typhoon-merbok-was-fueled-by-an-unusually-warm-pacific-ocean\/\"><strong>here<\/strong><\/a>).<\/p>\n<p>In the Air Mass RGB images, deeper shades of red-to-orange in the vicinity of the storm center vhighlighted areas where there was enhanced ozone within the atmospheric column (due to an anomalously-low tropopause ) &#8212; overlays of AK-NAM40 model Potential Vorticity (PV) 1.5 pressure <em><strong>(below)<\/strong><\/em> indicated that the &#8220;dynamic tropopause&#8221; near the storm center may have descended as low as the 900 Pa pressure level.<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_goes17_airMassRGB_akNAM40_pv1.5pressure_exMerbok_Bering_Sea_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/ak_pv-20220916_170031.png\" width=\"640\" height=\"310\"><\/a><p class=\"wp-caption-text\">GOES-17 Air Mass RGB images, with overlays of AK-NAM40 model PV1.5 pressure [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_goes17_airMassRGB_akNAM40_pv1.5pressure_exMerbok_Bering_Sea_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>\n<p>In a larger-scale view of GOES-17 Air Mass RGB images created using <a href=\"https:\/\/www.ssec.wisc.edu\/software\/geo2grid\/\"><strong>Geo2Grid<\/strong><\/a> <em><strong>(below)<\/strong><\/em>, one interesting feature was a distinct plume of moist tropical air (highlighted by darker shades of green) that moved northward across the Aleutian Islands into the Bering Sea (for example, at <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/GOES-17_ABI_RadF_airmass_2022259_060028Z.png\"><strong>0600 UTC<\/strong><\/a> on 16 September in the <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220916_06z_sfc.png\"><strong>warm sector<\/strong><\/a> of the storm).<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220915_220917_goes17_airMassRGB_Bering_Sea_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/GOES-17_ABI_RadF_airmass_2022259_060028Z.png\" width=\"640\" height=\"570\"><\/a><p class=\"wp-caption-text\">GOES-17 Air Mass RGB images [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220915_220917_goes17_airMassRGB_Bering_Sea_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>\n<p>The <a href=\"https:\/\/tropic.ssec.wisc.edu\/real-time\/mtpw2\/product.php?color_type=tpw_nrl_colors&amp;prod=alaska&amp;timespan=48hrs&amp;anim=html5\"><strong>MIMIC Total Precipitable Water<\/strong><\/a> product <em><strong>(below)<\/strong><\/em> showed the north-northeastward transport of tropical moisture as Typhoon Merbok transitioned to an extratropical storm.<\/p>\n<div style=\"width: 650px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220914_220917_mimicTPW_anim.gif\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/comp20220916.060000_tpw.png\" width=\"640\" height=\"320\"><\/a><p class=\"wp-caption-text\">MIMIC Total Precipitable Water product [click to play animated GIF | <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2022\/09\/220914_220917_mimicTPW_anim.mp4\"><strong>MP4<\/strong><\/a>]<\/p><\/div>\n<p>Additional information pertaining to this event is available <a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/47922\"><strong>here<\/strong><\/a>.&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>GOES-17 (GOES-West) Air Mass RGB images with hourly plots of surface reports (above) showed the remnants of ex-Typhoon Merbok (storm track) moving northward across the Bering Sea (surface analyses) on 16 September 2022. This strong extratropical cyclone had an anomalously-low surface pressure as it moved northward &#8212; in fact, its central Mean Sea Level Pressure [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":47950,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[132,80,79,45],"tags":[],"class_list":["post-47914","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-geo2grid","category-goes-17","category-microwave","category-redgreenblue-rgb-images"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47914","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=47914"}],"version-history":[{"count":24,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47914\/revisions"}],"predecessor-version":[{"id":49088,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/47914\/revisions\/49088"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/47950"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=47914"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=47914"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=47914"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}