{"id":39656,"date":"2021-01-14T21:59:53","date_gmt":"2021-01-14T21:59:53","guid":{"rendered":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=39656"},"modified":"2021-01-18T01:33:09","modified_gmt":"2021-01-18T01:33:09","slug":"a-leeside-cold-frontal-gravity-wave-in-the-plains-and-an-anomalous-polar-jet-stream-over-the-rockies","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/39656","title":{"rendered":"A leeside cold frontal gravity wave in the Plains, and a strong polar jet stream over the Rockies"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 Upper-level Water Vapor (6.2 \u00b5m)<\/em> images, with plots of hourly surface wind barbs and gusts [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>GOES-16\u00a0(GOES-East)<\/em>\u00a0Upper-level Water Vapor (6.2\u00a0\u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> displayed the signature of a leeside cold frontal gravity wave (reference<\/strong><\/a>) as it moved rapidly southward across the Plains (surface analyses<\/strong><\/a>) on 14 January 2021<\/strong><\/a>. Post-frontal wind gusts in the 50-70 knot range were seen, with a peak gust to 91 knots (105 mph) in eastern Wyoming.<\/p>\n

In addition, an anomalously-strong<\/strong><\/a> (170-180 knot) meridional branch of the upper-tropospheric polar jet stream was progressing southward over the Rocky Mountains — and GOES-16 Water Vapor images with plots of Derived Motion Winds<\/strong><\/a> and contours of RAP40 model maximum wind speeds (below)<\/strong><\/em> revealed that the highest satellite-tracked Derived Motion Wind (DMW) speed was 182 knots<\/strong><\/a> over southern Montana at 1401 UTC. Some of the DMW speeds were nearly 10 knots faster than the RAP40 model maximum wind (for example, this 170-knot<\/strong><\/a> DMW over Wyoming at 1616 UTC).<\/p>\n

\"GOES-16<\/a>

GOES-16 Upper-level Water Vapor (6.2 \u00b5m)<\/em> images, with plots of 6.2 \u00b5m Derived Motion Winds and contours of RAP40 model maximum wind speeds [click to play animation | MP4<\/strong><\/a>]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

GOES-16\u00a0(GOES-East)\u00a0Upper-level Water Vapor (6.2\u00a0\u00b5m) images (above) displayed the signature of a leeside cold frontal gravity wave (reference) as it moved rapidly southward across the Plains (surface analyses) on 14 January 2021. Post-frontal wind gusts in the 50-70 knot range were seen, with a peak gust to 91 knots (105 mph) in eastern Wyoming. In addition, […]<\/p>\n","protected":false},"author":18,"featured_media":39660,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[74,25],"tags":[],"class_list":["post-39656","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-goes-16","category-satellite-winds"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39656","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=39656"}],"version-history":[{"count":10,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39656\/revisions"}],"predecessor-version":[{"id":39689,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/39656\/revisions\/39689"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/39660"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=39656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=39656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=39656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}