{"id":23748,"date":"2017-04-13T15:59:25","date_gmt":"2017-04-13T15:59:25","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=23748"},"modified":"2017-04-16T00:34:18","modified_gmt":"2017-04-16T00:34:18","slug":"mountain-waves-over-the-sierra-nevada","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/23748","title":{"rendered":"Mountain waves over the Sierra Nevada"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 7.3 \u00b5m (left), 6.9 \u00b5m (center) and 6.2 \u00b5m (right) Water Vapor images [click to play animation]<\/p><\/div>\u00a0** The GOES-16 data posted on this page are preliminary, non-operational data and are undergoing testing. **<\/em><\/p>\n

A comparison of GOES-16 Lower-level (7.3 \u00b5m<\/strong><\/a>), Mid-level (6.9 \u00b5m<\/strong><\/a>) and Upper-level (6.2 \u00b5m<\/strong><\/a>) Water Vapor images (above)<\/strong> <\/em>revealed the presence of numerous mountain waves over parts of California and Nevada on 13 April 2017<\/strong><\/a>. The more pronounced of these waves were caused by strong southwesterly winds interacting with\u00a0 higher terrain of the Sierra Nevada<\/strong><\/a>.<\/p>\n

A 3-satellite comparison of GOES-15 (GOES-West),<\/em> GOES-16 and GOES-13 (GOES-East)<\/em> Water Vapor images (below)<\/strong> <\/em>highlighted 2 factors that allowed better detection of these mountain waves by GOES-16 — improved spatial resolution (2 km for GOES-16 at satellite sub-point, vs 4 km for GOES-15\/13), and a more direct satellite viewing angle (GOES-16 is positioned at 105\u00baW longitude, while GOES-15 is at 135\u00baW and GOES-13 is at 75\u00baW).<\/p>\n

\"OES-15<\/a>

GOES-15 (6.5 \u00b5m, left), GOES-16 (6.9 \u00b5m, center) and GOES-13 (6.5 \u00b5m, right) Water Vapor images [click to play animation]<\/p><\/div>Note that there were no Visible cloud features associated with many of the waves seen on Water Vapor imagery (below);<\/strong><\/em> encounters of Clear Air Turbulence (CAT) often occur with these types of mountain waves, as seen by scattered pilot reports of moderate turbulence (plotted as Category 4).<\/p>\n

\"GOES-16<\/a>

GOES-16 Visible (0.64 \u00b5m, left) and Water Vapor (6.9 \u00b5m, right) images, with pilot reports of turbulence [click to play animation]<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

\u00a0** The GOES-16 data posted on this page are preliminary, non-operational data and are undergoing testing. ** A comparison of GOES-16 Lower-level (7.3 \u00b5m), Mid-level (6.9 \u00b5m) and Upper-level (6.2 \u00b5m) Water Vapor images (above) revealed the presence of numerous mountain waves over parts of California and Nevada on 13 April 2017. The more pronounced […]<\/p>\n","protected":false},"author":18,"featured_media":23752,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21,11,43,74],"tags":[],"class_list":["post-23748","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-aviation","category-goes-13","category-goes-15","category-goes-16"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/23748","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=23748"}],"version-history":[{"count":7,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/23748\/revisions"}],"predecessor-version":[{"id":23756,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/23748\/revisions\/23756"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media\/23752"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=23748"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=23748"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=23748"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}