{"id":4956,"date":"2010-03-31T23:59:10","date_gmt":"2010-03-31T23:59:10","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=4956"},"modified":"2010-04-01T00:13:13","modified_gmt":"2010-04-01T00:13:13","slug":"a-foehn-gap-over-california-and-very-strong-jet-stream-winds-over-the-southwest-us","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/4956","title":{"rendered":"A Foehn gap over California, and very strong jet stream winds over the Southwest US"},"content":{"rendered":"<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_ir_vis_anim.gif\"><img loading=\"lazy\" decoding=\"async\" alt=\"MODIS water vapor. IR, and visible images\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_ir_vis_anim.gif\" title=\"MODIS water vapor. IR, and visible images\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">MODIS water vapor. IR, and visible images<\/p><\/div>\n<p>AWIPS images of the 1-km resolution MODIS 6.7 \u00c2\u00b5m water vapor channel, the 11.0 \u00c2\u00b5m IR channel, and the 0.65 \u00c2\u00b5m visible channel <strong><em>(above)<\/em><\/strong> showed a pronounced &#8220;Foehn gap&#8221; immediately <strong><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_topo_anim.gif\">downwind of the highest terrain<\/a><\/strong> of the Sierra Nevada mountain range on <strong>31 March 2010<\/strong>. <\/p>\n<p>A comparison of the 1-k resolution MODIS 6.7 \u00c2\u00b5m water vapor image with the corresponding 8-km resolution 6.7 \u00c2\u00b5m water vapor image from GOES-11 <strong><em>(below)<\/em><\/strong> demonstrates the ability to detect such features with better spatial resolution.<\/p>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_goes_wv_anim.gif\"><img loading=\"lazy\" decoding=\"async\" alt=\"1-km resolution MODIS and 8-km resolution GOES-11 water vapor images\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_goes_wv_anim.gif\" title=\"1-km resolution MODIS and 8-km resolution GOES-11 water vapor images\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">1-km resolution MODIS and 8-km resolution GOES-11 water vapor images<\/p><\/div>\n<p>Strong southwesterly winds aloft with speeds of 70-110 knots were creating this Foehn gap &#8212; but the core of a very strong jet stream was located a bit farther to the south and east. According to the RUC model, the highest wind speeds at the level of maximum Wind Speed was in excess of 140 knots over far northwestern Arizona and far southwestern Utah. However, there were a number of MADIS Atmospheric Motion Vectors (AMVs) that indicated wind speeds as high as 161 knots, 167 knots, 170 knots, and 179 knots <strong><em>(below)<\/em><\/strong>.<\/p>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_161.jpg\"><img loading=\"lazy\" decoding=\"async\" alt=\"MODIS water vapor image + RUC winds speeds + MADIS AMVs\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_161.jpg\" title=\"MODIS water vapor image + RUC winds speeds + MADIS AMVs\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">MODIS water vapor image + RUC winds speeds + MADIS AMVs<\/p><\/div>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_167.jpg\"><img loading=\"lazy\" decoding=\"async\" alt=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_167.jpg\" title=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">MODIS water vapor image + RUC wind speeds + MADIS AMVs<\/p><\/div>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_170.jpg\"><img loading=\"lazy\" decoding=\"async\" alt=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_170.jpg\" title=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" width=\"480\" height=\"459\" \/><\/a><p class=\"wp-caption-text\">MODIS water vapor image + RUC wind speeds + MADIS AMVs<\/p><\/div>\n<div style=\"width: 490px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_179.jpg\"><img loading=\"lazy\" decoding=\"async\" alt=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" src=\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-content\/uploads\/sites\/5\/2010\/03\/100331_modis_wv_winds_179.jpg\" title=\"MODIS water vapor image + RUC wind speeds + MADIS AMVs\" width=\"480\" height=\"480\" \/><\/a><p class=\"wp-caption-text\">MODIS water vapor image + RUC wind speeds + MADIS AMVs<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>AWIPS images of the 1-km resolution MODIS 6.7 \u00c2\u00b5m water vapor channel, the 11.0 \u00c2\u00b5m IR channel, and the 0.65 \u00c2\u00b5m visible channel (above) showed a pronounced &#8220;Foehn gap&#8221; immediately downwind of the highest terrain of the Sierra Nevada mountain range on 31 March 2010. A comparison of the 1-k resolution MODIS 6.7 \u00c2\u00b5m water [&hellip;]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[18,12],"tags":[],"class_list":["post-4956","post","type-post","status-publish","format-standard","hentry","category-goes-11","category-modis"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4956","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=4956"}],"version-history":[{"count":4,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4956\/revisions"}],"predecessor-version":[{"id":4960,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/4956\/revisions\/4960"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=4956"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=4956"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=4956"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}