{"id":128,"date":"2011-09-13T22:30:19","date_gmt":"2011-09-13T22:30:19","guid":{"rendered":"http:\/\/rammb.cira.colostate.edu\/research\/goes-r\/proving_ground\/blog\/?p=128"},"modified":"2026-03-06T09:05:41","modified_gmt":"2026-03-06T16:05:41","slug":"synthetic-fog-product","status":"publish","type":"post","link":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/2011\/09\/13\/synthetic-fog-product\/","title":{"rendered":"Synthetic Fog Product"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter\"><a href=\"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare.png\"><img loading=\"lazy\" decoding=\"async\" width=\"896\" height=\"1344\" src=\"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare.png\" alt=\"Synthetic Fog Product based on the 15- to 18-hour forecasts from the NSSL WRF-ARW (left), and GOES-11 Visible Imagery (right)\" class=\"wp-image-129\" srcset=\"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare.png 896w, https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare-200x300.png 200w, https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare-683x1024.png 683w, https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-content\/uploads\/sites\/6\/2011\/09\/13sep11_simfog_vis_compare-768x1152.png 768w\" sizes=\"auto, (max-width: 896px) 100vw, 896px\" \/><\/a><figcaption class=\"wp-element-caption\">Synthetic Fog Product based on the 15- to 18-hour forecasts from the NSSL WRF-ARW (left), and GOES-11 Visible Imagery (right)<\/figcaption><\/figure>\n\n\n\n<p>A new synthetic difference product is now being produced from the NSSL WRF-ARW output: the fog product, or 10.35 &#8211; 3.9&nbsp;\u03bcm.&nbsp; In order to generate synthetic 3.9 \u03bcm imagery in a timely manner, it&#8217;s necessary to assume that it&#8217;s always night because the solar reflected calculations are too expensive.&nbsp; This allows the traditional fog product to be displayed for all forecast hours of the WRF.&nbsp; In the example above, the color scheme for the synthetic fog product (left) is designed such that grey into light blue represents increasing confidence in liquid water clouds.&nbsp; Note the forecast stratus clouds in the San Francisco Bay area, and compare that to the observed GOES-11 visible imagery on the right.&nbsp; The WRF-generated fog product forecast does a good job with the location and dissipation time of the low clouds.&nbsp; Such a forecast might be quite useful for the aviation industry given how often low clouds and fog cause delays at the West Coast airports.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A new synthetic difference product is now being produced from the NSSL WRF-ARW output: the fog product, or 10.35 &#8211; 3.9&nbsp;\u03bcm.&nbsp; In order to generate synthetic 3.9 \u03bcm imagery in a timely manner, it&#8217;s necessary to assume that it&#8217;s always night because the solar reflected calculations are too expensive.&nbsp; This allows the traditional fog product [&hellip;]<\/p>\n","protected":false},"author":8,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9],"tags":[],"class_list":["post-128","post","type-post","status-publish","format-standard","hentry","category-synthetic-nssl-wrf-arw-imagery"],"_links":{"self":[{"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/posts\/128","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/users\/8"}],"replies":[{"embeddable":true,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/comments?post=128"}],"version-history":[{"count":1,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/posts\/128\/revisions"}],"predecessor-version":[{"id":1214,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/posts\/128\/revisions\/1214"}],"wp:attachment":[{"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/media?parent=128"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/categories?post=128"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/rammb2.cira.colostate.edu\/proving-ground-blog\/wp-json\/wp\/v2\/tags?post=128"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}