{"id":7082,"date":"2010-11-02T18:57:30","date_gmt":"2010-11-02T18:57:30","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=7082"},"modified":"2011-01-24T19:17:11","modified_gmt":"2011-01-24T19:17:11","slug":"lake-mendota-fog-features","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/7082","title":{"rendered":"Lake Mendota fog features"},"content":{"rendered":"
\"AO&SS<\/a>

AO&SS building rooftop camera (facing northwest)<\/p><\/div>\n

Nocturnal radiation fog formed over Lake Mendota<\/a><\/strong> (the largest of the 4 lakes in the immediate vicinity of Madison, Wisconsin)<\/em> on 02 November 2010<\/strong><\/a> — the evolution and motion of this fog was captured by a northwest-facing camera (above; smaller 640×480 version<\/a>)<\/em><\/strong> mounted on the top of the Atmospheric, Oceanic, and Space Sciences<\/a><\/strong> building on the University of Wisconsin – Madison campus (Google map<\/a><\/strong>). The camera video begins at 09:54 UTC (4:54 am local time)<\/em> and ends at 15:39 UTC (10:39 am local time)<\/em>. During the daylight hours, there even appeared to be evidence of a local-scale cyclonic circulation within the fog feature along the southern shore of Lake Mendota. Thanks to Pete Pokrandt, AOS, for supplying the QuickTime animation.<\/em><\/p>\n

AWIPS images of the 4-km resolution GOES-13 fog\/stratus product at night (followed by 1-km resolution GOES-13 0.63 \u00c2\u00b5m visible channel images after sunrise) are shown below. In spite of the high amount of noise and “false fog\/stratus pixels” (yellow enhancement),<\/em> the GOES-13 fog\/stratus product did show a relatively persistent fog signal over Lake Mendota through much of the night-time hours — and then the fog features could then be seen dissipating on the GOES-13 visible images after sunrise. On both the rooftop camera video and the GOES-13 visible images, the fog features appeared to be drifting to the southwest — in fact, the surface visibility at the Middleton Municipal Airport (KC29<\/a><\/strong>, located just to the west of Lake Mendota<\/a><\/strong>)<\/em> dropped to 0.15 mile, while the surface visibility at Madison’s Dane County Regional Airport airport (KMSN<\/a><\/strong>, located just to the east of Lake Mendota)<\/em> only fell to 3.0 miles.<\/p>\n

\"GOES-13<\/a>

GOES-13 fog\/stratus product + GOES-13 0.63 \u00c2\u00b5m visible channel images<\/p><\/div>\n

An AWIPS image of the POES AVHRR<\/a><\/strong> 1-km resolution Sea Surface Temperature product (below)<\/em><\/strong> indicated that SST values over the central portion of Lake Mendota were as warm as 54.5\u00c2\u00ba F at 23:55 UTC (6:55 PM local time)<\/em> before sunset. With light winds and strong radiational cooling during the night, the surface air temperate at nearby Madison Dane County Regional Airport (KMSN<\/a><\/strong>)<\/em> cooled to 27\u00c2\u00ba F — and with such a large difference in water vs air temperature, thick fog eventually began to form over Lake Mendota.<\/p>\n

\"POES<\/a>

POES AVHRR Sea Surface Temperature product<\/p><\/div>\n

Looking ahead to the future GOES-R<\/a><\/strong> era, Geostationary Cloud Algorithm Test-bed (GEOCAT<\/a><\/strong>) images of a GOES-R Fog Probability product (below)<\/em><\/strong> did indeed suggest that fog probabilities were increasing across south-central Wisconsin during the night-time hours as radiational cooling continued.<\/p>\n

\"GEOCAT<\/a>

GEOCAT experimental GOES-R Fog Probability product<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

Nocturnal radiation fog formed over Lake Mendota (the largest of the 4 lakes in the immediate vicinity of Madison, Wisconsin) on 02 November 2010 — the evolution and motion of this fog was captured by a northwest-facing camera (above; smaller 640×480 version) mounted on the top of the Atmospheric, Oceanic, and Space Sciences building on […]<\/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":[22,13,11,34,26],"tags":[],"class_list":["post-7082","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-fog-detection","category-goes-13","category-goes-r","category-poes"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7082","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=7082"}],"version-history":[{"count":28,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7082\/revisions"}],"predecessor-version":[{"id":7085,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7082\/revisions\/7085"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=7082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=7082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=7082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}