{"id":1722,"date":"2009-01-06T22:53:09","date_gmt":"2009-01-06T22:53:09","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=1722"},"modified":"2009-01-08T03:23:05","modified_gmt":"2009-01-08T03:23:05","slug":"the-effect-of-clouds-on-temperatures","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/1722","title":{"rendered":"The effect of stratus clouds on temperatures"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 fog\/stratus product<\/p><\/div>\n

AWIPS images of the\u00c2\u00a0 GOES-13 fog\/stratus product (above)<\/strong><\/em> showed a patch of stratus cloud that developed quickly as it moved northeastward across southern Wisconsin during the pre-dawn hours on 06 January 2009<\/a><\/strong>. In advance of this cloud feature, air temperatures were dropping off as clear skies and light winds were promoting strong radiational cooling – in southern Wisconsin, Boscobel (station identifier KOVS)<\/em> dropped to 2\u00c2\u00ba F (-17\u00c2\u00ba C)<\/strong> and Madison (station identifier KMSN)<\/em> dropped to 6\u00c2\u00ba F (-14\u00c2\u00ba C)<\/strong> shortly after 08 UTC (2 AM local time)<\/em>. However, after the arrival of the cloud feature, surface air temperatures quickly began to rise into the middle to upper teens F as the cloud deck began to trap heat that was radiating from the surface.<\/p>\n

Comparisons of the 4-km resolution GOES-13 fog\/stratus product with the 1-km resolution MODIS fog\/stratus product\u00c2\u00a0 during the early stages of formation of this stratus cloud deck (below)<\/strong><\/em> demonstrated the superior feature detection capability of the MODIS instrument. Also note that the GOES-13 fog\/stratus product exhibited a “false signal” along the western coast of Lake Michigan, where colder water temperatures in the low-mid 30s F<\/strong><\/a> were “confusing” the product — the improved spatial and spectral resolution of the MODIS channels allowed the creation of a “cleaner” fog\/stratus product.<\/p>\n

\"GOES-13<\/a>

GOES-13 and MODIS fog\/stratus product<\/p><\/div>\n

\"GOES-13<\/a>

GOES-13 and MODIS fog\/stratus product<\/p><\/div>\n

The development and growth of the stratus cloud feature was also evident on the GOES-13 Low Cloud Base product (below),<\/strong><\/em> portrayed an an extensive area of clouds having bases less than 1000 feet above the surface (red color enhancement)<\/em>.<\/p>\n

\"GOES-13<\/a>

GOES-13 Low Cloud Base product<\/p><\/div>\n

This cloud feature was apparently fairly deep, with the GOES-13 sounder Cloud Top Height product (below)<\/em><\/strong> indicating cloud tops in the 12,000 to 14,000 feet range (light green color enhancement)<\/em>.<\/p>\n

\"GOES-13<\/a>

GOES-13 Cloud Top Height product<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

AWIPS images of the\u00c2\u00a0 GOES-13 fog\/stratus product (above) showed a patch of stratus cloud that developed quickly as it moved northeastward across southern Wisconsin during the pre-dawn hours on 06 January 2009. In advance of this cloud feature, air temperatures were dropping off as clear skies and light winds were promoting strong radiational cooling – […]<\/p>\n","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13,15,11,12],"tags":[],"class_list":["post-1722","post","type-post","status-publish","format-standard","hentry","category-fog-detection","category-goes-sounder","category-goes-13","category-modis"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/1722","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=1722"}],"version-history":[{"count":6,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/1722\/revisions"}],"predecessor-version":[{"id":1744,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/1722\/revisions\/1744"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=1722"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=1722"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=1722"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}