{"id":7395,"date":"2011-01-13T18:59:48","date_gmt":"2011-01-13T18:59:48","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=7395"},"modified":"2011-01-25T17:53:03","modified_gmt":"2011-01-25T17:53:03","slug":"northeast-us-winter-storm","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/7395","title":{"rendered":"Northeast US winter storm"},"content":{"rendered":"
\"GOES-13<\/a>

GOES-13 6.5 \u00c2\u00b5m water vapor images (click image to play animation)<\/p><\/div>\n

A strong “Nor’easter” winter storm impacted much of the northeastern US on 12 January<\/a> – 13 January 2011<\/a><\/strong>. The storm exhibited a nice presentation on AWIPS images of the GOES-13 6.5 \u00c2\u00b5m “water vapor channel” data (above; click image to play animation)<\/strong><\/em>. Storm total snowfall amounts included 36.0 inches<\/strong> at Wilmington, Vermont, 34.5 inches<\/strong> at Savoy, Massachusetts, and 29.5 inches<\/strong> at North Haven, Connecticut (HPC Storm Summary<\/strong><\/a>).<\/p>\n

A comparison of the GOES-13 6.5 \u00c2\u00b5m water vapor image at 18:15 UTC and the corresponding MODIS<\/a><\/strong> 6.7 \u00c2\u00b5m water vapor image at 18:16 UTC (below)<\/strong><\/em> demonstrates the value of better spatial resolution (1 km on the MODIS image)<\/em> for depicting subtle storm structures. Also note the slight northwestward “parallax shift” of the features on the GOES-13 image, due to the large viewing angle from GOES-13 (which is positioned over the Equator at 75\u00c2\u00ba West longitude)<\/em>.<\/p>\n

\"MODIS<\/a>

MODIS 6.7 \u00c2\u00b5m and GOES-13 6.5 \u00c2\u00b5m water vapor channel images<\/p><\/div>\n

\"GOES-13<\/a>

GOES-13 water vapor + RUC80 PV1.5 pressure + Cross Section line<\/p><\/div>\n

There was a strong Potential Vorticity (PV) anomaly associated with this storm — in fact, a northwest-to-southeast oriented cross section of RUC80 model fields through the developing “comma structure” seen on GOES-13 water vapor imagery at 15 UTC\u00c2\u00a0 (above)<\/strong><\/em> showed that the tropopause (taken to be the pressure of the PV1.5 surface)<\/em> had been drawn downward to near the 800 hPa pressure level (below)<\/strong><\/em>.<\/p>\n

\"RUC80<\/a>

RUC80 model cross section<\/p><\/div>\n

A sequence of 1-km resolution MODIS 11.0 \u00c2\u00b5m IR and POES AVHRR<\/a><\/strong> 10.8 \u00c2\u00b5m IR image (below)<\/strong><\/em> showed the development of banding features with IR brightness temperatures as cold as -50 to -60\u00c2\u00ba C (orange to red color enhancement)<\/em>.<\/p>\n

\"MODIS<\/a>

MODIS 11.0 \u00c2\u00b5m and POES AVHRR 10.8 \u00c2\u00b5m IR images<\/p><\/div>\n

After the storm departed, a comparison of a 13 January MODIS 0.65 \u00c2\u00b5m visible channel image with the corresponding MODIS Red\/Green\/Blue (RGB) image — created using MODIS channels 01\/07\/07 — showed the extent of some of the snow cover (which appears as the darkest shades of red on the RGB image),<\/em> as well as the presence of supercooled water droplet clouds and glaciated ice crystal clouds (which show up as light gray\u00c2\u00a0and lighter shades of red on the RGB image, respectively)<\/em>.<\/p>\n

\"MODIS<\/a>

MODIS 0.65 \u00c2\u00b5m visible image + MODIS false-color Red\/Green\/Blue (RGB) image<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"

A strong “Nor’easter” winter storm impacted much of the northeastern US on 12 January – 13 January 2011. The storm exhibited a nice presentation on AWIPS images of the GOES-13 6.5 \u00c2\u00b5m “water vapor channel” data (above; click image to play animation). Storm total snowfall amounts included 36.0 inches at Wilmington, Vermont, 34.5 inches at […]<\/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":[22,11,12,26,45,5],"tags":[],"class_list":["post-7395","post","type-post","status-publish","format-standard","hentry","category-avhrr","category-goes-13","category-modis","category-poes","category-redgreenblue-rgb-images","category-winter-weather"],"acf":[],"_links":{"self":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7395","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=7395"}],"version-history":[{"count":12,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7395\/revisions"}],"predecessor-version":[{"id":7510,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/posts\/7395\/revisions\/7510"}],"wp:attachment":[{"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/media?parent=7395"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/categories?post=7395"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/wp-json\/wp\/v2\/tags?post=7395"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}