{"id":28464,"date":"2018-06-09T23:59:06","date_gmt":"2018-06-09T23:59:06","guid":{"rendered":"http:\/\/cimss.ssec.wisc.edu\/satellite-blog\/?p=28464"},"modified":"2018-06-11T21:34:31","modified_gmt":"2018-06-11T21:34:31","slug":"pyrocumulonimbus-cloud-in-colorado","status":"publish","type":"post","link":"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/archives\/28464","title":{"rendered":"PyroCumulonimbus cloud in Colorado"},"content":{"rendered":"

\"GOES-16<\/a>

GOES-16 “Red” Visible (0.64 \u00b5m, left),<\/em> Shortwave Infrared (3.9 \u00b5m, center)<\/em> and “Clean” Infrared Window (10.3 \u00b5m, right)<\/em> images, with hourly plots of surface reports [click to play MP4 animation]<\/p><\/div>GOES-16 (GOES-East)<\/em> “Red” Visible (0.64 \u00b5m<\/strong><\/a>), Shortwave Infrared (3.9 \u00b5m<\/strong><\/a>) and “Clean” Infrared Window (10.3 \u00b5m<\/strong><\/a>) images (above)<\/strong><\/em> showed the formation of a small pyroCumulonimbus (pyroCb) cloud spawned by the 416 Fire<\/strong><\/a> in southwestern Colorado on 09 June 2018<\/strong><\/a>. A Mesoscale Domain Sector was positioned over the region, providing images at 1-minute intervals.<\/p>\n

On Shortwave Infrared imagery, the thermal anomaly or “hot spot” appeared as a large cluster of red pixels — and the top of the pyroCb cloud took on a darker gray appearance than nearby high-altitude ice crystal clouds (due to enhanced solar reflectance off the smaller ice crystals of the pyroCb anvil). On 10.3 \u00b5m imagery, cloud-top infrared brightness temperatures cooled to around -50\u00baC (bright yellow enhancement) <\/em>as the pyroCb drifted northeastward.<\/p>\n

\"NOAA-19<\/a>

NOAA-19 AVHRR Visible (0.63 \u00b5m),<\/em> Shortwave Infrared (3.7 \u00b5m)<\/em> and Infrared Window (10.8 \u00b5m)<\/em> images, with plots of 22 UTC surface reports [click to enlarge]<\/p><\/div>On 1-km resolution NOAA-19 AVHRR Infrared Window (10.8 \u00b5m) imagery at 22:07 UTC (above)<\/strong><\/em>, the minimum cloud-top brightness temperature was -53\u00baC — this temperature roughly corresponded to an altitude of 11.6 km according to 00 UTC rawinsonde data<\/strong><\/a> from Grand Junction, Colorado (below)<\/strong><\/em>.<\/p>\n

\"Plots<\/a>

Plots of rawinsonde data from Grand Junction, Colorado [click to enlarge]<\/p><\/div>\n

<\/p>\n
\n

Pretty incredible 100-mile distant view of the #Pyrocumulus<\/a> over the #416fire<\/a> in southwest Colorado! Looking south from Matchett Park in Grand Junction. @NWSGJT<\/a> #COwx<\/a> pic.twitter.com\/7mgHkigcx1<\/a><\/p>\n

\u2014 Michael Charnick (@charnick_wx) June 9, 2018<\/a><\/p><\/blockquote>\n