![](\"https:\/\/cimss.ssec.wisc.edu\/satellite-blog\/images\/2023\/08\/230816_goes18_BC_pyroCb_anim.gif\")
<\/a>GOES-18 “Red” Visible (0.64 \u00b5m) + Fire Power derived product (top left), Shortwave Infrared (3.9 \u00b5m, top right), \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom left) and Cloud Top Temperature derived product (bottom right) [click to play animated GIF | MP4<\/strong><\/a>]<\/p><\/div>1-minute\u00a0Mesoscale Domain Sector<\/strong><\/a>\u00a0GOES-18\u00a0(GOES-West)<\/em> “Red” Visible (0.64 \u00b5m<\/strong><\/a>) + Fire Power derived product (a component of the GOES Fire Detection and Characterization Algorithm\u00a0FDCA<\/strong><\/a>), Shortwave Infrared (3.9 \u00b5m<\/strong><\/a>), \u201cClean\u201d Infrared Window (10.3 \u00b5m<\/strong><\/a>) and\u00a0Cloud Top Temperature<\/strong><\/a>\u00a0derived product images\u00a0(above)<\/strong><\/em> showed that the Crater Creek Fire — located in far southern British Columbia, less than 10 miles from the Washington border — produced a pyrocumulonimbus<\/strong><\/a> (pyroCb) cloud late in the day on 16 August 2023<\/strong><\/a>.<\/p>\n Cursor sampling of GOES-18 “Red” Visible (0.64 \u00b5m) + Fire Power derived product (top left), Shortwave Infrared (3.9 \u00b5m, top right), \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom left) and Cloud Top Temperature derived product (bottom right) at 0142 UTC [click to enlarge]<\/p><\/div>Beginning at 0023 UTC<\/strong><\/a> (prior to pyroCB development), the fire occasionally exhibited 3.9 \u00b5m brightness temperatures of 137.88\u00baC (the saturation temperature of the GOES-18 ABI<\/strong><\/a> Band 7 detectors) \u2014 and Fire Power values reached 3929.32 MW at 0142 UTC (above)<\/strong><\/em>. Cloud-top 10.3 \u00b5m brightness temperatures first reached the -40\u00baC pyroCb threshold (shades of blue) at 0035 UTC<\/strong><\/a> \u2014 and later cooled to a minimum of -42.31\u00baC (with a corresponding Cloud Top Temperature of -57.17\u00baC) at 0157 UTC (below)<\/strong><\/em>.<\/p>\n Cursor sampling of GOES-18 “Red” Visible (0.64 \u00b5m) + Fire Power derived product (top left), Shortwave Infrared (3.9 \u00b5m, top right), \u201cClean\u201d Infrared Window (10.3 \u00b5m, bottom left) and Cloud Top Temperature derived product (bottom right) at 0157 UTC [click to enlarge]<\/p><\/div>1-minute GOES-18 True Color RGB images from the CSPP GeoSphere<\/strong><\/a>\u00a0site\u00a0(below)<\/strong><\/em> showed the abrupt pyroCb pulse as it quickly rose above the wildfire smoke plume, and the pyroCb anvil as it then drifted north-northeastward.<\/p>\n<\/a><\/a>