On 23 June 2017 a pyroCb formed in Yukon. GOES-15 detected the smoke plumes and pyroCb cloud, as well as the fires hot spot. The pyroCb cloud (~66º N, 137.5ºW) formed around 1:00 UTC . Starting at 0:00 UTC on 23 June, the animation below shows GOES-15 0.63 µm visible (left) and 3.9 µm shortwave IR (right) . In the shortwave IR images, the red pixels indicate very hot IR brightness temperatures exhibited by the fire source regions.
In addition, using GOES-15 10.7 μm IR channel the cloud-top IR brightness temperature could be found. The animation below, starting at 2:00 UTC on 23 June, shows the brightness temperature for the pyroCb cloud reaching near -47ºC at 5 UTC (green color enhancement).