On 21 June one pyroCu formed in the Northwest Territories. GOES-15 detected the smoke plume and pyroCu cloud, as well as the fire hot spot. The pyroCu (64 N 124 W) occurred at around 4:30 UTC. Starting at 4:00 UTC on 21 June, the animation below shortwave IR (3.9 μm, click image to play animation), visible imagery was not available at this time because the fire occurred at night. In the shortwave IR images the red pixels indicate very hot IR brightness temperatures exhibited by the fire source region.
In addition, using GOES-15 10.7 μm IR channel the cloud-top IR brightness temperature could be found. The animation below, starting at 5:00 UTC on 21 June, shows the brightness temperature for the pyroCu to be ~ -26ºC around 7:00 UTC (dark blue color enhancement) The minimum brightness temperature for a pyroCb is -40ºC, meaning this is a pyroCu.