GOES-15 0.63 µm visible (left) and 3.9 µm shortwave IR (right) images (click to play animation)
On August 11, 2014 a fire in northern California produced a pyroCb detected by GOES-15 0.63 µm visible channel and 3.9 µm shortwave IR channel images (above; click image to play animation) around 21:15 UTC located near 41º North and 123º West rapidly drifting northwest in the direction as the surrounding convection. On the shortwave IR images (right panel), the red pixel enhancement shows when the fire hot spot reaches a IR brightness temperature of 338.3 K.
The corresponding GOES-15 10.7 µm IR channel images (below; click to play animation) indicated that the pyroCb cloud feature displayed a minimum IR brightness temperature value of -43.9º C around 21:00 UTC. As the pyroCb developed, the cloud top continued to get colder reaching temperatures as cold as -55º C (approximately).
GOES-15 10.7 µm IR images (click to play animation)