Towards sunset a pyroCb formed in Cecil Plains in Queensland, Australia. Starting at 7:00 UTC on 05 December, the animation below (also available as an MP4) shows Himawari-8 0.63 µm visible (left) and 3.9 µm shortwave IR (right) . The pyroCb cloud (~28.2º S, 151ºE) formed around 7:50 UTC. In the shortwave IR images, the red pixels indicate very hot IR brightness temperatures exhibited by the fire source regions.
![Himawari-8 0.63 µm visible channel (left) and 3.9 µm shortwave IR channel images (right) (click to play animation)](http://pyrocb.ssec.wisc.edu/wp-content/uploads/2016/12/161205_him_vis_anim-1-1024x768.gif)
Himawari-8 0.63 µm visible channel (left) and 3.9 µm shortwave IR channel images (right) (click to play animation).
In addition, the Himawari-8 10.4 μm IR channel allowed the cloud-top IR brightness temperature to be measured. The animation below, also starting at 7:00 UTC on 05 December, shows that the brightness temperature for the pyroCb cloud reached roughly -59ºC at 9:10 UTC (red color enhancement).
1-km resolution POES AVHRR images (below; courtesy of René Servranckx) showed pyroCb cloud-top IR brightness temperatures as cold as -66.6º C at 8:39 UTC.
![](http://pyrocb.ssec.wisc.edu/wp-content/uploads/2016/12/20161205_0839UTC_N18_ch3_ch4.jpg)
POES AVHRR Shortwave Infrared (left) and Infrared Window (right)