Pyrocumulonimbus clouds in the Northwest Territories
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2023/07/nwt_4p-20230722_004022.png)
GOES-18 Day Land Cloud Fire RGB (top left), Shortwave Infrared (3.9 µm, top right), “Red” Visible (0.64 µm) + Fire Temperature derived product (bottom left) and “Red” Visible (0.64 µm) + Fire Power derived product (bottom right) [click to play animated GIF | MP4]
At 2300 UTC, the 3.9 µm infrared brightness temperature reached 90.85C, with a Fire Power value of 3623 MW (below). Located at a latitude of 67.35N, this wildfire was only about 40 miles south of the Arctic coast.
The 2 pyroCb clouds began to form at 2340 UTC and 0010 UTC — when pyrocumulus jumps were evident in the RGB and Visible images. Cloud-top 10.3 µm infrared brightness temperatures eventually were as cold as -54.7C.