Pyrocumulonimbus cloud in Alberta
![](https://cimss.ssec.wisc.edu/satellite-blog/images/2023/05/ab_4p-20230505_004021.png)
GOES-18 Fire Temperature RGB (top left), “Clean” Infrared Window (10.3 µm, top right), Cloud Top Height (bottom left) and Cloud Top Temperature (bottom right) [click to play animated GIF | MP4]
A plot of 0000 UTC rawinsonde data from Edmonton, Alberta (below) indicated that the pyroCb cloud-top temperatures colder than -60ºC were close to the tropopause temperature, suggesting that some smoke and cloud material may have been injected into the lower stratosphere.
GOES-18 True Color RGB images from the CSPP GeoSphere site are shown below.![](https://cimss.ssec.wisc.edu/satellite-blog/images/2023/05/goeswest_abi_radf_true_color_night_20230505003021.png)
GOES-18 True Color RGB images [click to play animated GIF | MP4]