![Himawari-8 “Red” Visible (0.64 µm, top), Shortwave Infrared (3.9 µm, middle) and “Clean” Infrared Window (10.4 µm, bottom) [click to play animation | MP4]](https://cimss.ssec.wisc.edu/goes/blog/wp-content/uploads/2019/11/191122_himawari8_visible_shortwaveInfrared_longwaveInfraredWindow_Australia_pyroCb_anim.gif)
Himawari-8 “Red” Visible (0.64 µm, top), Shortwave Infrared (3.9 µm, middle) and “Clean” Infrared Window (10.4 µm, bottom) [click to play animation | MP4]
VIIRS True Color Red-Green-Blue (RGB) and Infrared Window (11.45 µm) images from Suomi NPP and NOAA-20 as viewed using RealEarth are shown below. Cloud-top 11.45 µm brightness temperatures of the northern pyroCb thunderstorm were in the -70 to -75ºC range on the later 0407 UTC Suomi NPP image.
![VIIRS True Color RGB and Infrared Window (11.45 µm) images from Suomi NPP and NOAA-20 [click to enlarge]](https://cimss.ssec.wisc.edu/goes/blog/wp-content/uploads/2019/11/191122_noaa20_suomiNPP_viirs_trueColorRGB_infraredWindow_Australia_pyrocbs_anim.gif)
VIIRS True Color RGB and Infrared Window (11.45 µm) images from Suomi NPP and NOAA-20 [click to enlarge]
The coldest Himawari-8 10.4 µm brightness temperature (BT) associated with the southernmost thunderstorm was -67.0ºC at 0520 UTC (with the northern pyroCb thunderstorm, closer to the fire complex, reaching -66.9ºC at 0500 UTC). According to 00 UTC rawinsonde data from nearby Williamtown (below), those BTs were 2-3ºC colder than the coded tropopause temp of -64.5ºC at 12.6 km. The VIIRS 11.45 µm BTs were nearly 10ºC colder than the tropopause, suggesting significant penetration of overshooting tops into the lower stratosphere.
![Plot of rawinsonde data from Williamtown, New South Wales [click to enlarge]](https://cimss.ssec.wisc.edu/goes/blog/wp-content/uploads/2019/11/191122_00UTC_YSWM_RAOB.GIF)
Plot of rawinsonde data from Williamtown, New South Wales [click to enlarge]