screenshot of a website showing NASA satellite data and cloud images

FIRMS can be used to track Pyrocumulonimbus (PyroCb) events using the OMPS Aerosol Index (AI) and OMPS PryroCb Product. This series of images shows a PyroCb event on 17 August 2021. This first image is a true color Visible Infrared Imaging Radiometer Suite (VIIRS) image of the Northern U.S. and Southern Canada. Milky white areas are smoke from wildfires (bright white areas are clouds). Credits: NASA LANCE FIRMS US/Canada