Complex sentence: Open cellular patterns can often be found behind cold fronts in the cold unstable air, and produce multiple cloud types including cumulus congenstus, cumulonimbus, and stratocumulus clouds.
Split into simpler sentences: Open cellular patterns can often be found behind cold fronts in the cold unstable air. Open cells have been found to have multiple cloud types including cumulus congenstus, cumulonimbus, and stratocumulus clouds.