What are the two main conditions that some scientists hypothesize are needed for successful cloud seeding?

Scientists hypothesize that two main conditions are necessary for successful cloud seeding: the presence of supercooled liquid water and sufficient atmospheric instability. Supercooled liquid water allows for the formation of ice crystals when introduced to cloud seeding agents, while atmospheric instability promotes upward air movement, enhancing precipitation development. Together, these conditions increase the likelihood of effective cloud seeding outcomes.