Give the upper atmosphere dust, and it will make cirrus clouds. It has long been a mystery exactly what causes the formation of cirrus clouds, the wispy billows of ice that can be seen high in the sky ...

Answer: Clouds form when sufficiently moist air is cooled to the dew point temperature of the air or below, so that either liquid water droplets form on cloud condensation nuclei, or in the case of ...

Long-lived contrails form predominantly not in cloud-free skies, but within already existing ice clouds. This is the ...

Have you ever looked up at the clouds in the sky and wondered how they form? Understanding cloud formation is really important for studying weather patterns and making accurate forecasts. Those clouds ...

Contrails in the blue sky remind us of daily air traffic—and its impact on the climate. However, the effect of contrails on ...

This week's question comes from Regina, who asks about one of the basic elements of our weather, "Why do clouds form?" Meteorologist Rob Shackelford: This might sound like a weird analogy, but I need ...

It's common knowledge that rain helps flowers bloom. But new research suggests the opposite may also be true: Pollen from flowers could help form clouds and bring about rain. In a study published this ...

How did the Red Planet get all of its clouds? CU Boulder researchers may have discovered the secret: just add meteors. Astronomers have long observed clouds in Mars’ middle atmosphere, which begins ...