To understand how clouds get their shape, it helps to understand the basics of how they form. When air rises and cools, the ...

But, if you watch this great video on how clouds form by my friends at Minute Earth, you’ll understand exactly how this all works. There were two parts in that video that I want to emphasize.

Those are clouds that form usually about 6500 to about 2000 feet. That's why we call mid level clouds. An example is an alto Stratos club. Lastly, the highest type of clouds, ...

Diagram showing that high moisture environments have more dense and lower clouds vs. drier climates that have higher and less dense clouds. In humid climates clouds form at lower heights and densely.

What are these crazy clouds everyone saw, and how do they form? Mammatus clouds were on display this week in Colorado. To stream 9NEWS on your phone, you need the 9NEWS app.

Nacreous clouds form over polar regions in our lower stratosphere between 68,500 and 100,000 feet (13 and 19 miles or 20 and 30 kilometers) according to the UK Met Office.