What is the Planetary Boundary Layer?
From The Secret World of Weather: The lowest part of the atmosphere is the only area strongly influenced by the sun’s radiative heating of the…
Tag: cloud clues
The Meaning of Cloud Streets
On a flight back from Spain to the UK, we were treated to a great display of “cloud streets” over France. They form parallel to…
The Foehn Fish
Another very interesting email from Prof. Otta Wenskus: Hi Tristan, I just read your paragraph on altocumulus lenticularis. Sadly, while Ifind them beautiful, my feelings…
The Clouds Map the Ground
On first glance these clouds may appear random. But they are far from it. They are making a map of the ground for us. With…
How to Gauge High Winds Using Trees
The tops of trees or other fixed objects in the middle distance make it easier to gauge the effect of the wind on clouds or…
How to Navigate with Rainbows
Many people believe that a thing must be either beautiful or practical. But nature brims with examples that manage both. Rainbows are pretty, but they…
Signs in the Sky – New Animation!
Here is the second in the short series of short animations. Hope you enjoy! (If you missed the Water one, you can find that on…
22 Degree Halo and Contrail Shadow
My thanks to Alan Gibson, urbane forager and regular contributor to this blog, for another great image. In this picture we are looking at two…
How to Navigate Using the Upper Winds and Clouds
I have written in the past about the basics of using the weather to navigate. Here I’d like to offer a couple of tips to…