How clouds form snow

January 14th, 2017
To understand snow formation, one must know a little about clouds.  Q: What is in a cloud? A: Air, dust, vapor, droplets, and often, ice.  Q: How much air? How much liquid water? How much ice? A: The answers will probably surprise you. See my short… more »

More frost patterns on black cars

January 7th, 2017
Black cars remain my favorite place to observe frost patterns. Here are a few I saw on one car today.   [image:46] The straight lines of frost are more common when it is drier. And it has been quite dry here due to the very low temperatures.  [image:50]… more »

Snow Science: an annotated list to topics

December 17th, 2016
For those interested in the science of snow, I give an annotated list of relevant blog links.   [image:45]   I) Seminar about snow science (sequence of four videos):  http://www.storyofsnow.com/blog1.php/trip-of-the-ice-man II) All the different types… more »

Two-level nature of branched crystals

December 11th, 2016
The common branched crystal looks like a paper cut-out, but actually has a complex 3-D nature. One aspect of this nature, which I have alluded to in prior posts, is the two-level structure: What appears to be happening on one plane, is actually… more »

How some snow crystals hide their droplet origin

December 5th, 2016
Look closely at the center of a snow crystal. In many, or most, you will often not find a droplet center as we described in the previous post. Indeed, for the columnar crystals, you may never see a droplet center. As an example, look at the center of… more »

How some snow-crystal centers retain their droplet origin

November 22nd, 2016
If you zoom in on the center of some snow crystals, you may see a small circle, or near circle. In some cases, the crystal will have other circles of similar size as well, but the one to focus on is the one at the exact center of the crystal. Here marks… more »

How the water molecules make corner pockets

November 11th, 2016
As I mentioned in my previous post, the formation of corner pockets on ice crystals is inexplicable by the standard theory of snow-crystal growth. Akira Yamashita had recently proposed a mechanism for corner pockets, though he had applied it to a… more »

Akira's Corner Pockets

May 10th, 2016
The evanescent snow crystal appears out of nowhere The lines and boundaries on its faces tell a story a story of its birth and life But before it all vanishes does anyone hear the story?   A few years back, a correspondent of mine, Professor Akira… more »

Story of Snow - Simplified Chinese edition

April 6th, 2016
Story of Snow - Simplified Chinese edition
A few copies of the simplified Chinese Edition of The Story of Snow arrived at my house a few days ago - here's what it looks like: The Story of Snow was originally published over 6 years ago (October, 2009) - so it's great to see continued developments… more »

100 Snowflake Photos

January 27th, 2015
I recently put together a new collection of 100 snowflake photos. The gallery ranges from some of the first photos I made (on film) in 1999 through photos made in early 2015. If you are interested in seeing more snowflake photos, follow this link: 100… more »