Your hoar frost photo submissions from the week If you have a picture you would like to add, you can send them to Managing Editor Sydney Mook at [email protected].

"These recent frosty days sent me on a hunt to remind myself once again of the difference between hoar frost and rime ice — as they tend to look virtually the same until you get an up-close look." ...

First, what is frost? Well, there are a few types, including frozen dew, but the most common is "hoar frost". "Depositional frost is also known as white frost or hoar frost.

Hoar frost, on the other hand, is formed from water vapor. So, on a morning with high humidity, we can wake up to frosty trees even without fog. ADVERTISEMENT.

Hoar frost spotted on a shaded and grassy spot of Council Crest Park in west Portland in late January 2025 (courtesy Josh Cozart) This uniquely named ice has an equally unique shape.

The December Cold Moon is due to light up the night skies this week. It will appear largest at 4:01 a.m. ET on Sunday, December 15, and marks the final full moon of the year.

Let's talk about how frost comes into existence. There are two types of frost: depositional (also known as white or hoar frost), and frozen dew.