> ## Content Index
> Fetch the complete content index at: https://evergreen.samadesign.dev/llms.txt
> Use this file to discover other available public pages before exploring further.

# Fog, a field guide
- URL: https://evergreen.samadesign.dev/fog-a-field-guide/
- Published: 2026-09-12T10:00:00.000Z
- Updated: 2026-09-12T10:00:00.000Z
- Description: Advection, radiation, valley fog: a short guide to the weather that makes forests look like memories.
- Author: Anna Lindqvist
- Tags: Visual stories, Journal, Norway, #Import 2026-10-07 01:53

There are mornings when the forest behind the house disappears entirely, and then returns tree by tree as the sun climbs. I have photographed those mornings for ten years, and I am still learning to read them.

![Conifers emerging from the morning fog on a hillside](https://images.unsplash.com/photo-1583606638441-b9c746100447?auto=format&fit=crop&w=2000&q=80)

Radiation fog, lifting from the hillside at half past seven. Photo by Jan Huber / [Unsplash](https://unsplash.com/?utm%5Fsource=samadesign%5Fdemo&utm%5Fmedium=referral)

**Radiation fog** forms on clear, still nights when the ground cools quickly. It lies low and lifts in the morning: be outside before sunrise.

**Valley fog** pools in the low ground and leaves the hilltops clear. Climb above it and you will see the forest floating.

**Sea fog** rolls in from the water on warm days. It is the most theatrical and the least predictable.

![Dark pine trees disappearing into thick fog](https://images.unsplash.com/photo-1702474447694-e8c8dc2508e0?auto=format&fit=crop&w=2000&q=80)

When the fog is thick, look for one tree, not the whole forest. Photo by Fredrik Solli Wandem / [Unsplash](https://unsplash.com/?utm%5Fsource=samadesign%5Fdemo&utm%5Fmedium=referral)