wunder beta

📘 How fog forms near the ground

Learn how dew point, cooling, condensation nuclei, inversions, and advection turn air opaque.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

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What you’ll learn

Visibility
Dew point
Radiation fog
Advection fog
Inversion
Mixing fog
Droplet growth
Dissipation
Forecasting
Travel safety

Questions this course answers

What is fog?

Fog is a surface-level cloud that reduces visibility.

What is the dew point?

Cooling air to its dew point begins condensation.

How does radiation fog commonly form?

Radiative heat loss cools the ground and adjacent air.

What is advection fog?

Horizontal transport over a cold surface cools air to saturation.

What often clears fog?

Warming or mixing evaporates droplets or disperses saturated air.

Grounded in trusted sources

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Every Wunder lesson is built from real, reputable sources — never invented.

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