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SESK: Stuff Everyone Should Know · sesk.info/drone-advection-fog-needs-wind

What makes advection fog different from radiation fog?

Advection fog needs wind to carry warm, moist air over a cold surface.

  1. It only forms in desert valleys
  2. It needs wind to form ✔
  3. It always burns off by mid-morning

Why: Advection fog forms when wind moves warm, moist air over cooler ground or water. It is common along coasts and can stick around for days.

Huh, didn't know that: If the wind tops about 15 knots, advection fog usually lifts into low stratus clouds.

The dad joke
Why did the fog travel? It was advection-ate about moving around.
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Sources

  1. FAA Pilot's Handbook of Aeronautical Knowledge, Ch. 12 Weather Theory https://www.faa.gov/sites/faa.gov/files/14_phak_ch12.pdf

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