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SESK: Stuff Everyone Should Know · sesk.info/sport-cold-front

What defines a cold front?

Cold, dense air advances and replaces warmer air.

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  1. Warm air advancing and replacing colder air
  2. Cold, dense air advancing and replacing warmer air ✔
  3. Two air masses stalled side by side

Why: In a cold front, a mass of cold, dense, stable air pushes in and replaces warmer air. The warm air is forced upward, which can bring sudden storms and gusty winds.

Huh, didn't know that: A warm front is the reverse: warm air advances and replaces a body of colder air.

The dad joke
The cold front and the warm front never got along. Every meeting ended in a heated argument.
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References

Answer: Cold, dense air advancing and replacing warmer air. In a cold front, a mass of cold, dense, stable air pushes in and replaces warmer air. The warm air is forced upward, which can bring sudden storms and gusty winds.

  1. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 12 www.faa.gov/sites/faa.gov/files/14_phak_ch12.pdf
    A cold front occurs when a mass of cold, dense, and stable
    Checked 2026-10-11.
  2. FAA Pilot's Handbook of Aeronautical Knowledge, Chapter 12 www.faa.gov/sites/faa.gov/files/14_phak_ch12.pdf
    A warm front occurs when a warm mass of air advances
    Checked 2026-10-11.

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