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SESK: Stuff Everyone Should Know · sesk.info/drone-taf-valid-period

How long is a scheduled TAF valid?

A TAF is valid for 24 or 30 hours.

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  1. Exactly 6 hours
  2. 24 or 30 hours ✔
  3. Seven calendar days

Why: A scheduled Terminal Aerodrome Forecast covers a 24-hour or 30-hour period. Scheduled TAFs are issued four times daily, with amendments made when needed.

Huh, didn't know that: TAFs use many of the same weather abbreviations found in METARs.

The dad joke
Why did the TAF carry a clock? Its forecast had a valid period.
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References

Answer: 24 or 30 hours. A scheduled Terminal Aerodrome Forecast covers a 24-hour or 30-hour period. Scheduled TAFs are issued four times daily, with amendments made when needed.

  1. FAA Remote Pilot Study Guide www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/remote_pilot_study_guide.pdf
    Each TAF is valid for a 24 or 30-hour time period and is updated four times a day
    Checked 2026-10-09.

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