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Which TAF change group indicates temporary fluctuations expected to last less than an hour at a time?
Choices
FM
FM marks a rapid, lasting change from a stated time.
BECMG
BECMG marks a gradual, lasting change over a period.
✓ TEMPOcorrect
TEMPO denotes brief temporary fluctuations expected to last under an hour.
PROB
PROB states a probability, not a temporary fluctuation duration.
Why
TEMPO marks temporary fluctuations expected to last less than an hour at a time, while FM is a rapid lasting change and BECMG a gradual one.
FAA source: FAA-H-8083-28 (TAF)browse the reference library →
This is taught in Decoding METARs and TAFs — study the lessons free, then practice with grading and mastery tracking.
Original study question written for this course — representative of FAA knowledge-test topics, not an actual current FAA exam question.