← All explained questions · Weather Theory
In a TAF, which 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 temporary fluctuations expected to be brief and non-persistent.
PROB0
PROB0 is not a standard TAF group; probability groups use values like PROB30/PROB40.
Why
TEMPO marks temporary conditions expected to last less than an hour at a time; FM marks a rapid lasting change and BECMG a gradual one.
FAA source: AIM 7-1 / Aviation Weather Handbook FAA-H-8083-28browse the reference library →
This is taught in Reading 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.