Home › Part 107 Practice Tests › Aviation Weather Questions › Question 22
In a TAF, what does a group beginning with 'FM', such as 'FM180000', signal?
- A.A rapid and significant change in conditions from that time onward
- B.Fog and mist expected at 1800 Zulu
- C.A temporary fluctuation lasting less than one hour
Correct answer
A. A rapid and significant change in conditions from that time onward
Why
FM means 'from' and marks the start of a new prevailing condition set that replaces the previous group. The time after FM is the date and hour when the change begins.
Source: FAA-G-8082-22 Ch. 3 · ACS knowledge area: Aviation Weather Sources and Effects · From the Aviation Weather practice bank (WEA-022).