weather servicesFAA-published sample question (ATM, Aug 2021)
What is the reported ceiling in the following METAR? KHOT 181253Z AUTO 00000KT M1/4SM FG VV001 08/08 A3000 RMK AO2 SLP158 T00780078
A
Indefinite at 100 feet.✓ Correct Answer
B
Variable at 100 feet.
C
Measured at 100 feet.
Explanation
VV001 reports vertical visibility of 100 feet into an obscuration (here fog), which is treated as an indefinite ceiling at 100 feet. It is not a measured or variable ceiling.
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