What does MIFG denote on a METAR report?

MIFG on a METAR report indicates "shallow fog," which is characterized by fog that is less than 6 feet deep. This specific notation is important for pilots and aviation meteorologists because it provides information on visibility conditions that can affect flight safety and operations.

Shallow fog typically leads to reduced visibility, but it is not as thick as denser fog, allowing for some level of discernible features or objects. Therefore, pilots can make informed decisions regarding takeoff, landing, and other flight maneuvers based on the presence of MIFG.

Understanding these terms is crucial for interpreting METAR reports accurately, particularly since different weather phenomena can significantly affect aviation operations. Knowing that MIFG refers to shallow fog helps in assessing how it may impact visibility for pilots and ground operations.