How is shallow fog represented in weather reports?

Shallow fog is specifically represented in weather reports with the abbreviation "MIFG." This term stands for "Shallow Fog," which is defined as fog that has a horizontal visibility equal to or greater than 5/8 statute miles (about 1 km) and less than 2 meters in depth. This unique representation helps meteorologists and pilots distinguish this type of fog from other fog conditions that may exhibit different characteristics or visibility ranges.

The other options used in weather reporting do not accurately describe shallow fog. For instance, the abbreviation "FG" simply denotes fog without any qualifiers, which could encompass various types of fog, including dense fog. "SH FG" refers to shallow fog but is not the standard abbreviation used in formal reports. "FOG" is a general term and does not offer any specific information about the fog's characteristics, making it less precise than the abbreviation "MIFG." Understanding these distinctions is critical for accurate weather reporting and safe aviation operations.