Which term indicates foggy conditions in TAF reports?

In TAF reports, the term that indicates foggy conditions is represented by the abbreviation "BR." This term specifically refers to mist or fog that can reduce visibility significantly but does not meet the stricter criteria for being officially labeled as fog. In aviation weather reporting, "BR" indicates reduced visibility due to moisture in the air, which aligns with the conditions associated with fog.

The term "FG" is another abbreviation used in weather reports that does indicate fog conditions but may not be used in TAFs. On the other hand, "HZ" signifies haze, which involves different atmospheric conditions that may not be as dense as fog and typically refers to visibility reduction due to particulates in the air. The term "FOG" is a common term in broader weather descriptions but is not specific to TAFs, where standardized abbreviations are preferred for clarity and brevity. Therefore, "BR" is the correct term to use for indicating foggy conditions in TAF reports.