If fog obscures the entire sky and visibility into the fog is three hundred feet, how should this condition be reported?

When reporting weather conditions, it is essential to use the correct codes that accurately represent the visibility and cloud cover. In this scenario, fog is obscuring the entire sky, which indicates that visibility is significantly reduced to just three hundred feet.

The appropriate reporting for conditions where visibility is less than one statute mile, particularly when the sky is obscured by fog, is indicated as "VV" followed by the vertical visibility in hundreds of feet. In this case, "VV003" indicates that the vertical visibility is three hundred feet.

This reporting format is specific to situations where visibility is severely restricted, such as during fog, haze, or other obscurations.

The other options include different cloud cover designations that do not accurately reflect visibility conditions in fog. "BKN000" and "OVC000" refer to broken and overcast clouds, respectively, but do not convey the obscured visibility caused by fog. "SKC" signifies a clear sky, which is not applicable in this situation where fog is present. Thus, "VV003" is the precise and correct reporting for the described weather condition.