True or False: Partial obscurations constitute a ceiling.

The statement can be understood through the definitions used in aviation weather reporting. A ceiling is defined as the height above the ground of the lowest layer of clouds or obscuring phenomena, such as fog, that restricts visibility. For a condition to be classified as a ceiling, there must be continuous cloud cover or obstruction that affects visibility over a significant area.

Partial obscurations do not meet this definition because they do not provide a continuous layer of cloud. For instance, if some areas are clear while others are covered, this scenario does not constitute a ceiling as the continuous layer required is absent. Instead, only areas of obscuration can be reported, which does not qualify for determining a ceiling. Thus, the statement is false.