Training Guide in Surface Weather Observations - Multiple Choices

Example 5-2. One Layer with Single Cloud Base.
If the layer is on the ground, the sky cover is the eighths of the sky hidden by the phenomenon. That
portion of the surfaced-based layer through which the sky can be seen is not considered sky cover. In
WSOH, the concept is described under “Obscurations.” An obscuration that hides part of the sky is
reported in both the sky condition and remarks.
Surface-based obscurations are reported in the sky condition with a height of “000.” A layer height of
“000” could also mean the layer reported is 50 feet. To distinguish between a layer aloft and an
obscuration, use a remark to describe if the layer reported is really an obscuration.
The amount of sky hidden (FEW, SCT, BKN) is prefixed to the height of “000,” e.g., FEW000 (