Obscurations

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obscuration

  1. (Also called obscured sky cover.) In U.S. weather observing practice, the designation for the sky cover when the sky is completely hidden by surface-based obscuring phenomena.

    It is encoded "X" in aviation weather observations; it always constitutes a ceiling, the height of which is the value of vertical visibility into the obscuring phenomenon.
    Compare partial obscuration.

  2. A surface-based obscuring phenomenon.


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