Quick Facts
- Type
- Cloud Cover Descriptor
- Also Known As
- OVC
- Used By
- Pilots, Dispatchers
Definition#
OVC (Overcast) is a sky condition in METARs and TAFs indicating that 8/8 (all) of the sky is obscured by cloud. An overcast layer always constitutes a ceiling.
Why It Matters Operationally#
An OVC layer at low altitude greatly restricts visual operations and requires IFR procedures. Combined with low visibility, OVC conditions may require CAT II or CAT III ILS approaches.