Closed weather

{
  "id": "MLC-T-MET-010435",
  "term": "Closed weather",
  "field": "Meteorology and atmospheric science",
  "definition": "Weather conditions at an aerodrome characterized by a low cloud ceiling and poor visibility that are below the minimums required for visual flight rules (VFR) operations. Such conditions necessitate that pilots operate under instrument flight rules (IFR), effectively closing the airport to aircraft not equipped for IFR or pilots not rated for it. Specific thresholds vary by jurisdiction but often involve a ceiling below 1,000 feet or visibility less than three statute miles.",
  "url": "https://mlchart.com/terminology/meteorology/closed-weather/"
}