Operational weather limits
From Glossary of Meteorology
operational weather limits
(Also called minimums.) The limiting values of ceiling, visibility and wind, or runway visual range, established as safety minimums for aircraft landings and takeoffs.
Civil aircraft operate under limits stated in Civil Air Regulations and military aircraft operate under limits established by the respective military organizations. Limits for day and night operations usually differ. Also, the limits vary according to airport environment, navigational aids, and type of aircraft.