Takeoff is not authorized under the what weather and airfield lighting conditions?
Weather conditions are below FAA-established minima.
Wind limitations are exceeded.
Obs from the flt deck indicate that t/o cannot be made by following approved procedures.
During night operations, when the CA cannot ensure sufficient runway lighting exists to allow the takeoff to be completed safely.
Runway contamination limits are exceeded (e.g., water, slush, snow, braking action).
Greater than light freezing rain exists at the airport.
There are known or probable severe icing conditions. (No a/c will be dispatched when in the opinion of the CA and/or Dispatcher icing conditions exist or are anticipated that might adversely affect the safety of the flt. Flts may be dispatched into light to mod icing conditions only if all deicing equipment for the aircraft is in operable condition).
There is known or prob severe turbulence.
Frost, snow, or ice is adhering to the leading edge devices, any control surface, tab surface, upper wing surface, or winglets.