National Centers for Environmental Prediction (part of the US National Oceanic and Atmospheric Administration [NOAA], National Weather Service [NWS]). NCEP comprises 9 centres; one of those centres is responsible for running the atmospheric prediction models (see MRF).
NCEP
Meaning of NCEP in English
Weather and meteorology English vocabulary. Английский словарь погоды и метеорологии . 2012