The Collaborative International Dictionary of English v.0.48:

Meteorologist \Me`te*or*ol"o*gist\, n. [Cf. F.
   m['e]t['e]orologiste.]
   A person skilled in meteorology.
   [1913 Webster]

WordNet (r) 3.0 (2006):

meteorologist
    n 1: a specialist who studies processes in the earth's
         atmosphere that cause weather conditions

Moby Thesaurus II by Grady Ward, 1.0:

30 Moby Thesaurus words for "meteorologist":
   aerial photographer, aerographer, aerologist, aircrew, aircrewman,
   avigator, belly gunner, bombardier, crew, crew chief,
   flight attendant, flight crew, gunner, hostess, machine gunner,
   microclimatologist, navigator, steward, stewardess, weather bureau,
   weather forecast, weather forecaster, weather prophet,
   weather report, weather scientist, weather ship, weather station,
   weather-reporting network, weatherman, weatherologist