The Collaborative International Dictionary of English v.0.48:

Forecast \Fore"cast\, n.
   Previous contrivance or determination; predetermination.
   [1913 Webster]

         He makes this difference to arise from the forecast and
         predetermination of the gods themselves. --Addison.
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   2. A calculation predicting future events; the foresight of
      consequences, and provision against them; prevision;
      premeditation; as, the weather forecast.
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            His calm, deliberate forecast better fitted him for
            the council than the camp.            --Prescott.
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The Collaborative International Dictionary of English v.0.48:

Forecast \Fore*cast"\, v. t.
   1. To plan beforehand; to scheme; to project.
      [1913 Webster]

            He shall forecast his devices against the
            strongholds.                          --Dan. xi. 24.
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   2. To foresee; to calculate beforehand, so as to provide for;
      as, to forecast the weather; to forecast prices.
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            It is wisdom to consider the end of things before we
            embark, and to forecast consequences. --L'Estrange.
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The Collaborative International Dictionary of English v.0.48:

Forecast \Fore*cast"\, v. i.
   To contrive or plan beforehand.
   [1913 Webster]

         If it happen as I did forecast.          --Milton.
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WordNet (r) 3.0 (2006):

forecast
    n 1: a prediction about how something (as the weather) will
         develop [syn: prognosis, forecast]
    v 1: predict in advance [syn: forecast, calculate]
    2: judge to be probable [syn: calculate, estimate, reckon,
       count on, figure, forecast]
    3: indicate by signs; "These signs bode bad news" [syn: bode,
       portend, auspicate, prognosticate, omen, presage,
       betoken, foreshadow, augur, foretell, prefigure,
       forecast, predict]