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Which use does a forecast sounding from a model serve?

  • A.It provides the initial conditions from which the numerical model itself will subsequently be integrated forward
  • B.It shows the expected profile at a chosen place and time
  • C.It replaces the observed sounding entirely, so that radiosonde ascents are no longer required for forecasting
  • D.It gives the observed profile

Answer: B

Model output can be presented as a sounding at any grid point and forecast hour, which lets the forecaster apply the whole apparatus of parcel analysis to the predicted atmosphere. Observations remain essential for verifying the model and for data assimilation. The forecast sounding is a product of the model rather than an input to it.

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