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Long-range or seasonal forecasting aims to predict weather at lead times of :

  • A.3 to 5 days
  • B.7 days to 3 weeks
  • C.annual
  • D.a month or a season

Answer: D

Long-range or seasonal forecasts aim at lead times of a month or a season.

Weather forecasts are classed by lead time: short-range (up to about 3 days), medium-range (about 3 to 10 days), extended-range (about 10 to 30 days) and long-range or seasonal (a month to a season or more). The India Meteorological Department's long range forecast of the south-west monsoon is an example.

3 to 5 days is short to medium range, 7 days to 3 weeks is extended range, and annual predictions are climate outlooks rather than seasonal forecasts.

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