Page History

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• medium range ensemble (ENS):
  • is run twice daily, base times 00 UTC and 12 UTC, producing a 10 day forecast (Day0 to Day10) and also a 15 day forecast (Day0 to Day15). 
  • has horizontal resolution of 9 Km and vertical resolution of 137 model levels.  These values are the same as those of the High Resolution (HRES) in earlier IFS versions.
  • has 50 ensemble members plus a control member (control10 CONTROL-10 for the 10 day forecast, control15 CONTROL-15 for the 15 day forecast).
  • control10 CONTROL-10 is the unperturbed ensemble member and corresponds to the High Resolution (HRES) in earlier IFS versions.  The output maintains  CONTROL-10 forecasts maintain continuity of output for users.
• extended range ensemble:
  • is run once daily, base time 00 UTC, producing a 46 day forecast (Day0 to Day46).
  • has horizontal resolution of 36 Km and vertical resolution of 137 model levels.  
  • has 100 members plus a control member.
• a multi-layer snow scheme was introduced.

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