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knorthern_knight
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knorthern_knight

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10 Nov 2013
The FIM model http://fim.noaa.gov/FIM/ is currently experimental, but my understanding is that it will eventually replace the GFS, once the kinks have been ironed out. The FIM8
  • 30 km grid
  • goes out to 366 hours in increments of 6 hours
  • done on 00Z and 12Z data
The FIM9
  • 15 km grid
  • goes out to 168 hours in increments of 6 hours
  • done 00Z, 06Z, 12Z, 18Z (06 and 18? Seriously?)
I notice differences between the outputs, especially near the far end of the FIM9 range. I understand Brett went to a briefing that covered FIM, among other things. Is Brett reading this? Any comments on which version is more accurate? My gut feeling is the FIM9, due to its smaller grid. But maybe at 30 km we've already reached the limit where "more precise" does not mean "more accurate". Here are a couple of forecast maps (FIM8 versus FIM9) for comparison. Both were based on 2013/11/10 12Z data and are valid 168 hours out 2013/11/17 12Z

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