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This was a clipper type system so resulting in a broader band of snow but very intense snowfall rates.   I (Phil) was on mids so I woke up around noon and looked outside and could only see 1/4 mi.  That rate lasted for 2 or 3 hours in SiouxFalls.   This event was fairly well forecast by the operational models, including HiRes WRF and NMM - all predicted a band at least 48 h out.  The location was somewhat uncertain.  I believe total snowfall was generally 4-7".

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WRF Domain

Initializations to run:

  • 20150105 00 UTC
  • 20150105 12 UTC



  • GFS (0.25 degree) - Not available for this date
  • GFS (0.5 degree) - pulled, on YS and RAMADDA
  • NAM (grid 218)
  • HRRR - pulled, on RAMADDA


  • CCPA
  • MRMS (gcorr, ptype, prate, reflec)
    • Gauge-corrected NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/mrms_gcorr
    • Precip type NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/mrms_ptype
    • Precip rate NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/mrms_prate
    • Comp reflectivity NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/mrms_compref


  • NDAS prepbufr
    • NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/ndas
    • Processed: yslogin3:/glade/p/ral/jnt/MMET/OBS/NDAS_03h
      • Ran: yslogin3:/glade/p/ral/jnt/MMET/scripts/ and to process native NDAS pb files (run pb2nc and rename appropriately)
  • RAP prepbufr: 
    • NATIVE: yslogin3:/glade/p/ral/jnt/MMET/OBS/NATIVE/rap_pb
    • Processed: Do we want to pre-process or run pb2nc in the script?

Put relevant data on mandan-> RAMADDA


  • GFS 0.5 degree
  • HRRR (additional inits)