Description

This was a clipper type system 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".

WRF Domain

Initializations to run:

• 20150105 00 UTC
• 20150105 12 UTC

Hourly output out to 48 hours

Data pull

INIT_DATA 

• 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

OBS/RAW/PRECIP_OBS

• 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

OBS/RAW/RADAR_OBS

• NCEP radar mosaic

OBS/RAW/POINT_OBS

• 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/gen_pb2nc_cmds_3h_ndas.sh and run_pb2nc_cmds_3h_NDAS_all.sh 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?

Data on RAMADDA

• GFS 0.5 degree
• HRRR (additional inits)