NAM/RAP/HRRR/HIRESW : OUTPUT GRIDS, PRODUCTS, GRAPHICS

This web page shows the domains of the various output grids created from the operational NCEP NAM, RAP, HRRR, and HIRESW forecasts. The NAM file naming convention is:

Click on the grid number below to get a map which shows the grid domain. For NAM output grids, the NAM computational domain is shown on each map with dashed lines.

NAM OUTPUT GRIDS

GRID NUMBER GRID TYPE
(Links to grid specifications if avaiilable)
NAMFIL GRID FREQUENCY LINKS TO GRID INVENTORY (IF AVAILABLE) LINK TO DATA ON NCEP'S NOMADS SERVER LINK TO MODEL FORECAST GRAPHICS
NAM Native grid domains
12 km B-grid (large domain); NAM B-grid nests (imbedded domains)
bgrdsf (12 km NAM Native surface parameter file)
Hourly to 36-h, 3-hourly thereafter
File inventory Go to "nam.YYYYMMDD" directories
NAM Nest output grids vs. NAM integration domains
  • Puerto Rico: 2.5 km Mercator
  • Hawaii: 2.5 km Mercator
  • Alaska: 2.976 km Polar Sterographic
  • CONUS: 3 km Lambert Conformal
  • Alaska FW: 1.5 km Polar Stereographic
  • CONUS FW: 1.5 km Lambert Conformal
  • conusnest.hiresf (CONUS), alaskanest.hiresf (Alaska), hawaiinest.hiresf (Hawaii), priconest.hiresf (Puerto Rico), firewxnest.hiresf (Fire Weather nest)
    Fire weather nest : Hourly to 36-h; all other nests: hourly to 60-h
    Alaska Nest inventory
    CONUS Nest inventory
    Fire Weather Nest inventory
    Hawaii Nest inventory
    Puerto Rico Nest inventory
    Go to "nam.YYYYMMDD" directories
    Official NCEP web page, called NAM-HIRES for CONUS/AK/HI/PR, "FIREWX" for Fire Weather
    EMC web page
    EMC Fire weather nest web page

    104 vs. NAM-12
    90 Km Polar Stereographic
    grbgrd 3 Hours File inventory Go to "nam.YYYYMMDD" directories
    110 vs. NAM-12
    0.125 deg lat/lon
    awldas 3 Hours File inventory
    151 vs. NAM-12
    32 km Polar Stereographic
    awp151 3 Hours File inventory
    NAM AFWA grids vs. NAM-12
    0.108 degree lat/lon
    afwaak (Alaska, grid #183), afwaca (Central America/Caribbean, grid #181), afwacs (CONUS, grid #180), afwahi (Hawaii, grid #182)
    3 Hours Alaska File inventory
    Central America/Caribbean inventory
    Hawaii File inventory
    CONUS File inventory

    207 vs. NAM-12
    95 Km Polar Stereographic
    awp207 6 Hours File inventory
    211 vs. NAM-12
    80 Km Lambert Conformal
    awp211 6 Hours File inventory Go to "nam.YYYYMMDD" directories
    212 vs. NAM-12
    40 Km Lambert Conformal
    awip3d 3 Hours File inventory (Fcst hours 00,03,15,27,39,51,63,75)
    File inventory (All other forecast hours)
    Go to "nam.YYYYMMDD" directories
    216 vs. NAM-12
    45 Km Polar Stereographic
    awipak 3 Hours File inventory Go to "nam.YYYYMMDD" directories Official NCEP web page
    EMC web page
    218 vs. NAM-12
    12 Km Lambert Conformal
    awip12 (2-d surface fields), awphys (3-d pressure level fields)
    3 Hours (awip12): Hourly from 0-36h, 3 Hourly from 39-84 h (awphys)
    File inventory (awip12, Fcst hours 00,03,15,27,39,51,63,75)
    File inventory (awip12, All other forecast hours)
    File inventory (awphys, Fcst hours 00-08,10-11,13-17,19,20,22-23,25-29,31-32,34-35,39,51,63,75)
    File inventory (awphys, All other forecast hours)
    Go to "nam.YYYYMMDD" directories Official NCEP web page
    EMC web page
    237 vs. NAM-12
    32 Km Lambert Conformal
    awp237 3 Hours File inventory Official NCEP web page
    EMC web page
    242 vs. NAM-12
    11.25 Km Polar Stereographic
    awp242 (2-d surface fields only), awak3d (3-d pressure level fields) 3 Hours File inventory (awak3d) See Note 2 Official NCEP web page
    EMC web page
    243 vs. NAM-12
    0.4 degree lat/lon
    awiphi 3 Hours File inventory Go to "nam.YYYYMMDD" directories Official NCEP web page
    EMC web page

    HIRESW OUTPUT GRIDS

    GRID NUMBER GRID TYPE
    (Links to grid specifications if avaiilable)
    NAMFIL GRID FREQUENCY LINKS TO GRID INVENTORY (IF AVAILABLE) LINK TO DATA ON NCEP'S FTP SERVER LINK TO MODEL FORECAST GRAPHICS
    HiResWindow grids (All except Guam)

    HiResWindow grids (Guam and Hawaii)

  • CONUS: 2.5km/3km/5km Lambert Conformal
  • Alaska: 3km/5km Polar Stereographic
  • HI: 2.5 km/5 km Mercator
  • PR: 2.5 km/5 km Mercator
  • Guam: 2.5 km/5 km Mercator
  • CORE_RES.fHH.DOMAIN.grib2, CORE=arw or nmmb, DOMAIN=conus, ak, hi, pr, or guam, RES=2p5km or 5km
    CORE_RES.fHH.DOMAINmem2.grib2, CORE=arw, DOMAIN=conus, ak, hi, pr, or guam, RES=2p5km or 5km
    Hourly List of Hiresw grid inventories (obsolete) Go to "hiresw.YYYYMMDD" directories Official NCEP web page
    EMC web page

    RAP/HRRR OUTPUT GRIDS

    GRID NUMBER GRID TYPE
    (Links to grid specifications if avaiilable)
    NAMFIL GRID FREQUENCY LINKS TO GRID INVENTORY (IF AVAILABLE) LINK TO DATA ON NCEP'S FTP SERVER LINK TO MODEL FORECAST GRAPHICS
    221 vs RAP-13
    130 vs RAP-13
    200 vs RAP-13
    236 vs RAP-13
    242 vs RAP-13
    252 vs RAP-13
    RAP output grids:
    #221 (32 Km N. America Lambert Conformal
    #130 (13 Km N. America Lambert Conformal
    #200 (16 Km Puerto Rico Lambert Conformal)
    #200 (32 km CONUS Lambert Conformal)
    #242 (11.25 km Alaska Polar Stereographic)
    #252 (20 km CONUS Lambert Conformal)
    32 km N. America: awip32
    13 km : awp130
    16 km : awp200
    32 km CONUS : awp236
    11.25 km : awp242
    20 km : awp252
    Hourly
    RAP output file inventories Go to rap.YYYYMMDD directories Official NCEP web page
    ESRL/GSD RAP web page
    3 KM HRRR grid
    3 Km Lambert Conformal
    wrfprs, wrfnat, wrfsfc, wrfsubh
    Hourly, some fields every 15 minutes
    File inventory Go to hrrr.YYYYMMDD directories Official NCEP web page
    ESRL/GSD HRRR web page

    NOTE 1: Grids "awipak", "awip20", "awip12", "awip3d", "awp211", and "grbgrd" are available on the NWS TOC server at ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/, once in this directory click on "MT.nam_CY_HH", where HH=cycle time (00,06,12,18), and then click on "RD.YYYYMMDD", where YYYY=year, MM=month, DD=day. Then click on "PT.grid_DF.gr1" which will get you to the NAM GRIB data

    NOTE 2: Grid "awp242" is also available on the NWS TOC server at ftp://tgftp.nws.noaa.gov/SL.us008001/ST.opnl/, once in this directory click on "MT.nam_AR_ak_CY_HH", where HH=cycle time (00,06,12,18), and then click on "RD.YYYYMMDD", where YYYY=year, MM=month, DD=day. Then click on "PT.grid_DF.gr1" which will get you to the NAM GRIB data

    Click here to get ASCII files of the latitude/longitude of all points for most of output grids listed above. Each list contains:

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