OPERATIONAL NORTH AMERICAN MESO : OUTPUT GRID COVERAGE

This web page shows the domains of the various output grids created from the operational NCEP North American Meso (NAM, formerly Eta) model forecast. The file naming convention is:

Also included are output grids from the Rapid Refresh (RAP), formerly Rapid Update Cycle (RUC), whose output grids have these naming conventions:

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

GRID NUMBER GRID TYPE NAMFIL GRID FREQUENCY LINKS TO GRID INVENTORY (IF AVAILABLE) LINK TO DATA ON NCEP'S FTP SERVER
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 Most recent GRIB2 files (go to "nam.YYYYMMDD" directories)
NAM Nest output grids vs. NAM integration domains 2.5 km Mercator (#194 for Puerto Rico)
2.5 km Mercator (#196 for Hawaii);
5.9 km Polar Sterographic (#198 for Alaska);
5.0 km Lambert Conformal (#227 for CONUS);
1.5 km Polar Stereographic (Alaska firewx nest);
1.33 km Lambert Conformal (CONUS firewx nest)
 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 36-h, 3-hourly to 60-h Alaska Nest inventory
CONUS Nest inventory
Fire Weather Nest inventory
Hawaii Nest inventory
Puerto Rico Nest inventory 		Most recent GRIB2 files (go to "nam.YYYYMMDD" directories)
104 vs. NAM-12 90 Km Polar Stereographic grbgrd 3 Hours File inventory Most recent GRIB2 files (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 Most recent GRIB2 files (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) 		Most recent GRIB2 files (go to "nam.YYYYMMDD" directories)
216 vs. NAM-12 45 Km Polar Stereographic awipak 3 Hours File inventory Most recent GRIB2 files (go to "nam.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (EMC web page)
217 vs. NAM-12 22.5 Km Polar Stereographic awp217 3 Hours File inventory (Fcst hours 00,03,15,27,39,51,63,75)
File inventory (All other forecast hours) 		Most recent GRIB2 files (go to "nam.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (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) 		Most recent GRIB2 files (go to "nam.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (EMC web page)
221 vs. NAM-12 32 Km Lambert Conformal awip32 3 Hours File inventory Most recent GRIB2 files (go to "nam.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (EMC web page)
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; see above See above Hourly, 24 cycles/day RAP output file inventories Most recent files Most recent graphics (Official NCEP web page)
Most recent graphics (ESRL RAP web page)
237 vs. NAM-12 32 Km Lambert Conformal awp237 3 Hours File inventory Most recent graphics (Official NCEP web page)
Most recent graphics (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 Most recent graphics (Official NCEP web page)
Most recent graphics (EMC web page)
243 vs. NAM-12 0.4 degree lat/lon awiphi 3 Hours File inventory Most recent GRIB2 files (go to "nam.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (EMC web page)
4 km HiResWindow grids (All except Guam)

4 km HiResWindow grids (Guam and Hawaii)

 East/Central U.S and West/Central: 4 Km Lambert Conformal
Alaska : 4-km Polar Stereographic
Hawaii/Puerto Rico/Guam : 0.045 degree Lat/lon
(All grids are #255) 		awpreg, awp4km (East CONUS run only) Hourly Alaska ARW File inventory (awpreg)
Alaska NMM File inventory (awpreg)
Western CONUS ARW File inventory (awpreg)
Western CONUS NMM File inventory (awpreg)
Eastern CONUS ARW File inventory (awpreg)
Eastern CONUS NMM File inventory (awpreg)
Eastern CONUS ARW File inventory (awp4km)
Eastern CONUS NMM File inventory (awp4km)
Hawaii ARW File inventory (awpreg)
Hawaii NMM File inventory (awpreg)
Puerto Rico ARW File inventory (awpreg)
Puerto Rico NMM File inventory (awpreg)
Guam ARW File inventory (awpreg)
Guam NMM File inventory (awpreg) 		Most recent files (go to "hiresw.YYYYMMDD" directories) Most recent graphics (Official NCEP web page)
Most recent graphics (EMC 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 (finally!)

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 (finally!)

Click here to get ASCII files of the latitude/longitude of all points on each output grid listed above. Each list contains:

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