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 is the domain of the 13-km RUC, whose output grids have this naming convention (all RUC output grids have the same corner points):

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
110 vs. NAM-12 0.125 deg lat/lon awldas 3 Hours
209 vs. NAM-12 44 Km Lambert Conformal awip44 3 Hours
211 vs. NAM-12 80 Km Lambert Conformal awp211 6 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories)
212 vs. NAM-12 40 Km Lambert Conformal awip3d 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories)
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, 00z/12z run)
File inventory (awip12, 06z/18z run)
File inventory (awphys, 00z/12z run)
File inventory (awphys, 06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories) Most recent graphics
221 vs. NAM-12 32 Km Lambert Conformal awip32 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories) Most recent graphics
104 vs. NAM-12 90 Km Polar Stereographic grbgrd 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories)
207 vs. NAM-12 95 Km Polar Stereographic awp207 6 Hours
216 vs. NAM-12 45 Km Polar Stereographic awipak 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		See Note 1 below Most recent graphics
217 vs. NAM-12 22.5 Km Polar Stereographic awp217 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories) Most recent graphics
237 vs. NAM-12 32 Km Lambert Conformal awp237 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories) Most recent graphics
242 vs. NAM-12 11.25 Km Lambert Conformal awp242 (2-d surface fields only), awak3d (3-d pressure level fields) 3 Hours File inventory (awak3d, 00z/12z run)
File inventory (awak3d, 06z/18z run) 		See Note 2 Most recent graphics
243 vs. NAM-12 0.4 degree lat/lon awiphi 3 Hours File inventory (00z/12z run)
File inventory (06z/18z run) 		Most recent files (go to "nam.YYYYMMDD" directories) Most recent graphics
236 vs. NAM-12 40 Km Lambert Conformal (RUC) See above See above File inventory Most recent files Most recent graphics
252 vs. NAM-12 20 Km Lambert Conformal (RUC) See above See above File inventory Most recent files Most recent graphics
255 vs. NAM-12 13 Km Lambert Conformal (RUC) See above See above Most recent files Most recent graphics
4 km HiResWindow grids vs. NAM-12 East/Central U.S and West/Central: 4 Km Lambert Conformal
Alaska : 4-km Polar Stereographic
Hawaii/Puerto Rico : 0.045 degree Lat/lon
(All grids are #255) 		awpreg, awp4km (East CONUS run only) Hourly Alaska File inventory (awpreg)
West File inventory (awpreg)
East File inventory (awpreg)
Hawaii File inventory (awpreg)
Puerto Rico File inventory (awpreg) 		Most recent files (go to "hiresw.YYYYMMDD" directories) Most recent graphics

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:

Disclaimer