I have discovered a problem with Grid 104 which is listed in the Grid.dat file as NGM SUPER C-GRID but apparently is also used for other models, in this case the NAM (formerly ETA).
This problem was found in an attempt to view a cross section.
I then ran the ALON command and got the following.
I have also had this problem when working with data that uses Grid 221 (North American Regional Reanalysis).
Thank you,
Kevin
Data sources:
ftpprd.ncep.noaa.gov/pub/data/nccf/com/nam/prod
files used ---> nam.t**z.grbgrd21.tm00
tgftp.nws.noaa.gov/ST.opnl/MT.nam_CY.**/RD.YYYYMMDD/PT.grid_DF.gr1
files used ---> fh.0021_tl.press_gr.grbbgrd
** = Model run -- 00, 06, 12, 18
BLUE number is the forecast hour
Output from the beginning of the NGRB2PCG32.OUT FILE
Code: Select all
FILE: nam.t18z.grbgrd00.tm00
---NEW GRIB DATA FILE OPENED
===== BEGIN READ ===== IGB100( 1 & 2) COPIED TO 1 & 2
GRIB EDITION 1
===== BEGIN NEW GRIB EDITION 1 RECORD =====
REC#,SIZE = 1 26786
NBYTES,IRDRC7,IRDREC= 26786 267 267
IRDST/IRDEND/IGRBZZ= 3 266 3
KPDS= 7 84 104 192 130 102 0 5 10 4 18 0 1 0 0 0 0 1 2
ACCUM 0 0 0 0 PRSE PRSE
INPUT YR/MO/DY/HR/FHR/LVL=2005/10/ 4/18/ 0/ MSL - PARAM=130 (PRSE MSL)
GRID DEFINITIONS OBTAINED FROM GRIB GDS SECTION
... OUTPUT FILE= c:\PCGRIDDS32\GRIDDATA\OCT040518.ETA104
REQUESTED GRID BEING PROCESSED
--- ADDING GRID-> 2 PRSE MSL 2005 10 4 18 0 2
A,NX,NY= 101177.5 147 110
GRN,GRX,RANGE= -22.94989 22.94983 0.2578636
--- ADDING GRID-> 3 MSG00000 2005 10 4 18 0 7
A,NX,NY= 1.000000 147 110
GRN,GRX,RANGE= -1.0000000E-25 9.1084400E-44 5.6179776E-28
--- ADDING GRID-> 4 MSG10000 2005 10 4 18 0 12
A,NX,NY= 0.0000000E+00 147 110
GRN,GRX,RANGE= -1.0000000E-25 9.1084400E-44 5.6179776E-28
MAP PROJECTION = NPST
GRID DESCRIPTION SECTION = 5 147 110
-268 -139475 8 -105000 90755 90755
0 64 0 0 0 0
0 0 0 0 255 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0 0 0 0 0 0
0
NPTS = 16170
GRID PROJECTION TYPE = NPST
--- ADDING GRID-> 5 ALAT0000 2005 10 4 18 0 17
A,NX,NY= -0.2679985 147 110
GRN,GRX,RANGE= -0.8700314 0.8700295 9.7756227E-03
--- ADDING GRID-> 6 ALON0000 2005 10 4 18 0 22
A,NX,NY= 139.4751 147 110
GRN,GRX,RANGE= -359.2842 359.7989 4.039793
--- ADDING GRID-> 7 HGHT0000 2005 10 4 18 0 27
A,NX,NY= 0.0000000E+00 147 110
GRN,GRX,RANGE= -1.0000000E-25 9.1084400E-44 5.6179776E-28
--- ADDING GRID-> 8 DMAP0000 2005 10 4 18 0 32
A,NX,NY= 48407.97 147 110
GRN,GRX,RANGE= -480.8623 482.1035 5.409921
--- ADDING GRID-> 9 FFFF0000 2005 10 4 18 0 37
A,NX,NY= -1.2968197E-05 147 110
GRN,GRX,RANGE= -1.4380022E-06 2.5712072E-05 1.5252850E-07
--- ADDING GRID-> 10 EDIR0000 2005 10 4 18 0 42
A,NX,NY= -34.47509 147 110
GRN,GRX,RANGE= -359.7998 359.2832 4.039793
--- ADDING GRID-> 11 GRDX0000 2005 10 4 18 0 47
A,NX,NY= 1.000000 147 110
GRN,GRX,RANGE= 1.3592595E-43 1.000008 5.6180209E-03
--- ADDING GRID-> 12 GRDY0000 2005 10 4 18 0 52
A,NX,NY= 1.000000 147 110
GRN,GRX,RANGE= 1.3592595E-43 1.000008 5.6180209E-03