/usr/share/eccodes/definitions/metar/weatherCodes-metar-template.txt is in libeccodes-data 2.0.2-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 | +DS
+DZ
+FC
+FZDZ
+FZRA
+FZUP
+PL
+RA
+SG
+SHGR
+SHGS
+SHRA
+SHSN
+SHUP
+SN
+SS
+TSGR
+TSGS
+TSRA
+TSSN
+TSUP
+UP
BCFG
BLDU
BLSA
BLSN
BR
DRDU
DRSA
DRSN
DS
-DS
DU
DZ
-DZ
FC
FC
-FC
FG
FU
FZDZ
-FZDZ
FZFG
FZRA
-FZRA
FZUP
-FZUP
HZ
IC
MIFG
PL
-PL
PO
PRFG
RA
-RA
SA
SG
-SG
SHGR
-SHGR
SHGS
-SHGS
SHRA
-SHRA
SHSN
-SHSN
SHUP
-SHUP
SN
-SN
SQ
SS
-SS
TS
TSGR
-TSGR
TSGS
-TSGS
TSRA
-TSRA
TSSN
-TSSN
TSUP
-TSUP
UP
-UP
VA
|