Introduction

The -set_date option changes the reference date of the in-memory grib (sub-)message. You can write out the message with the new date by the -grib (fast) and -grib_out (slow) options. Of course if the in-memory grid values have changed, you have to use the latter option.

The -set_date X option changes the date code to X.

Usage

-set_date  X
                    X = starting date
                    X=YYYY, YYYYMM, YYYYMMDD, YYYYMMDDHH, YYYYMMDDHHmm, YYYYMMDDHHmmSS
                    YYYY=year, MM=month, DD=day, HH=hour, mm=minute, SS=second
                    if MM/DD/HH/mm/SS is missing, the original MM/DD/mm/SS is unaltered

Example

# every field has the same date code
$ wgrib p.grb -set_date 2010020304
1:0:d=2010020304:PRMSL:mean sea level:3 hour fcst:
2:17960:d=2010020304:PRES:1 hybrid level:3 hour fcst:
3:34248:d=2010020304:HGT:1 hybrid level:3 hour fcst:
4:48055:d=2010020304:TMP:1 hybrid level:3 hour fcst: