GRIB2 - TABLE 1.2

Significance of Reference Time

In Section 1, Octet 12

Revised 09/18/2025


Code Figure Meaning
0
 Analysis
1
 Start of Forecast
2
 Verifying Time of Forecast
3
 Observation Time
4
 Local Time
5
 Simulation Start (see Note 1)
6-191
 Reserved
192-254
 Reserved for Local Use
255
 Missing


Notes:

(1)  For use with downstream models (from NWP) such as dispersion modeling or air quality.


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