WMO CODE TABLE 4019

4019

t_R Duration of period of reference for amount of precipitation, ending at the time of the report

Code figure
1	Total precipitation during the 6 hours preceding the observation
2	Total precipitation during the 12 hours preceding the observation
3	Total precipitation during the 18 hours preceding the observation
4	Total precipitation during the 24 hours preceding the observation
5	Total precipitation during the 1 hours preceding the observation
6	Total precipitation during the 2 hours preceding the observation
7	Total precipitation during the 3 hours preceding the observation
8	Total precipitation during the 9 hours preceding the observation
9	Total precipitation during the 15 hours preceding the observation

Notes:

If the duration of the period of reference is not covered by Code table 4019 or the period does not end at the time of the report, t_R shall be coded 0.
Members are recommended to avoid any deviations from international practices which require the use of code figure 0. The specification of code figure 0 should be indicated in Volume II of the Manual on Codes under national coding procedures.