[gradsusr] What are the values of precipitation "apcpsfc" ?

[Alessandro Rossi]

Hi,
The precipitation values "apcpsfc" show the total rainfall accumulated in
the previous 3 hours?

eg:
http://nomads.ncep.noaa.gov:9090/dods/gfs_0p25/gfs20160303/gfs_0p25_00z.ascii?apcpsfc[0:20][538][46]

If I see the data of the run 00Z missing the first value it refers to the
hours 00Z second to rain from 00 to 03 the third from 03 to 06 or not?
Because it seems to me that there is an anomaly with accumulations expected
eg to 18z value it was 2.8mm but the gfs maps gave no rain accumulation in
3 hours prior to that point.

Thanks a lot for help
Alex
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://gradsusr.org/pipermail/gradsusr/attachments/20160303/ea80e5b5/attachment-0001.html