Did I lose some rain?

[Adrian Hudson]

It was raining this morning. Cumulus is set to reset at 0900UTC. It rained 0.4mm between 0850 and 0900. Here is my log:

23/12/13,08:50,9.7,93,8.6,6.3,17.0,191,1.0,3.6,997.70,820.6,22.1,40,6.3,6.8,9.7,0.0,5,0.46,622.86,5.0,19,0.0,175,0.0,1.2
23/12/13,09:00,9.7,94,8.8,5.8,14.8,193,2.2,0.0,997.33,821.0,21.7,41,6.3,6.9,9.7,0.0,7,0.46,622.86,5.4,34,0.0,164,0.0,1.6

Am I correct that Cumulus ignored that 0.4mm of rain?

[steve]

What makes you believe that it ignored it? According to your web site, Cumulus recorded 4.0 mm rain yesterday. Is that incorrect?

[Adrian Hudson]

Steve, sorry, no Cumulus didn't lose any. I use the log files in spreadsheets to calculate "stuff" (technical term, that one) and I was just trying to get my head round whether the rain so far counter would lose me rain - for example at the end of a month i.e. the end of the log file - if it was raining at the end of month.

I wasn't implying a bug - more a lacking in my brainpower.

[steve]

The 0900 entry is the first entry of the day rather than the last. The last rainfall entry of the day goes into dayfile.txt. Because of this, if you want to do stuff with the 'rain so far today' values in the log files, you would probably be better to use the 'total counter' (which on a Davis station is the annual total). In the entries you've quoted that's the figure that changes from 820.6 to 821.0.