That's the problem with CoCoRaHS observations. I've been doing it since 2006, and it's a great way to keep IMBY records. However, when I take a 7AM reading, it records it for that day. The result is that if 2" of snow (or rain) falls on the last day of the month, it is actually recorded at on the first day of the next month. But at least we don't count it twice. lol
Anyway, to keep my personal records accurate, I have to make notes concerning such events, because I'm not getting up in the middle of the night to check my gauges.