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squirrelitude ([personal profile] squirrelitude) wrote in [community profile] davis_square2023-07-22 07:42 am
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Rainfall history?

I've found it surprisingly difficult to get good information on recent rainfall history for Somerville. Like... how much rain did we get in that storm yesterday? How about all of June? And what's the historical average for June? (Latter might need a different site.) Any tips?
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redbird: closeup of me drinking tea, in a friend's kitchen (Default)

Re: some current Somervillle numbers

[personal profile] redbird 2023-07-23 05:47 pm (UTC)(link)
Something weird is going on with one of those stations (KSOMER81). If I use the KSOMER89 station, scroll down, and pick "monthly mode," it shows me a plausible-seeming number of 7.19 inches so far this month, rather than the much lower number from KSOMER81.
squirrelitude: (Default)

Re: some current Somervillle numbers

[personal profile] squirrelitude 2023-07-23 06:07 pm (UTC)(link)
Ah, OK -- so the "average" is the total for the month, once you're in monthly mode! That makes sense now that I understand it. :-P Cool!

The precipitation graph is still weird, and that's what I had been looking at:

Graph of precipitation over July, with green line marking precipitation rate in mm, and blue line marking precipitation accumulation total. The green line is spiky, and the blue line appears to increase and then drop.

I think the accumulation line is resetting at the day boundary, which is weird but would explain it. Maybe I'll send them a bug report asking for that graph to accumulate for the whole month when in monthly mode...
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