Today / Yesterday Time Hourly Rain Webtag

[captzero]

I'm using <#ThourlyrainTH> to display the time for todays highest hourly rain and although there hasnt been any rain recorded (sunny and fine all day) it returns a value of 16:49. Yesterdays webtag returns 18:04. If no rain has been recorded shouldn't the values be 00:00 or am I reading / using them wrong.

Thanks

[daj]

I've checked my tags and they are correct. ThourlyrainTH is showing 00:00 today and 17:30 for yesterday which is correct based on other data

What version/build of Cumulus are you running?

[steve]

Yes, they should show 00:00 if no rain at all has been recorded. It might be down to rounding errors, particularly if you stopped and started Cumulus at all. Does Cumulus itself show the same values in View | Highs and lows | Today (and Yesterday)? If you zip up the diags folder and attach it, I'll see if I can see what's going on.

[captzero]

Thanks David / Steve.

I did shutdown and restart the computer for a windows update this afternoon. Also had a 'failed to initialize station' error after the update and had to reconfigure the station settings in Cumulus.

Diags attached. Screen shot attached for todays data. Yesterdays shows 6:04PM. Using Cumulus v1.9.1 (989)

Thanks in advance.

[steve]

It seems to be down to rounding errors in the way the same rain total is stored by Cumulus (in today.ini) and the VP2. Cumulus has:

12/05/2011 16:49:25.538 : Setting uncalibrated raintotal = 748.600036621094

And the VP2 has

12/05/2011 16:49:55.692 : VP2: Setting raintotal from current station value: 748.599975585938

which are the same number really. So subtracting them gives a non-zero value (= rain) but it difference rounds to zero.

Did your 'last time it rained' timestamp change? I think I may have done a properly rounded calculation on that one.

[captzero]

Thanks for that.
Last rain was at 2:36 am 10 May 11 which seems about right. (0.2mm, 1 tip in the bucket therefore no rain rate).

It's not a biggie. I was modifying my Records and Extremes page and noticed the time stamps.

[steve]

Last rain was at 2:36 am 10 May 11 which seems about right.

I should do the same check on the hourly rain that I do for that, so the timestamp doesn't change unnecessarily.