Re: High rain rate issue

bsudweather · Post by **bsudweather** » Fri 24 Jul 2015 3:41 am

My cumulus is reading a lot higher rain rate than my davis console. I had a heavy downpour today, and my cumulus got up to 5 something inches/hr while the console was reading like 3 something inches/hr. I just don't think it was raining that hard to begin with. But what should I do for these high rates?

Post by **steve** » Fri 24 Jul 2015 8:06 am

Cumulus gets the rate from the console, and it's hard to see how it could get it wrong (unless you have a calibration setting configured or have the wrong gauge type configured in the console). Because of the way it is calculated, it can achieve surprisingly high values for a very short burst of rain (over a period of just a few seconds), and the rate can change very quickly.

If you zip up the diags folder and attach it, I'll take a look.

bsudweather · Post by **bsudweather** » Fri 24 Jul 2015 4:42 pm

bsudweather wrote:My cumulus is reading a lot higher rain rate than my davis console. I had a heavy downpour today, and my cumulus got up to 5 something inches/hr while the console was reading like 3 something inches/hr. I just don't think it was raining that hard to begin with. But what should I do for these high rates?

I had some help over at WX and a guy told me to check my multiplier, I did and found I somehow had the rain multiplier set at 1.5" so that im sure was my problem. I reset it back to the .010 and will check next time we have some heavy rain. Thanks for the reply!

Post by **steve** » Fri 24 Jul 2015 7:39 pm

I thought that you must have set a calibration value, which is why I mentioned it and asked for the diags files which would have confirmed it. But you need to set the multiplier back to the default of 1 not 0.010. With 0.010 Cumulus is now recording rain at a hundredth of the value reported by the console. Clearing it is attempting to set it to zero, which doesn't make sense (you would never have any rain recorded), so the code sets it to a value that at least makes some kind of sense.

bsudweather · Post by **bsudweather** » Fri 24 Jul 2015 7:55 pm

bsudweather wrote:
bsudweather wrote:My cumulus is reading a lot higher rain rate than my davis console. I had a heavy downpour today, and my cumulus got up to 5 something inches/hr while the console was reading like 3 something inches/hr. I just don't think it was raining that hard to begin with. But what should I do for these high rates?
I had some help over at WX and a guy told me to check my multiplier, I did and found I somehow had the rain multiplier set at 1.5" so that im sure was my problem. I reset it back to the .010 and will check next time we have some heavy rain. Thanks for the reply!

Ok I will set it to 1, but when I cleared the 1.5" it automatically changed to .010 not 1 so I thought since it done that, that the 0.10 was default. But I will change it to 1. Thanks for the help!

bsudweather · Post by **bsudweather** » Fri 24 Jul 2015 7:56 pm

steve wrote:I thought that you must have set a calibration value, which is why I mentioned it and asked for the diags files which would have confirmed it. But you need to set the multiplier back to the default of 1 not 0.010. With 0.010 Cumulus is now recording rain at a hundredth of the value reported by the console. Clearing it is attempting to set it to zero, which doesn't make sense (you would never have any rain recorded), so the code sets it to a value that at least makes some kind of sense.

Ok I will set it to 1, but when I cleared the 1.5" it automatically changed to .010 not 1 so I thought since it done that, that the 0.10 was default. But I will change it to 1. Thanks for the help! Sorry I quoted wrong post above.