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 Post subject: Dryspell incorrect?
PostPosted: Tue Jan 10, 2012 3:37 am 
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Joined: Mon Apr 04, 2011 11:35 pm
Posts: 70
Location: Wellington, NZ
Weather Station: 1-wire Windblown solution
Operating System: Win XP
Just happened to look at my rain stats and saw this;

From the Today page:
Rainfall Rate Max 3.6 mm/hr at 14:31
High Hourly Rainfall 0.9 mm at 14:45
Current Wet Spell 0 days
Current Dry Spell 1 days

And from the Now page:
Rainfall rate 0.0 mm/hr Rainfall Today 1.2 mm
Rainfall Last Hour 0.3 mm Rainfall This Month 125.4 mm
Rainfall since midnight 1.2 mm Rainfall This Year 125.4 mm
Rainfall last 24h 1.2 mm Last rainfall 2012-01-10 16:04

My met day is 0900-0900, how is the current dry spell 1 day?

Cheers
Colin.

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 Post subject: Re: Dryspell incorrect?
PostPosted: Tue Jan 10, 2012 3:49 am 
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Joined: Tue Dec 09, 2008 1:37 pm
Posts: 1846
Location: Dudley, West Midlands, UK
Weather Station: None !
Operating System: XP SP3
I think it's because 'Today' hasn't ended yet - did it rain 'Yesterday' ?

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 Post subject: Re: Dryspell incorrect?
PostPosted: Tue Jan 10, 2012 6:17 am 
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Joined: Mon Dec 20, 2010 12:12 pm
Posts: 446
Location: Palmerston, NT, Australia
Weather Station: WS-1081 with rain gauge mod
Operating System: Windows 7 & 1.9.3 b1059
I use Javascript to over-ride this, and have it include "excluding today", which is what is happening in your case, and "includes today" when it registers rain. It calculates it when it creates the file at the end of the day ie.9am, and doesn't work off the data at hand.

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 Post subject: Re: Dryspell incorrect?
PostPosted: Tue Jan 10, 2012 8:59 am 
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Joined: Mon Jun 02, 2008 6:49 pm
Posts: 17567
Location: Sanday, Orkney
Weather Station: Davis VP2
Operating System: Windows Home Server 2011
beteljuice wrote:
I think it's because 'Today' hasn't ended yet - did it rain 'Yesterday' ?

I suspect that's the case, based on the information given.

While it's possible to say that today is a 'wet day' as soon as it rains, it's not possible to say that it's a 'dry day' until it's ended, so for consistency it calculates both wet and dry days at the end of the day.

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