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Dryspell incorrect?

Discussion and questions about Cumulus weather station software version 1. This section is the main place to get help with Cumulus 1 software developed by Steve Loft that ceased development in November 2014.
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41south
Posts: 70
Joined: Mon 04 Apr 2011 11:35 pm
Weather Station: 1-wire Windblown solution
Operating System: Win XP
Location: Wellington, NZ
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Dryspell incorrect?

Post by 41south »

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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beteljuice
Posts: 3292
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Weather Station: None !
Operating System: W10 - Threadripper 16core, etc
Location: Dudley, West Midlands, UK

Re: Dryspell incorrect?

Post by beteljuice »

I think it's because 'Today' hasn't ended yet - did it rain 'Yesterday' ?
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......................Imagine, what you will KNOW tomorrow !
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MickinMoulden
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Weather Station: WS-1081 with rain gauge mod
Operating System: Windows 7 & 1.9.3 b1059
Location: Palmerston, NT, Australia
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Re: Dryspell incorrect?

Post by MickinMoulden »

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.
Michael, Palmerston, NT Australia www.Palmerston-WeatherImageNo image? I'm offline!
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steve
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Re: Dryspell incorrect?

Post by steve »

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.
Steve
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