My Cumulus "Longest Dry Period" ended at 31 days, when we had 0.6mm on the 21st July. However whilst listening to a BBC weather man on Radio 4 talk about some areas experiencing 45+ days continuious days of no rain, he said that rain less than 1mm does not officially count! I was very suprised. Did i hear that right ? I would be on 46 days if the brief shower was excluded....
This seems to suggest,if true, that the Cumulus Software defintion of "Dry Run" or the default "RainDayThreshold" might not be quite right perhaps.
This is not a complaint and I don't have an issue; it works as I expect and want. Perhaps you are aware or not, either way, I just thought I would throw this up here out of curiosity.
Best Wishes.
pp
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Cumulus MX V4 beta test release 4.0.0 (build 4018) - 28 March 2024
Legacy Cumulus 1 release v1.9.4 (build 1099) - 28 November 2014 (a patch is available for 1.9.4 build 1099 that extends the date range of drop-down menus to 2030)
Download the Software (Cumulus MX / Cumulus 1 and other related items) from the Wiki
Longest Dry Run curiosity
- steve
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Re: Longest Dry Run curiosity
I'm pretty sure that the Cumulus default of 0.2mm corresponds to the official definition of a dry day as defined by the Met Office and/or the WMO, or at least it did at the time I wrote the code. See this page, for example: https://www.metoffice.gov.uk/climatecha ... daily.html
Perhaps the definition has changed. But 1mm is quite a lot of rain, I don't think I would regard that as a dry day myself.
Perhaps the definition has changed. But 1mm is quite a lot of rain, I don't think I would regard that as a dry day myself.
Steve
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Re: Longest Dry Run curiosity
note just me then have the same thing min say 12 off may last time we hade rain but it saying Days Since Last Dry Day 44 Days but it ment to be over 60 days now
- steve
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Re: Longest Dry Run curiosity
This is nothing whatsoever to do with that.dazza1223 wrote:note just me then have the same thing min say 12 off may last time we hade rain but it saying Days Since Last Dry Day 44 Days but it ment to be over 60 days now
Steve
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Re: Longest Dry Run curiosity
I agree. That's 0.04" in old money. I set the trigger at 0.01" as I can get quite a few days with dew recorded.steve wrote:But 1mm is quite a lot of rain, I don't think I would regard that as a dry day myself.
- dazza1223
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Re: Longest Dry Run curiosity
o sorry my bad i just re read it sorry steve