Welcome to the Cumulus Support forum.

Latest Cumulus MX release 3.9.5 (build 3100) - 14 January 2021 (please see announcement regarding releases since 3.5.0)
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 the NOAA report and Snow Index drop-down menus to 2030)

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For New Users

Discussion of the Cumulusutils tool and website generator.

Moderator: HansR

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Posts: 1651
Joined: Sat 20 Oct 2012 6:53 am
Weather Station: Davis Vantage Pro 2+
Operating System: Raspbian GNU/Linux 10 (Buster)
Location: Wagenborgen (NL)

Re: For New Users

Post by HansR »

liddelljs wrote:
Tue 22 Dec 2020 11:33 am
I'm assuming the predicted wind comes from the yourweather url for my chosen location. Is that correct?
Yes that is correct.

And it is also correct to assume that predictions don't represent the actual observed weather parameter.
But this seems a systematic underestimation of 30-40%. That can occur one day, maybe two but not in such long row.

So you could start by observing the prediction (-2 days) versus the observation (of high average windspeed) on the actual day. And maybe compare this to an official measurement close by, possibly a handheld equipment to calibrate yourself. Wind does constitute a significant part of pwsFWI when temperature and dryness are such that wood (litter and undergrowth in general) becomes easily ignitable.
https://meteo-wagenborgen.nl / Cumulus 3.9.4 (build: 3099)
Davis Vantage Pro 2+ / Raspberry Pi 3 Model B Plus Rev 1.3
Raspbian Buster / 5.4.79-v7+ armv7l
Mono JIT compiler version (Debian Sat Apr 20 05:16:08 UTC 2019)

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