If your database is metric then rain is in cm
If your database is metricwx then rain is mm

Your NOAA report is, according to the title line above the table, in mm - 
but the units are determined by the contents of the template and so can 
easily be changed to other units by changing the template appropriately.

http://weewx.com/docs/customizing.htm#units



On Thursday, 5 January 2017 00:19:57 UTC+2, [email protected] wrote:

> Hi,
>
> Le mercredi 4 janvier 2017 00:38:20 UTC+1, mwall a écrit :
>>
>> On Tuesday, January 3, 2017 at 5:47:04 PM UTC-5, lionel.sylvie wrote:
>>
>> This is the same corrections in the weewx.conf between versions.
>>> Where I can find the commits?
>>>
>>
>> the change to rain multiplier happened on 11 jun 2015:
>>
>>
>> https://github.com/weewx/weewx/commit/0bb7db1edc806caebe68357bc315ccf8674eea52
>>
>> so it has been part of the ws23xx driver for some time now.
>>
>> the divide-by-ten happens only to data from the logger, so if you are 
>> using record_generation=hardware you will definitely see a difference, but 
>> if you are using record_generation=software you will see a difference only 
>> when weewx has to do catchup.
>>
>>  I compare all the versions of the WS23xx I used since 2.7, all are 
> similar concerning the formula. The x10 in the commit above concern the 
> wind speed which is included after the 2.7 version.
>
> To come back to my original question, it's concern not the generated data 
> but the values shown in the NOAA files.
> In the file attached in this post NOAA of November, when we take the rain 
> value for the 24 November 2016, this is 24.9mm. When we take the value in 
> the database (weewx.sdb) for the same date ("1479942000" : Sat Nov 24 2016 
> 00:00:00 GMT+0100), the value is 2.486. Is it the same units?
> From a report of an official station close to mine (4-5kms), the cumul was 
> 11.2mm.
>
> http://www.infoclimat.fr/observations-meteo/archives/24/novembre/2016/saint-martin-d-heres/00014.html
>
> When I do the sum of the rain falls during this same day (data taken in 
> the archive table of weewx.sdb), I get 1.243 which is the half value form 
> the archive_day_rain. Is it normal ?
> When I sum all the rain data for November 2016 coming from the archive (= 
> 8.029) and compare to the sum of the archive_day_rain for November 
> (=16.058) and the NOAA of November (=160.6mm), I get a double value for the 
> archive_day_rain and NOAA. Is there any issue during the calculation of the 
> archive  ?
>
> rds
> Lio
> PS : After these all analysis, the archive_day_rain is in cm and the NOAA 
> is in mm. True? then I get the explanation for the x10 between values of 
> archive_day_rain and NOAA.
>
>

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