Luc,

Some comments below.

Gary

On Monday, 23 March 2020 03:27:50 UTC+10, Lucas Heijst wrote:
>
> Gary,
>
> I completed a run from 2019-02-04 to 2019-03-01 and got 6957 records.
>
> The derived data went OK.
>
> 23 records had NULL for cloudbase, humidex and apptemp because outhumidity 
> was NULL (so far so good)
>

Doesn't surprise me, I never expect 100% data from WU for a number of 
reasons.


> 159 records had NULL for pressure and altimeter. Can't think of why. Which 
> values are needed for those calculations?
>

WeeWX field pressure requires outTemp (current and 12 hours ago), barometer, 
outHumidiy and station altitude. WeeWX field altimeter requires pressure 
and station altitude. I am guessing that one or more of outTemp (current or 
12 hours ago), barometer or outHumidity was missing in 159 of the imported 
records (or perhaps outTemp was missing in some existing records in the 12 
hours before the start time of your imported data) and that caused pressure 
to be left uncalculated. Then because there was no pressure altimeter was 
also left uncalculated. Should be easy enough to check with a few queries 
on the offending records. 
 

> Luc
>

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