The colour coding makes it easier (for me) to spot the days with rogue data 
although sorting the data by (say) windspeed is another say to find it and 
yes, I realise what I need to do to find the values.  I put the spreadsheet 
up to show people what I was seeing.

My question was if this is a sign of sensors reaching the end of their 
life, given most of the rogue values have occurred since the start of March 
this year.



On Friday, 14 April 2017 10:02:52 UTC+1, Andrew Milner wrote:

> What you need to do is to use the NOAA data to possibly pinpoint a rogue 
> day, and then check the archive table to see if there is a single rogue 
> record.
>
> If there is then you can just correct the rogue record or delete it even, 
> and rebuild the stats tables and noaa files if required.
>
> You should check the log at around the time the rogue record or recoprds 
> were inserted into the database and see if there were issues recorded in 
> the log.  Maybe you have a comms problem.
>
> I could not tell what we were supposed to deduce from the colour coded 
> noaa data - since there were so many colours in use!!
>
>
>
> On Friday, 14 April 2017 11:19:15 UTC+3, Auchtermuchty Weather wrote:
>
>> Have picked up my NOAA data into excel, and find that nearly all my 'bad' 
>> values are since 1st March this year.  It was December 2016 when I replaced 
>> the Pi with a better one with the then up-to-date version of Weewx.
>>
>> XLXS file attached - I have colour coded the values in each appropriate 
>> column.
>>
>> Makes me think I do have a sensor problem or problems.  :(
>>  
>>
>> On Wednesday, 12 April 2017 09:20:06 UTC+1, Auchtermuchty Weather wrote:
>>
>>> I am getting the odd spike in my readings, for example:
>>>
>>>
>>>                    TEMPERATURE (C), RAIN (mm), WIND SPEED (knots)
>>>
>>>                                          HEAT   COOL         AVG
>>>       MEAN                               DEG    DEG          
>>> WIND                   DOM
>>> DAY   TEMP   HIGH   TIME    LOW   TIME   DAYS   DAYS   RAIN  SPEED   
>>> HIGH   TIME    DIR
>>>
>>> ---------------------------------------------------------------------------------------
>>> 01    3.5   13.1  11:12   -1.1  04:31   14.8    0.0    0.0    0.4    
>>> 6.0  07:19     22
>>> 02    4.3   13.4  05:56   -0.7  00:02   14.0    0.0  148.8    1.8   
>>> 44.9  05:56     25
>>> 03    4.3   11.9  11:31   -2.3  07:56   14.0    0.0    5.1    0.7    
>>> 8.6  22:43    191
>>> 04    5.2    6.7  15:30    4.0  08:30   13.2    0.0    9.9    0.7   
>>> 12.6  09:50    207
>>> 05    5.6   10.3  15:25   -0.2  23:51   12.7    0.0    3.6    0.0    
>>> 3.3  07:37    108
>>> 06    5.2   16.7  14:55   -0.3  01:18   13.1    0.0    1.2    0.1   
>>> 43.5  15:34    130
>>> 07    5.1   12.4  11:19  -15.1  08:56   13.2    0.0  807.9    0.4    
>>> 8.0  16:15     77
>>> 08    7.3   13.3  11:31    4.8  07:30   11.0    0.0    2.4    1.7   
>>> 19.2  11:44    360
>>> 09    8.0   14.3  14:26    2.7  23:51   10.3    0.0  271.8    1.2   
>>> 11.9  08:48    345
>>> 10    6.0   10.2  16:02    1.2  02:30   12.4    0.0   76.8    0.1   
>>> 26.4  07:35    249
>>> 11   10.2   16.3  14:02  -38.0  15:32    8.1    0.0  625.5    0.6  
>>> 128.9  06:15     29
>>>
>>>
>>> There is no way there has been a wind speed of 128.9 knots!
>>>
>>> I can't remember how to fix these, nor can I remember if there is a 
>>> setup somewhere to reject readings outside the parameters.
>>>
>>>

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