The station is a AW 2902A
What I meant is that after I see that logged, rain amount for the day never 
reaches the amount recorded by the console.

>From your explanation, this seems to be the correct way for weewx with this 
station.


On Sunday, August 19, 2018 at 10:45:29 AM UTC-4, mwall wrote:
>
>
>
> On Monday, August 13, 2018 at 4:30:43 PM UTC-4, G Hammer wrote:
>>
>> I have been having fairly steady rain here and see this come up in the 
>> logs.
>> Aug 13 15:48:32 PlexSrv weewx[14290]: interceptor: MainThread: skipping 
>> rain measurement of 0.03: no last rain
>>
>> Once this happens, the rain total is off for further periods.
>> For example, once I saw the 0.03 skipped entry here, the rainfall amount 
>> stayed at 0.03
>> Ambient and WU both have a higher amount recorded.
>>
>> I'll look at this again later as another rain shower hits and see if the 
>> total changes and is correct compared to Ambient and WU.
>>
>
> what kind of weather station is this?
>
> do you ever see this other than when weewx starts up?
>
> please be more specific about "the rain total is off for further periods".
>
> the rain values in weewx are delta measurements, but most hardware reports 
> rain totals.  so any driver must have two data points before it can report 
> a value for rain delta.
>
> the message "skipping rain measurement...: no last rain" indicates that 
> the driver got a non-zero value for the rain total, but since it had no 
> previous value it cannot calculate a rain delta.
>
> the message lets you know that some rain data might have been missed.
>
> (btw, one utility function that might be useful for driver developers 
> would be to get the last rain total from the database, if one exists.  then 
> we could use that value instead of just saying "no last value".  almost 
> every driver has to deal with this for rain or any other delta 
> observations.)
>
> if the weewx rain totals do not agree with a canonical reference, you can 
> fix your rain counts by manually adding values to the weewx database
>
> m
>

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