[image: barometer]

Looks familiar!  Mine is from the week data.

- Paul VE1DX


On Monday, September 9, 2019 at 8:40:58 AM UTC-3, Bill Morrow wrote:
>
> Guess when the hurricane went through:
>
> [image: Screenshot from 2019-09-09 08-39-03.png]
>
>
> On Sunday, 8 September 2019 21:42:49 UTC-3, Bill Morrow wrote:
>>
>> Thanks for tip, Gary. I ran wee_config_database —drop-daily and saw this 
>> evidence in the log on weewxd startup:
>>
>> Sep  8 21:05:39 seal weewx[14232]: engine: Starting backfill of daily 
>> summaries
>> Sep  8 21:12:27 seal weewx[14232]: engine: Processed 1116765 records to 
>> backfill 1631 day summaries in 408.15 seconds
>>
>> but it did not pick up my new drastically lower pressure. Then I realized 
>> the statistics are actually on pressure, not the barometer reading. I might 
>> be putting the reading from my pressure sensor in the wrong field. Again, 
>> in the short term, I fabricated pressure readings by finding a suitable 
>> linear adjustment to convert barometer to pressure from nearby readings 
>> with both, and updated the archive table where pressure was NULL for the 
>> three emergency readings:
>>
>> update archive set pressure = 0.992657*barometer where dateTime between 
>> 1567895340 and 1567905540;
>>
>> Then dropped the summaries again, and restarted weewxd. The statistics 
>> page now shows my new all time low *pressure*. I wouldn't say science 
>> has marched on. That will have to wait for our next hurricane.
>>
>>
>> On Sunday, 8 September 2019 11:56:27 UTC-3, gjr80 wrote:
>>>
>>> Dropping the daily summaries is generally taken to mean using one of the 
>>> WeeWX utilities to drop the daily summaries rather than using SQL directly. 
>>> The current utility used to manage the database is wee_database; however, 
>>> in v3.1.0 the utility is wee_config_database. Try running 
>>> wee_config_database with the —drop-daily action (using —help will display 
>>> the list of available actions). 
>>>
>>> You can also use wee_config_database to rebuild the daily summaries 
>>> using the -backfill-daily action. 
>>>
>>> Gary
>>
>>

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