Importing Daily Summaries into Weewx

[twcu...@gmail.com]

My weather station has been out of operation for an extended period of time, I would like to update my weewx database with the missing data. I have downloaded historical data from NOAA which only includes daily summaries of weather data, not regular observations during the day. My question is what is the best way to add daily summary data to the weewx databases? It doesn't appear that wee_import has this capability. Will I create a problem if I use sql to insert new rows to the Daily Summary Table?

[gjr80]

Hi,

You can certainly add data to the daily summary tables and provided your import met a couple of requirements (dateTime field needs to be Unix epoch timestamp for your local midnight time at the start of the day concerned and the additional data must use the same unit system as used by the database) WeeWX will use your manually added data with some caveats. Your are correct that wee_import does not import summary data, rather daily summary tables are updated once archive record data has been imported.

I don’t know what ‘historical data from NOAA’ is but if it is just max/min data for each day you will find some aggregates in reports will be populated, eg day max/min others will not eg day average, max/min times etc (average relies on sum and count fields in the daily summary table). Any aggregates that are not aggregated over a period of multiples of one day will not be populated as these do not use the daily summary tables. So you will likely find some aggregates in your reports will include the new data, others will not. As WeeWX plots are based on archive data none of your data will appear in any plots. The other issue is that any time the daily summaries are dropped or rebuilt in the future will result in all of your manually added data being lost.

Gary