The reports are generated each archive interval so yes fairly frequently. The problem is the process that generates the reports generates from the last generated report to the current time, it doesn't 'fill in the gaps'. So when you first did the import weeWX would have generated the early 2013 reports, presumably weeWX also generated a January 2018 and 2018 report. So the next import added the later 2013 data but because of the way the reports are generated the corresponding month and year reports were not generated.
Rule of thumb when NOAA reports or plots don't show historical data is to delete all NOAA reports and plots and let them be regenerated during the next report cycle. If the data is indeed in the archive this fixes the majority of issues. Gary -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.