Hang on. The bad data goes back more than a year? That sounds like a lot more than a re-siting problem.
It could be that your Peet station has been emitting bad data. On the Peet Brother stations, rain is calculated as the difference in field "rain_total". For example, if the sensor has seen 0.23" of rain for the day, then with the next LOOP packet it goes to 0.25", then WeeWX records rain as 0.02" --- the amount of rain that must have fallen between LOOP packets. It is possible that instead of rain_total increasing monotonically, it is going backwards, resulting in the large negative numbers you are seeing. Set debug=1, then restart weewx. Let it run long enough to record a bad rain value. Record the time of the bad value in your notes, then post the log. Setting debug=1 will cause the driver to record the raw values coming off the station. If it takes a while to encounter a bad value the log will be voluminous, so you may want to upload it to pastebin.com or similar site. -tk On Thu, May 7, 2026 at 2:27 PM Steve2Q <[email protected]> wrote: > Dave; one question before I delve into this. The bad data extends back as > far a one year (and maybe beyond). Will the clean up bad data procedure > take care of it all? > > On Thursday, May 7, 2026 at 2:01:02 PM UTC-4 Tom Keffer wrote: > > Looks like you got some bad data in your database. See the wiki article > *Cleaning > up old bad data > <https://github.com/weewx/weewx/wiki/Cleaning-up-old-bad-data>*. Its > instructions are oriented towards V5.x, but you should be able to figure it > out. The biggest difference is that you will use `wee_database` instead of > `weectl database`. > > On Thu, May 7, 2026 at 10:39 AM Steve2Q <[email protected]> wrote: > > Hello. I have not had a problem in quite a long time, but something > cropped up, and I'm not sure where to start. > > I have a Peet Bros station, and am running Weewx V 3.8.2. I found it does > everything I want, so I never saw the point in upgrading. Anyway, this is > the problem. > > I had to relocate my rain sensor. After starting up, I see that the graph > for rain looks like the attached screen shot. Several years ago, I add the > "Rain 2 minutes" the chart, and it worked fine until yesterday. Before > relocating the rain sensor, I stopped Weewx and turned off the RPi that is > running the program. When I started back up, the chart looks like this with > the - rates. I don't know if a file got corrupted or where to start > looking, I would appreciate any insight into what may be going on. Thanks > in advance. > > > -- > 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 [email protected]. > To view this discussion visit > https://groups.google.com/d/msgid/weewx-user/dd37cabc-43c7-4be2-8c42-f54619eb994en%40googlegroups.com > <https://groups.google.com/d/msgid/weewx-user/dd37cabc-43c7-4be2-8c42-f54619eb994en%40googlegroups.com?utm_medium=email&utm_source=footer> > . > > -- 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 [email protected]. To view this discussion visit https://groups.google.com/d/msgid/weewx-user/CAPq0zED22XbRTBebQ8LmcfvUUjGRyOjHVypsL5P6tTvLvw07HQ%40mail.gmail.com.
