I think barometer requires the temperature from 12 hrs previous - sadly your graphs do not show the temperature 12 hours before the notch!!
On Tuesday, 19 March 2019 00:19:52 UTC+2, Louis De Lange wrote: > > In my BYO station I noticed strange notches in the barometer graph that I > cannot explain > > Since barometer is calculated by weewx in this case I am trying to > understand the cause, I cannot imagine that the formula for calculating > barometer from pressure will cause this. If anyone has any idea what the > cause might be I would appreciate some insight. Below is a screen grab of > the barometer and altimeter plot. Note the altimeter is smooth when the > big downward notch is evident in the barometer plot, starting around 1am. > Since barometer depends on temperature I also include the outTemp plot for > comparison. At the time there was no sudden change in temperature that > could affect barometer. > > Note that I am on Weewx 3.8.2 with Interceptor Driver. As the station is > BYO, all derived variables are calculated - the station only reports > pressure and weewx calculates altimeter and barometer. > > [image: barometer.JPG] > > [image: outtemp.JPG] > > > > -- 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]. For more options, visit https://groups.google.com/d/optout.
