Hi nincehelser, good catch. I have not been watching the barometer, waiting for Bloom Sky and/or WU to give us an elevation adjustment capability (possibly in the works). Mostly I have been hoping WU won't toss us off the map because the uncorrected baro is so far off. Or, worse yet, factor a Bloom Sky barometer into WU quality control or averages.
I think I might have temperature issues too (Bloom Sky too warm by a few degrees in sun light), but have not studied them yet. It is a wonderful sky camera.
I went to check mine. The Bloom Sky phone app stopped working (maybe you got someone working on the problem). It is now erratic, sometimes closing itself, and showing infinite update with no data or picture. Also, now the data portal says 502 Bad Gateway nginx. I hope I didn't get booted
My WU Bloom Sky barometer says 29.74, which agrees with the graph (the data looks hours incomplete).
My Bloom Sky web page is still working and says 1028 (30.36)
My RainWise AgroMet (+0.59 altitude corrected) reads 30.13 (equiv. to 29.54 uncorrected). The RainWise follows the local AirForce Base as best as I can tell. They went over to most civilian operations and only report hourly, with delayed reports. I need to study the comparison over a few days when the barometer is reasonably steady. However, I am getting very good QA reports at CWOP, just tuned from +0.58 to +0.59 earlier today as an experiment to very slightly slew in closer on my QA plot if possible.
So, looks like some problems to be sorted out on the Bloom Sky barometer readings.