I’ve read through the various pinned threads on CL, and I’ve done some searching but I still have a few questions.
The short version is simply how long should I wait before I report what I think are calibration issues? The CL threads indicate they run every day and in a couple of the threads they say if there’s an issue after a day or two to notify them. I know the WeatherFlow folks are swamped with all the new Tempest users, so I don’t want to needlessly bug them if the answer is “wait longer”. But I also don’t want to wait too long either, since this data is being broadcast into CWOP and various other places, and local paragliders, surfers and others are using my weather station (in conjunction with my webcams) to get an idea of conditions.
I’m also wondering if data from my two previous Tempests are being used in the calibration for this one. I did the “replace device” so that it would keep data. But now I’m wondering if data from those two failing Tempests might be impacting the calibration of this one? Or is it tracking the deviceId and only calibrating using data from that deviceId?
I put the latest replacement into service on 10/10 around 4pm PDT so it’s been up about 3 days now, and we’ve had some remarkably clear skies during that period.
My temperature seems to be reporting low, but only during the day. At night it seems to be pretty close to “accurate” (best I can tell). But the daytime temperatures are registering a fair bit lower than any neighboring site, and I’ve tried to double-check it with several different temperature gauges by bringing them up near the tempest (but put in the shade). It seems like it’s at least 8-10degF low at the peak of the day (at least on sunny days …). MesoWest has flagged my temperature data as “Caution” the past couple days:
And you can see that temperature is causing the problem when looking at the data quality graph (they flag temps with differences over 15):
The barometer is also reading a bit high - roughly 0.1mmHg as best I can tell based on various readings in the area.
The solar radiation is also reading higher than any station around me. And I don’t know where the Belcher skin gets its “theoretical max” values, but I’ve been well above what it reports as the theoretical max:
My humidity also has been reading well higher than any neighboring sites - anywhere from 20-40% higher. Now of course my location is a bit different than my neighboring sites, as I’m just 70 yards or so from the ocean - most of the other stations are further inland. That definitely has an impact on temperature and humidity. Though I’ve also looked at stations up-and-down the coast which are almost as close to the water, and my numbers are still a bit off compared to those stations.