Hi Gary. Thanks again for this report. We have taken a look at your wind data, comparing the SKY to your Acurite for the same time period (roughly the past 10 days). Here are plots of average and gust wind speed, SKY in orange and AcuRite in blue:
As you can see, there’s pretty darn good agreement! If anything, the SKY reads higher gusts.
So, we’re not sure where you’re seeing the big negative % differences, but one theory is that you may be comparing the data at different time scales. On the graphs in the smart weather app, the time scale changes as you zoom in and out. Data is reduced or “bucketed” (explained more here: Data archive buckets explained). To compare apples to apples, be sure you’re comparing similar time scales. That probably means looking at the one-minute zoom level (you could also download the raw observations via the API or one of the third-party tools that uses it).
Does that make sense? If it still seems like your SKY is underestimating wind speed, please share more details about the specific dates and time periods and how you’re determining the % differences. The more data the better.
Thanks again!