As far as I understand it, SKY and Tempest run the wind RAW data through a quality control filter that is processed in real-time before being sent to the HUB. Next, the HUB runs that data through another quality control filter before the data is finally sent to the WeatherFlow servers. SKY and Tempest were designed to get smarter as time goes on from processing this data to stop this type of problem. The key is “get smarter” which tells me it is basically like a form of Continuous Learning Algorithm.
Sometimes this bad data gets through and we see it in the graphs. All we can do right now is try and catch it ourselves and get the water droplets off the affected areas to help fix the bad data. Hopefully, WeatherFlow can one day have these filters block it entirely. This is one reason why all three of my weather stations are easy to reach. You never know when you might have to climb the ladder.
Today after a feeder band of rain from Delta passed by, I had to wipe the droplets off around the wind gap area. The winds were reading NW when they were actually from the SE plus wind gust were higher. After wiping the droplets away the speed and direction returned to normal. See the graph below where you can clearly see when I wiped the droplets away.