It’s foggy outside and there is no wind at all. But my Sky gives constant windspeed of about 2 to 4 km/h.
Surrounding stations also give zero windspeed.
Sometimes strange peak gusts.
Don’t think that this is how its supposed to be.
No components that are out of line.
Could be condensing on the sonic sensors. Water on them is known to cause errors in wind readings, even to the point of reporting wind when there is none.
But, your surrounding stations probably have spinning cups and can not measure low wind.
As an example, have a look at these two stations. They are both mine and are within 30ft of each other. The first is an Ambient clone with spinning cups, the second is Weatherflow Sky. I’m not saying you may not have a problem, but this illustrates that what you are experiencing is possible.
That’s indeed a big difference.
But I meant the surrounding Sky stations.
Most of them gave zero windspeed.
Mine constantly gave windspeed. But could be my imagination that there wasn’t any wind
One new piece of information not mentioned above is that SKY needs a bit of clearance (at least 6 " / 15 cm) around the wind sampling area. Otherwise, you may see false wind from reflected interference.
So, to summarize, if your SKY says there’s wind when it seems calm to you, it could be:
SKY measures wind down to significantly lower speeds than spinning cup anemometers will so what seems like “no wind” may actually be “some wind”
you may have a large drop of water or something else (other than air) sitting on the reflective plate in the wind sampling area of your SKY
there’s some other solid object within 15 cm of the sampling area