I was looking at the clouds at KSFO today and noticed that the clouds were 
moving towards the wind as indicated by the windsock. Windsock pointed 
towards 80 deg and clouds were moving towards 260 deg.

I checked the "environment" subtree in the property browser, and sure enough 
the wind was coming from 260 deg, so the sock was pointing in the right 
direction. I also checked the "weather conditions" GUI window to make sure 
that the wind wasn't actually blowing the other way at the cloud layer 
altitude (it wasn't!).

I checked the indicated airspeed, while parked heading towards the wind, 260 
deg. It indicated 18 knots, the same as the "wind-speed-kt" property under 
"environment". That made sense.

It seems that the cloud layer is mowing in the wrong direction. After changing 
the wind direction and updating the cloud layer, they were stil moving 
directly opposite of what one might expect.

-- 
Roy Vegard Ovesen


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