Bad Wind
This is a graph from our davis vantage vue (2012 Dec) and Weather Station Software: Wunderground v.1.15 from the last day of high winds with high gusts.
Note that the gusts all hit a hard ceiling of approx 29kph.
We can tell you the windspeed went higher than that. The data is wrong and we suspect the windspeed sensor on the Davis Unit.
We can also compare it to our older but still functioning Oregon WMR968 Wireless Weather Station, which confirms our thoughts.
You would think that this more modern unit would have been engineered correctly from the start.
.
Now we have to start a long troubleshooting and repair process and mark all top wind speed data from 2012 December 26 to be incomplete and or wrong.
From the
Vantage Vue Integrated Sensor Suite Manual – Davis Instruments …
“The wind cups don’t spin or don’t spin as fast as they should.”
The anemometer may be located where wind is blocked by something, or there may be friction interfering with the cups’ rotation. Remove the wind cups by loosening the set screw, and clear out any insects or debris which may be interfering with the cup rotation. Turn the shaft the cups rotate on. If it feels gritty or stiff, contact Davis Technical Support. Note: Do not lubricate the shaft or bearings in any way.
ANEMOMETER
Vantage Vue records wind speeds as low as 2 mph (3 km/h) and as high as 180 mph (290 km/h).