|Automated weather station with cup |
and vane anemometer on top.
Photo: Walter Siegmund and Wikipedia Commons
|Windmill Anemometer. Courtesy NOAA/NSSL and Wikipedia Commons|
The warm storm last night, however, appears to have led to heavy riming and the failure of the wind sensor at Cardiff Peak. The tell-tale sign of riming is a rapid, unnatural drop in wind speed to zero, and this is what happened at Cardiff Peak between midnight and 1 am MST last night.
Given that the wind direction changes some after 1 AM, it could be that the cups or windmill are not rotating, but the vane is able to move some. Of course, there's also the possibility that the sensor was blown over, but I suspect this is unlikely.
At issue is if the rime will melt, restoring the instrument to normal operations, or if someone from Little Cottonwood Snow Safety team will need to go up and clean it off.