Did a quick look for the Tempest, and it seems very appropriate that the smartphone is displaying a temperature of 80 degrees.
The ultrasonic wind sensor is wonderful when there is no snow, no ice, no birds and no insects which like to build in these precision cavities.
I have a couple of used Vaisala WXT units which are amazing when there is no snow. Even with heaters (not melters as I'd like) to try to keep them clear, any accumulation of snow on the domes really makes the reported wind info go bonkers, and makes them impractical for anywhere above the freezing/snow line in this continent for 24 hour, all year round sensing. Even old reliable cup anemometers and the RM Young/rainwise propellers get clogged up with really heavy stuff, but those are off line for short periods of time in most cases (thank goodness for the trees' sake we've not had coatings of clear ice in years).
I think we'll see these interesting ultrasonics be of limited implementation, but maybe someone will come up with a solution.