Update - our field finally dried out enough to support a ladder, and it was sunny and above freezing today, so I got out and fixed the bird ring. I’m not at all surprised it slipped down. I put a drop of superglue between the ring and the unit at 4 points and we’ll see if that holds it.
At least as of now, it’s tracking very well against my Acurite 5-n-1.
We’re scheduled for some wind and rain in next few days - we’ll see.
SuperGlue tends to be permanent. My experience with SuperGlue is. . .once applied. . .it’s there for all of eternity! (i.e. it’s more than extremely difficult to separate the two glued items). I have the Bird Deterrent spikes (WF-BDA01) on my WF-SKY01 (the predecessor of Tempest). Never had a problem with the silicone ring pushing down. . .but if it ever did. . .I’d probly use a very very thin strip of double-sided tape to hold it in place.
That is because the sides of the cap on the SKY are vertical whereas on the Tempest they taper in from the top. For holding the BDA, it is an unfortunate change.