My tempest station #3853 has stopped reading the wind. The Santa Anna’s are blowing here. It’s ENE 12G26 according to my Davis. Tempest is showing zero. Visual inspection indicates no problems.
You have a SKY and AIR device, and it is your SKY which is acting strange. Of the SKY devices I’ve had, IIRC, when they failed one of the symptoms was similar to what you are seeing. The sensor status sometimes shows good, as yours did when I just checked. You might want to open up a support ticket (link above in the menu).
There are no more SKY devices available, so if you need to replace your SKY it will have to be replaced with a Tempest device. Unfortunately, the Replace Device option does not work when changing device types. This means that the historical data from your SKY will not follow to a Tempest. You can, however, keep the AIR connected to your station, giving you two locations for temperature: AIR and Tempest. The firmware on the Tempest appears to be relatively stable so you shouldn’t have to get a new hub with a replacement. The old hubs which came with the SKY + AIR do not have the ability to update firmware in a sensor.
If you don’t delete the SKY from your account, the data will stay visible to you. As long as you don’t change the hub, you can keep your station ID. The Station ID is the “device ID” of the hub and there is no way to transfer it to a new hub.
When you get your Tempest and have it setup, ask support to mark it as the primary device.