Rain Rate Calculation (Websocket API)

The obs_st packet has a “rain_accumulated” value. What is it? The tempest reports rain intensity in their app. How can I know/calculate rain rate using the websocket API?

The rain_accumulated field is the amount of rain that has fallen in the previous minute in millimetres. The rain rate is calculated by extrapolating this value to an hourly rate. The formula is available here:


Thanks! That’s a very helpful datum.