What It Tells You
The field forecast is the week ahead for that field: temperature, humidity, wind and rain. The spray, nitrogen and drought models read it. The forecast on screen is the forecast behind the windows. The frost banner appears when frost is likely on one of the next three nights. It shows the night and the effective minimum. The minimum is adjusted for how far the field sits below the farm’s mean elevation, because cold air drains into the low fields first. The frost risk is computed by the Spray Window model. The card opens on rain, because that is what it is opened for: the forecast’s next 24 hours beside the nearest real gauge’s last 24 hours, each as a figure, one labelled forecast and the other measured with the gauge’s name and distance. Temperature follows, with the night’s low. Gauges come from the Environment Agency in England and Wales and from SEPA in Scotland; Northern Ireland has no public rainfall feed yet. On Today the weather tile shows the largest field’s temperature and the day’s rain.How It Works
The forecast is refreshed every four hours from a gridded weather model and cached per field. Frost risk is high at an effective minimum at or below 0 °C and low at or below 2 °C. A high risk raises an advisory and a notification once in 24 hours.
The week's forecast with a frost banner, and cold air draining into the low field.