Define your own regions, pressure pairs and indicator conditions. Trends (Δ) detect föhn arriving.
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Tip — detecting föhn arrival:
Add a condition on a valley station (e.g. Interlaken) with
Field = Humidity, Δ = 2h, Operator <, Value = −10 to flag when humidity drops
more than 10 % in 2 hours. Pair it with a temperature trend (Δ2h > 2 °C) for confirmation.