Intelligent alerts

An intelligent alert is a conditional rule on an airport: 'notify me if wind exceeds 25 kt at LIRF, expires in 6 hours'. The backend evaluates the rule on every METAR cycle (5 min) and notifies only on the false→true edge — no spam when weather stays bad.

Condition types

• Wind ≥ X kt (sustained)
• Gust ≥ X kt
• Visibility < X km
• Ceiling < X ft
• Temperature < or > X °C
• Flight category ≠ X (e.g. 'notify if leaves VFR')
• Any weather phenomenon (TS, FG, RA, SN, …)

Edge-triggered

A rule fires once when the condition transitions from false to true. If wind stays above 25 kt for 4 hours you don't get 4 hours of notifications — just one. When wind drops below and then exceeds the threshold again, you get a second notification.

Expiry

Every rule has a duration: 1h, 3h, 6h or 12h. It auto-disables at expiry. You can edit or delete it manually before then.