I pericoli dei cambiamenti improvvisi del vento nei METAR.
È un cambiamento improvviso nella velocità أو direzione del vento. È molto pericoloso durante il decollo e l'atterraggio.
È indicato con il codice WS.
Esempio: ... WS RWY 05L.
I piloti eseguono una riattaccata (Go-Around) in caso di wind shear severo.
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