There's a very strong wind today.
'Fortissimo' — for-TIS-si-mo. The superlative of 'forte'. Four syllables, double 's', stress on the second.
Use on very windy days — common along Italian coasts and in mountainous regions. Wind in Italy is often associated with named winds like Tramontane, Scirocco, and Mistral.
'Fortissimo' is the absolute superlative of 'forte' (strong) — meaning 'very strong'. In Italian weather, absolute superlatives are very common because weather descriptions tend to be expressive. 'Un vento fortissimo' is more colourful than 'un vento molto forte'.
Il vento mi spazza via!
The wind is blowing me away!
Vivid and hyperbolic — 'spazzare via' (to sweep away) is very Italian
Tira una tramontana gelida.
There's an icy tramontane wind.
'Tramontana' is a specific cold northerly wind — known throughout Italy
Che ventaccio!
What a terrible wind!
Pejorative '-accio' suffix applied to wind — mirrors 'tempaccio' construction
Italy has several famous named winds: the 'Tramontana' (cold northerly), the 'Scirocco' (hot southerly from Africa bringing sand and humidity), and the 'Bora' (fierce northeasterly around Trieste). These winds have distinct personalities in regional culture.