How many miles an hour wind force is?

Question

i mean if say tomorows wind is 21 miles an hour witch is what its sopposed to be here , how many force is that , i know when white water first starts to appear on the sea its force 4 but how many miles an hour is the wind going , this is one for you schoopy , seeing as your super intelligent lol

Answer 1

19/24 miles an hour would be  5.  Aren't I clever hehe, no I just looked it up in wikipedia. hehehe

Answer 2

Google 'Beaufort Scale'

21m.p.h. will be Force 5

Mean wind speed of a force 4 is 15m.p.h.