If a speed of a storm is said to be so many knots, what does that mean in mph?

Question

Like, if a storm is moving at 20 knots, how many mph is that?

Answer 1

1 international knot = 1.1507794 miles per hour

Therefore a storm moving 20 knots per hour would be moving:

20 knots X 1.1507794  =  23.015588  miles/hr

Answer 2

One knot (which is one nautical mile per hour) is equivalent to 1.15 statute miles per hour.  Thus 20 knots is 23 statute miles per hour.  A statute mile is what we commonly refer to on land.

Answer 3

Flor your the teach....i dunno