That's generally true, but it's important to remember that a hurricane's forward speed can vary quite a bit. Here's why:

* Average speed: You're right, the average forward speed of hurricanes is indeed around 10-15 mph.

* Range of speeds: Hurricanes can move as slow as 1-2 mph or as fast as 30 mph or more.

* Factors influencing speed: Several factors influence a hurricane's speed, including:

* Steering currents: Winds in the upper atmosphere direct hurricanes.

* Location: Hurricanes in the Atlantic can move slower than those in the Pacific.

* Strength: Stronger hurricanes tend to move faster.

So, while 10-15 mph is a common average, a hurricane's speed can be much faster or slower.