Dust storms can move at a wide range of speeds, depending on several factors like:

* Wind speed: Stronger winds drive faster storms.

* Terrain: Rough terrain can slow down the storm, while flat areas allow it to move quickly.

* Atmospheric conditions: Temperature inversions and other atmospheric conditions can influence the speed of the storm.

Generally, dust storms can move:

* Slow: A few miles per hour

* Average: 15-30 miles per hour

* Fast: Up to 50 miles per hour or more, especially in strong winds.

Here's an example:

* The "Haboob" dust storms in Arizona can travel at speeds of 40-50 miles per hour.

It's important to note that dust storms can change speed and direction quickly, making them unpredictable and potentially dangerous.