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Earth's Rotation
The Earth rotates in a specific direction depending on how a viewer sees the planet. If a viewer saw the Earth from the North Pole, which corresponds to the Northern Hemisphere, the rotation would look counter-clockwise.
How Wind Works
When a low-pressure point is created, wind or air currents tend to flow toward the center of the low point. This is because the low pressure allows for more molecules to enter into the space. The wind will move in a direction that caters to its hemisphere. For wind to move toward the center in the Northern Hemisphere, the wind moves in an outwardly direction west and then an inwardly direction east, almost like circling a drain. This causes a counter-clockwise direction.
Coriolis Force
The Coriolis Force is the atmospheric pull toward the poles. Hence, atmosphere in the Northern Atmosphere is magnetically associated with the pull of the North Pole. This allows the equator to have the maximal force of magnetic and atmospheric pressure since it sits at the border of each pull. Away from the equator, winds are more in line with their associated Pole. Wind in the Northern Hemisphere is pushed toward the right.
Combination of Forces
It is a combination of forces that helps wind move in a counter-clockwise direction in a low-pressure center. Air will move within the low pressure center because there is a quasi-vacuum in these centers that attracts air molecules. Then, the magnetic pull of the Northern Hemisphere forces wind to move toward the right. Even as wind moves toward the right in the Northern Hemisphere, the winds will wrap around a low pressure center moving west to east into the center. This appears as counter-clockwise movement.