Consider the following statements regarding Western Disturbances:

1.They are shallow extratropical storms originating in the Mediterranean region that bring sudden winter rain to the northwestern parts of the Indian subcontinent.

2.An unusually high frequency of these disturbances extending into late spring (March and April) is highly beneficial for the harvesting of mature Rabi crops in Punjab and Haryana.

3.While the precipitation from these systems eventually settles atmospheric pollutants, the strong winds preceding them can temporarily worsen air quality by raising dust.

Which of the statements given above is/are correct?