Western Disturbances

In this article we will discuss Western Disturbances

  • Western disturbances are storms that originate in the Caspian or Mediterranean Sea, and bring non-monsoonal rainfall to northwest India, according to the India Meteorological Department (IMD).
  • A Western Disturbance, labelled as an extra-tropical storm originating in the Mediterranean, is an area of low pressure that brings sudden showers, snow and fog in northwest India.
  • The disturbance travels from the “western” to the eastern direction.
  • These travel eastwards on high-altitude westerly jet streams – massive ribbons of fast winds traversing the earth from west to east.
  • They gradually travel across the middle-east from Iran, Afghanistan and Pakistan to enter the Indian sub-continent.
  • Disturbance means an area of “disturbed” or reduced air pressure.
  • Equilibrium exists in nature due to which the air in a region tries to normalise its pressure.

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