The Northwest Indian Dust Storms

The Northwest Indian Dust Storms

#GS-1 #Geography #Physical Geography #GS-3 #Environment #Climate Change #Current Events #National #Gujarat

Why in News

  • A massive dust storm swept across Churu and several other districts of Rajasthan on May 30, 2026.
  • This event highlights the structural degradation of the Aravalli range.

About The Northwest Indian Dust Storms

  • A dust storm, known locally as Andhi, is a natural weather event common in dry and semi-dry regions.
  • Strong winds pick up large amounts of loose sand and dust from dry soils and create a thick wall of dust.
  • This phenomenon heavily reduces visibility and ruins air quality.

Impacted Region

  • The main affected area is Northwest India, covering Rajasthan districts like Churu, Hanumangarh, Bikaner, and Jodhpur.
  • It also affects Delhi-NCR, Haryana, Punjab, and western Uttar Pradesh.
  • The protective Aravalli barrier is breaking down, allowing the dust to travel much deeper into the crowded Indo-Gangetic plains.

How It Forms

  • Pre-monsoon dust storms form due to a specific mix of heat and weather conditions.
  • Intense sunshine heats up the Thar Desert between April to June, creating pockets of extreme heat and unstable air.
  • This heavy heating creates a strong low-pressure zone near the ground.
  • Strong south-westerly and westerly winds rush in from the Middle East and the Thar to fill this empty space, carrying heavy dust.
  • Wind speeds crossing 35-40 kmph over dry soil lift dust particles into the air.
  • Without the tree cover and height of the Aravallis to stop them, these winds carry dust thousands of kilometers to the east.

Key Features

  • These storms happen only before the monsoon, reaching their peak strength in May and June.
  • In the past, the western slopes of the Aravalli range acted as a natural wall against these winds.
  • Winds hitting the slopes drop their dust, forming special obstacle sand dunes held down by desert plants.
  • Data from the IMD shows that Delhi faces an average of 2.5 dust-storm days in June alone, the highest in the country.
  • A study by the Wildlife Institute of India (WII) confirmed 12 widening operational gaps in the Aravallis because 31 entire hillocks vanished due to illegal mining.