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<p>This study presents a detailed climatological assessment of winter storms over northwest India using gridded radar data, examining storm life period, intensity, size, and movement. Results indicate that most storms are short-lived and spatially confined, but a subset of intense, long-lived storms occurs more frequently in polluted and urban-influenced regions. Gridwise analyses show that maximum storm intensities above 45 dBZ are spatially clustered, particularly downstream of urban corridors, suggesting the influence of aerosol-cloud interactions. Storm movement is predominantly northeastward, in alignment with the synoptic flow associated with Western Disturbances. The findings emphasize the combined roles of large-scale circulation and localized environmental factors—such as pollution and land use—in shaping storm characteristics. These insights support future efforts to improve storm monitoring and forecasting in India’s winter weather regime.</p>

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Doppler weather radar-based 5-year climatology of winter storms over the National Capital Region of India

  • 期刊论文

  • 发表日期：

    2025年11月10日

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  • Amit Kumar,
  • Mrutyunjay Mohapatra,
  • Mohit Dixit

摘要

This study presents a detailed climatological assessment of winter storms over northwest India using gridded radar data, examining storm life period, intensity, size, and movement. Results indicate that most storms are short-lived and spatially confined, but a subset of intense, long-lived storms occurs more frequently in polluted and urban-influenced regions. Gridwise analyses show that maximum storm intensities above 45 dBZ are spatially clustered, particularly downstream of urban corridors, suggesting the influence of aerosol-cloud interactions. Storm movement is predominantly northeastward, in alignment with the synoptic flow associated with Western Disturbances. The findings emphasize the combined roles of large-scale circulation and localized environmental factors—such as pollution and land use—in shaping storm characteristics. These insights support future efforts to improve storm monitoring and forecasting in India’s winter weather regime.