When the Bay of Bengal breathes, land and life tremble
In short: In the North Indian Ocean, a single depression can trigger a cascade of devastation. From heavy rainfall in India to mass evacuations in Thailand, these systems demonstrate how atmospheric pressure shifts translate into tangible human and economic costs across entire nations.
The 2026 North Indian Ocean cyclone season highlights the volatile dynamics between two primary bodies of water: the Arabian Sea and the Bay of Bengal. While cyclones typically form between April and December, with a peak from May to November, their impact is often dictated by their interaction with landmasses. The India Meteorological Department (IMD) serves as the official Regional Specialized Meteorological Centre, providing critical data on systems that can rapidly intensify or linger over coastal regions. The season saw significant activity in the Bay of Bengal, where multiple depressions—labeled BOB 02 through BOB 06—caused widespread disruption. For instance, BOB 03 triggered heavy rainfall and flooding across Odisha and Chhattisgarh, resulting in numerous deaths from building collapses, lightning strikes, and drowning.
Similarly, BOB 06 caused severe flooding in Uttar Pradesh, killing at least 81 people and damaging over 2,200 houses, while also triggering landslides and an avalanche in Nepal. Beyond direct wind damage, these systems often manifest as 'precursor waves' or extratropical lows that cause catastrophic inland flooding. In Thailand, a system related to a Western Pacific depression triggered 48 hours of continuous heavy rain in Bangkok, recording over 300 mm of rainfall in certain areas. This resulted in at least ฿11 billion in damages and affected over half a million people across 25 provinces, illustrating the immense economic and humanitarian scale of these meteorological events.
The naming conventions in this basin are unique: names are only used once before a new list is drawn up, and there is no retirement of names. If a storm moves from the Western Pacific into the North Indian Ocean, it retains its original name, ensuring continuity for tracking across international borders.
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- Summary by Intellect · source: 2026 North Indian Ocean cyclone season
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