---
title: "Tropical Easterly Jet Stream (Somali Jet) — Definition"
description: "The Tropical Easterly Jet Stream drives India's summer monsoon, making it crucial for Model UN students and UPSC candidates studying climate impacts."
url: "https://modeldiplomat.com/learn/glossary/tropical-easterly-jet-stream"
---

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Model Diplomat Research Team · Last reviewed June 22, 2026

TL;DR

- The Tropical Easterly Jet is a high-altitude easterly wind current over the Indian subcontinent and Africa that drives the South Asian summer monsoon.
- How does the Tropical Easterly Jet differ from the Somali Jet?
- What causes the Tropical Easterly Jet to form?
- Is the Tropical Easterly Jet weakening due to climate change?

[Civil Service & Diplomatic Exams](https://modeldiplomat.com/learn/civil-services/glossary)Updated June 22, 2026

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Example

In the deficient monsoon of 2015, the India Meteorological Department linked below-normal rainfall partly to a weakened Tropical Easterly Jet coinciding with a strong El Niño event in the Pacific.

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